Question
1. Examine the busy wait locks using the TSL instruction on page 126 of Tanenbaum. Suppose you had a ‘sleep’ and ‘wakeup’ assembly code instructions. The ‘sleep’ assembly call would allow a process to give up the cpu and block while waiting on a variable ‘lock’ (sleep(lock)). The ‘wakeup’ assembly code instruction would unblock all processes sleeping on a ‘lock’ (wakeup(lock)).
a. Use these assembly code instructions to modify the ‘enter_region’ and ‘leave_region’ to avoid the busy wait in those routines.
b. What would happen if multiple processes were waiting on the lock when the process that acquired the lock left the critical region and freed the lock?

2. Examine the Linux clone() system call, which creates a new process with a much greater degree of control than the conventional UNIX fork() call. Compare and contrast these two calls, and explain, if you were going to have one of these calls in a new operating system that you would build, which would you pick, and why?

3. On page 128 of your text, Tanenbaum explains the priority inversion problem that can take place if the higher priority process is in a busy wait while a lower priority process is in a critical region. If the higher priority process instead blocks instead of a busy wait, the lower priority process can run and give up lock to the critical region, allowing the higher priority process to run, and thus preventing the priority inversion. Explain how priority inversion can occur when a real-time priority scheduling scheme is used in an operating system which supports blocking waits. Explain how the operating system can fix this problem.

4. Discuss how the following pairs of scheduling criteria conflict in certain settings.
a. CPU utilization and response time
b. Average turnaround time and maximum waiting time
c. I/O device utilization and CPU utilization

5. Suppose a real time operating system contains four periodic events with periods of 100, 200, 400 and 800 ms respectively. The first three events take 25ms, 60ms and 150ms respectively. What is the maximum amount of time the fourth event can take and keep the system schedulable? (Show your work.) You may assume the context switching time is negligible.
Solution Preview

These solutions may offer step-by-step problem-solving explanations or good writing examples that include modern styles of formatting and construction of bibliographies out of text citations and references.
Students may use these solutions for personal skill-building and practice.
Unethical use is strictly forbidden.

1. Examine the busy wait locks using the TSL instruction on page 126 of Tanenbaum. Suppose you had a ‘sleep’ and ‘wakeup’ assembly code instructions. The ‘sleep’ assembly call would allow a process to give up the cpu and block while waiting on a variable ‘lock’ (sleep(lock)). The ‘wakeup’ assembly code instruction would unblock all processes sleeping on a ‘lock’ (wakeup(lock)).
a. Use these assembly code instructions to modify the ‘enter_region’ and ‘leave_region’ to avoid the busy wait in those routines.
enter_region
TSL REGISTER,LOCK
CMP REGISTER,#0
             JNE busy
             RET
busy
sleep(lock)
JNE enter_region

leave region:
             MOVE LOCK,#0
             wakeup(lock)
             RET
b. What would happen if multiple processes were waiting on the lock when the process that acquired the lock left the critical region and freed the lock?
i. The first process which enters the critical region will set the lock
ii. Other process will test the lock then go to sleep
This is only a preview of the solution.
Please use the purchase button to see the entire solution.
By purchasing this solution you'll be able to access the following files:
Solution.docx
Purchase Solution
$83.00 $41.5
Google Pay
Amazon
Paypal
Mastercard
Visacard
Discover
Amex
View Available Computer Science Tutors 529 tutors matched
Ionut
(ionut)
Hi! MSc Applied Informatics & Computer Science Engineer. Practical experience in many CS & IT branches.Research work & homework
5/5 (5,654+ sessions)
2 hours avg response
Leo
(Leo)
Hi! I have been a professor in New York and taught in a math department and in an applied math department.
4.9/5 (5,652+ sessions)
2 hours avg response
Pranay
(math1983)
Ph.D. in mathematics and working as an Assistant Professor in University. I can provide help in mathematics, statistics and allied areas.
4.6/5 (5,512+ sessions)
1 hour avg response

Similar Homework Solutions

8.1.0PHP Version365msRequest Duration45MBMemory UsageGET college-homework-library/{category}/{subject}/{id}Route
    • Booting (266ms)time
    • Application (98.82ms)time
    • 1 x Booting (72.89%)
      266ms
      1 x Application (27.11%)
      98.82ms
      • Illuminate\Routing\Events\Routing (836μs)
      • Illuminate\Routing\Events\RouteMatched (349μs)
      • Illuminate\Foundation\Events\LocaleUpdated (2.36ms)
      • eloquent.booting: App\Models\HomeworkLibrary\HomeworkLibrary (183μs)
      • eloquent.booted: App\Models\HomeworkLibrary\HomeworkLibrary (246μs)
      • Illuminate\Database\Events\ConnectionEstablished (966μs)
      • Illuminate\Database\Events\StatementPrepared (9.7ms)
      • Illuminate\Database\Events\QueryExecuted (1.03ms)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (387μs)
      • eloquent.booting: App\Models\Subject (78μs)
      • eloquent.booted: App\Models\Subject (70μs)
      • Illuminate\Database\Events\StatementPrepared (1.14ms)
      • Illuminate\Database\Events\QueryExecuted (799μs)
      • eloquent.retrieved: App\Models\Subject (103μs)
      • eloquent.booting: App\Models\HomeworkLibrary\HomeworkLibraryFile (97μs)
      • eloquent.booted: App\Models\HomeworkLibrary\HomeworkLibraryFile (38μs)
      • Illuminate\Database\Events\StatementPrepared (554μs)
      • Illuminate\Database\Events\QueryExecuted (1.21ms)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibraryFile (116μs)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibraryFile (20μs)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibraryFile (14μs)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibraryFile (11μs)
      • eloquent.booting: App\Models\SubjectCat (407μs)
      • eloquent.booted: App\Models\SubjectCat (49μs)
      • Illuminate\Database\Events\StatementPrepared (777μs)
      • Illuminate\Database\Events\QueryExecuted (1.02ms)
      • eloquent.retrieved: App\Models\SubjectCat (103μs)
      • Illuminate\Cache\Events\CacheHit (10.65ms)
      • Illuminate\Cache\Events\CacheMissed (152μs)
      • Illuminate\Database\Events\StatementPrepared (993μs)
      • Illuminate\Database\Events\QueryExecuted (3.14ms)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (76μs)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (18μs)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (8μs)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (7μs)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (6μs)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (6μs)
      • Illuminate\Database\Events\StatementPrepared (661μs)
      • Illuminate\Database\Events\QueryExecuted (743μs)
      • eloquent.retrieved: App\Models\Subject (76μs)
      • Illuminate\Cache\Events\KeyWritten (800μs)
      • Illuminate\Database\Events\StatementPrepared (1.25ms)
      • Illuminate\Database\Events\QueryExecuted (893μs)
      • Illuminate\Database\Events\StatementPrepared (678μs)
      • Illuminate\Database\Events\QueryExecuted (792μs)
      • Illuminate\Database\Events\StatementPrepared (755μs)
      • Illuminate\Database\Events\QueryExecuted (738μs)
      • eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibraryFile (51μs)
      • Illuminate\Cache\Events\CacheHit (464μs)
      • creating: homework.show (265μs)
      • composing: homework.show (81μs)
      • creating: components.breadcrumbs (238μs)
      • composing: components.breadcrumbs (87μs)
      • Illuminate\Database\Events\StatementPrepared (1.08ms)
      • Illuminate\Database\Events\QueryExecuted (1.03ms)
      • eloquent.retrieved: App\Models\SubjectCat (71μs)
      • Illuminate\Cache\Events\CacheHit (2.68ms)
      • Illuminate\Cache\Events\CacheHit (135μs)
      • Illuminate\Cache\Events\CacheHit (138μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (123μs)
      • Illuminate\Cache\Events\CacheHit (150μs)
      • Illuminate\Cache\Events\CacheHit (165μs)
      • Illuminate\Cache\Events\CacheHit (106μs)
      • Illuminate\Cache\Events\CacheHit (161μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (119μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (116μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (156μs)
      • Illuminate\Cache\Events\CacheHit (119μs)
      • Illuminate\Cache\Events\CacheHit (130μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (149μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (135μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (98μs)
      • Illuminate\Cache\Events\CacheHit (114μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (132μs)
      • Illuminate\Cache\Events\CacheHit (115μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (140μs)
      • Illuminate\Cache\Events\CacheHit (105μs)
      • Illuminate\Cache\Events\CacheHit (130μs)
      • Illuminate\Cache\Events\CacheHit (111μs)
      • Illuminate\Cache\Events\CacheHit (127μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (168μs)
      • Illuminate\Cache\Events\CacheHit (131μs)
      • Illuminate\Cache\Events\CacheHit (124μs)
      • Illuminate\Cache\Events\CacheHit (131μs)
      • Illuminate\Cache\Events\CacheHit (124μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (134μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (129μs)
      • Illuminate\Cache\Events\CacheHit (103μs)
      • Illuminate\Cache\Events\CacheHit (129μs)
      • Illuminate\Cache\Events\CacheHit (115μs)
      • Illuminate\Cache\Events\CacheHit (130μs)
      • Illuminate\Cache\Events\CacheHit (116μs)
      • Illuminate\Cache\Events\CacheHit (133μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (159μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (135μs)
      • Illuminate\Cache\Events\CacheHit (107μs)
      • Illuminate\Cache\Events\CacheHit (131μs)
      • Illuminate\Cache\Events\CacheHit (117μs)
      • Illuminate\Cache\Events\CacheHit (139μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (130μs)
      • Illuminate\Cache\Events\CacheHit (119μs)
      • Illuminate\Cache\Events\CacheHit (134μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (136μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (184μs)
      • Illuminate\Cache\Events\CacheHit (135μs)
      • Illuminate\Cache\Events\CacheHit (148μs)
      • Illuminate\Cache\Events\CacheHit (178μs)
      • Illuminate\Cache\Events\CacheHit (133μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (140μs)
      • Illuminate\Cache\Events\CacheHit (116μs)
      • Illuminate\Cache\Events\CacheHit (152μs)
      • Illuminate\Cache\Events\CacheHit (117μs)
      • Illuminate\Cache\Events\CacheHit (125μs)
      • Illuminate\Cache\Events\CacheHit (111μs)
      • Illuminate\Cache\Events\CacheHit (127μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (128μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (128μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (110μs)
      • Illuminate\Cache\Events\CacheHit (130μs)
      • Illuminate\Cache\Events\CacheHit (106μs)
      • Illuminate\Cache\Events\CacheHit (135μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (140μs)
      • Illuminate\Cache\Events\CacheHit (103μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (105μs)
      • Illuminate\Cache\Events\CacheHit (128μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (105μs)
      • Illuminate\Cache\Events\CacheHit (200μs)
      • Illuminate\Cache\Events\CacheHit (124μs)
      • Illuminate\Cache\Events\CacheHit (174μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (143μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (125μs)
      • Illuminate\Cache\Events\CacheHit (123μs)
      • Illuminate\Cache\Events\CacheHit (131μs)
      • Illuminate\Cache\Events\CacheHit (99μs)
      • Illuminate\Cache\Events\CacheHit (131μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (603μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (124μs)
      • Illuminate\Cache\Events\CacheHit (106μs)
      • Illuminate\Cache\Events\CacheHit (122μs)
      • Illuminate\Cache\Events\CacheHit (108μs)
      • Illuminate\Cache\Events\CacheHit (134μs)
      • Illuminate\Cache\Events\CacheHit (110μs)
      • Illuminate\Cache\Events\CacheHit (125μs)
      • Illuminate\Cache\Events\CacheHit (106μs)
      • Illuminate\Cache\Events\CacheHit (125μs)
      • Illuminate\Cache\Events\CacheHit (108μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (105μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (156μs)
      • Illuminate\Cache\Events\CacheHit (123μs)
      • Illuminate\Cache\Events\CacheHit (138μs)
      • Illuminate\Cache\Events\CacheHit (143μs)
      • Illuminate\Cache\Events\CacheHit (127μs)
      • Illuminate\Cache\Events\CacheHit (96μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (98μs)
      • Illuminate\Cache\Events\CacheHit (111μs)
      • Illuminate\Cache\Events\CacheHit (93μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (114μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (116μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (122μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (108μs)
      • Illuminate\Cache\Events\CacheHit (125μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (133μs)
      • Illuminate\Cache\Events\CacheHit (115μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (128μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (136μs)
      • Illuminate\Cache\Events\CacheHit (114μs)
      • Illuminate\Cache\Events\CacheHit (149μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (144μs)
      • Illuminate\Cache\Events\CacheHit (129μs)
      • Illuminate\Cache\Events\CacheHit (132μs)
      • Illuminate\Cache\Events\CacheHit (196μs)
      • Illuminate\Cache\Events\CacheHit (143μs)
      • Illuminate\Cache\Events\CacheHit (110μs)
      • Illuminate\Cache\Events\CacheHit (119μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (99μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (104μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (111μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (104μs)
      • Illuminate\Cache\Events\CacheHit (136μs)
      • Illuminate\Cache\Events\CacheHit (115μs)
      • Illuminate\Cache\Events\CacheHit (129μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (124μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (98μs)
      • Illuminate\Cache\Events\CacheHit (122μs)
      • Illuminate\Cache\Events\CacheHit (98μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (100μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (145μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (152μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (143μs)
      • Illuminate\Cache\Events\CacheHit (180μs)
      • Illuminate\Cache\Events\CacheHit (137μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (117μs)
      • Illuminate\Cache\Events\CacheHit (99μs)
      • Illuminate\Cache\Events\CacheHit (114μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (116μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (104μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (108μs)
      • Illuminate\Cache\Events\CacheHit (618μs)
      • Illuminate\Cache\Events\CacheHit (117μs)
      • Illuminate\Cache\Events\CacheHit (128μs)
      • Illuminate\Cache\Events\CacheHit (108μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (107μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (107μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (108μs)
      • Illuminate\Cache\Events\CacheHit (119μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (134μs)
      • Illuminate\Cache\Events\CacheHit (103μs)
      • Illuminate\Cache\Events\CacheHit (119μs)
      • Illuminate\Cache\Events\CacheHit (204μs)
      • Illuminate\Cache\Events\CacheHit (155μs)
      • Illuminate\Cache\Events\CacheHit (135μs)
      • Illuminate\Cache\Events\CacheHit (143μs)
      • Illuminate\Cache\Events\CacheHit (107μs)
      • Illuminate\Cache\Events\CacheHit (140μs)
      • Illuminate\Cache\Events\CacheHit (111μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (104μs)
      • Illuminate\Cache\Events\CacheHit (119μs)
      • Illuminate\Cache\Events\CacheHit (106μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (115μs)
      • Illuminate\Cache\Events\CacheHit (104μs)
      • Illuminate\Cache\Events\CacheHit (117μs)
      • Illuminate\Cache\Events\CacheHit (103μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (108μs)
      • Illuminate\Cache\Events\CacheHit (119μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (131μs)
      • Illuminate\Cache\Events\CacheHit (107μs)
      • Illuminate\Cache\Events\CacheHit (123μs)
      • Illuminate\Cache\Events\CacheHit (103μs)
      • Illuminate\Cache\Events\CacheHit (116μs)
      • Illuminate\Cache\Events\CacheHit (105μs)
      • Illuminate\Cache\Events\CacheHit (119μs)
      • Illuminate\Cache\Events\CacheHit (100μs)
      • Illuminate\Cache\Events\CacheHit (112μs)
      • Illuminate\Cache\Events\CacheHit (125μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (108μs)
      • Illuminate\Cache\Events\CacheHit (170μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (139μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (125μs)
      • Illuminate\Cache\Events\CacheHit (100μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (100μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (96μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (95μs)
      • Illuminate\Cache\Events\CacheHit (116μs)
      • Illuminate\Cache\Events\CacheHit (97μs)
      • Illuminate\Cache\Events\CacheHit (131μs)
      • Illuminate\Cache\Events\CacheHit (106μs)
      • Illuminate\Cache\Events\CacheHit (121μs)
      • Illuminate\Cache\Events\CacheHit (99μs)
      • Illuminate\Cache\Events\CacheHit (122μs)
      • Illuminate\Cache\Events\CacheHit (93μs)
      • Illuminate\Cache\Events\CacheHit (114μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (117μs)
      • Illuminate\Cache\Events\CacheHit (106μs)
      • Illuminate\Cache\Events\CacheHit (129μs)
      • Illuminate\Cache\Events\CacheHit (109μs)
      • Illuminate\Cache\Events\CacheHit (144μs)
      • Illuminate\Cache\Events\CacheHit (117μs)
      • Illuminate\Cache\Events\CacheHit (124μs)
      • Illuminate\Cache\Events\CacheHit (159μs)
      • Illuminate\Cache\Events\CacheHit (144μs)
      • Illuminate\Cache\Events\CacheHit (107μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (110μs)
      • creating: site.layouts.app (383μs)
      • composing: site.layouts.app (18μs)
      • creating: components.canonical (341μs)
      • composing: components.canonical (79μs)
      • creating: components.open-graph (125μs)
      • composing: components.open-graph (49μs)
      • creating: site.headers.header (188μs)
      • composing: site.headers.header (50μs)
      • Illuminate\Cache\Events\CacheHit (1.26ms)
      • creating: components.footer (82μs)
      • composing: components.footer (78μs)
      • Illuminate\Cache\Events\CacheHit (653μs)
      • Illuminate\Cache\Events\CacheHit (224μs)
      • Illuminate\Cache\Events\CacheHit (173μs)
      • Illuminate\Cache\Events\CacheHit (123μs)
      • Illuminate\Cache\Events\CacheHit (115μs)
      • Illuminate\Cache\Events\CacheHit (110μs)
      • Illuminate\Cache\Events\CacheHit (113μs)
      • Illuminate\Cache\Events\CacheHit (187μs)
      • Illuminate\Cache\Events\CacheHit (204μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (120μs)
      • Illuminate\Cache\Events\CacheHit (122μs)
      • Illuminate\Cache\Events\CacheHit (126μs)
      • Illuminate\Cache\Events\CacheHit (133μs)
      • creating: components.forms.contact-us (187μs)
      • composing: components.forms.contact-us (108μs)
      • creating: components.forms.get-started (103μs)
      • composing: components.forms.get-started (45μs)
      • creating: components.forms.free-tool-download (73μs)
      • composing: components.forms.free-tool-download (41μs)
      • creating: components.forms.claim-free-worksheet (68μs)
      • composing: components.forms.claim-free-worksheet (38μs)
      • creating: components.forms.tutor-subscription-waitlist (68μs)
      • composing: components.forms.tutor-subscription-waitlist (36μs)
      • creating: components.forms.tutor-subscription-join (65μs)
      • composing: components.forms.tutor-subscription-join (37μs)
      • creating: components.forms.tutor-support (68μs)
      • composing: components.forms.tutor-support (39μs)
      • 321 x Illuminate\Cache\Events\CacheHit (15.12%)
        55.14ms
        10 x Illuminate\Database\Events\StatementPrepared (4.82%)
        17.58ms
        10 x Illuminate\Database\Events\QueryExecuted (3.13%)
        11.40ms
        1 x Illuminate\Foundation\Events\LocaleUpdated (0.65%)
        2.36ms
        1 x Illuminate\Database\Events\ConnectionEstablished (0.26%)
        966μs
        1 x Illuminate\Routing\Events\Routing (0.23%)
        836μs
        1 x Illuminate\Cache\Events\KeyWritten (0.22%)
        800μs
        7 x eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (0.14%)
        508μs
        1 x eloquent.booting: App\Models\SubjectCat (0.11%)
        407μs
        1 x creating: site.layouts.app (0.11%)
        383μs
        1 x Illuminate\Routing\Events\RouteMatched (0.1%)
        349μs
        1 x creating: components.canonical (0.09%)
        341μs
        1 x creating: homework.show (0.07%)
        265μs
        1 x eloquent.booted: App\Models\HomeworkLibrary\HomeworkLibrary (0.07%)
        246μs
        1 x creating: components.breadcrumbs (0.07%)
        238μs
        5 x eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibraryFile (0.06%)
        212μs
        1 x creating: site.headers.header (0.05%)
        188μs
        1 x creating: components.forms.contact-us (0.05%)
        187μs
        1 x eloquent.booting: App\Models\HomeworkLibrary\HomeworkLibrary (0.05%)
        183μs
        2 x eloquent.retrieved: App\Models\Subject (0.05%)
        179μs
        2 x eloquent.retrieved: App\Models\SubjectCat (0.05%)
        174μs
        1 x Illuminate\Cache\Events\CacheMissed (0.04%)
        152μs
        1 x creating: components.open-graph (0.03%)
        125μs
        1 x composing: components.forms.contact-us (0.03%)
        108μs
        1 x creating: components.forms.get-started (0.03%)
        103μs
        1 x eloquent.booting: App\Models\HomeworkLibrary\HomeworkLibraryFile (0.03%)
        97μs
        1 x composing: components.breadcrumbs (0.02%)
        87μs
        1 x creating: components.footer (0.02%)
        82μs
        1 x composing: homework.show (0.02%)
        81μs
        1 x composing: components.canonical (0.02%)
        79μs
        1 x composing: components.footer (0.02%)
        78μs
        1 x eloquent.booting: App\Models\Subject (0.02%)
        78μs
        1 x creating: components.forms.free-tool-download (0.02%)
        73μs
        1 x eloquent.booted: App\Models\Subject (0.02%)
        70μs
        1 x creating: components.forms.claim-free-worksheet (0.02%)
        68μs
        1 x creating: components.forms.tutor-subscription-waitlist (0.02%)
        68μs
        1 x creating: components.forms.tutor-support (0.02%)
        68μs
        1 x creating: components.forms.tutor-subscription-join (0.02%)
        65μs
        1 x composing: site.headers.header (0.01%)
        50μs
        1 x composing: components.open-graph (0.01%)
        49μs
        1 x eloquent.booted: App\Models\SubjectCat (0.01%)
        49μs
        1 x composing: components.forms.get-started (0.01%)
        45μs
        1 x composing: components.forms.free-tool-download (0.01%)
        41μs
        1 x composing: components.forms.tutor-support (0.01%)
        39μs
        1 x composing: components.forms.claim-free-worksheet (0.01%)
        38μs
        1 x eloquent.booted: App\Models\HomeworkLibrary\HomeworkLibraryFile (0.01%)
        38μs
        1 x composing: components.forms.tutor-subscription-join (0.01%)
        37μs
        1 x composing: components.forms.tutor-subscription-waitlist (0.01%)
        36μs
        1 x composing: site.layouts.app (0%)
        18μs
      14 templates were rendered
      • 1x homework.showshow.blade.phpblade
      • 1x components.breadcrumbsbreadcrumbs.blade.phpblade
      • 1x site.layouts.appapp.blade.phpblade
      • 1x components.canonicalcanonical.blade.phpblade
      • 1x components.open-graphopen-graph.blade.phpblade
      • 1x site.headers.headerheader.blade.phpblade
      • 1x components.footerfooter.blade.phpblade
      • 1x components.forms.contact-uscontact-us.blade.phpblade
      • 1x components.forms.get-startedget-started.blade.phpblade
      • 1x components.forms.free-tool-downloadfree-tool-download.blade.phpblade
      • 1x components.forms.claim-free-worksheetclaim-free-worksheet.blade.phpblade
      • 1x components.forms.tutor-subscription-waitlisttutor-subscription-waitlist.blade.phpblade
      • 1x components.forms.tutor-subscription-jointutor-subscription-join.blade.phpblade
      • 1x components.forms.tutor-supporttutor-support.blade.phpblade
      uri
      GET college-homework-library/{category}/{subject}/{id}
      middleware
      web, utm.parameters
      controller
      App\Http\Controllers\HomeworkLibraryController@show
      namespace
      where
      as
      homework.show
      file
      app/Http/Controllers/HomeworkLibraryController.php:79-176
      10 statements were executed, 4 of which were duplicates, 6 unique. Show only duplicated21.13ms
      • Connection Establishedtwenty4_siteHomeworkLibraryController.php#91
        Backtrace
        • 13. app/Http/Controllers/HomeworkLibraryController.php:91
        • 14. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 15. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 16. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `solutionslibrary` where `status` = 'published' and `price` > 0 and `solutionslibrary`.`id` = '38945' limit 1
        10.03mstwenty4_siteHomeworkLibraryController.php#97
        Bindings
        • 0: published
        • 1: 0
        • 2: 38945
        Backtrace
        • 16. app/Http/Controllers/HomeworkLibraryController.php:97
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `subjects` where `subjects`.`id` in (258)
        880μstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
        • 21. app/Http/Controllers/HomeworkLibraryController.php:97
        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 24. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 25. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` in (38945)
        900μstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
        • 21. app/Http/Controllers/HomeworkLibraryController.php:97
        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 24. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 25. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `subject_cats` where `subject_cats`.`id` = 3 limit 1
        1.21mstwenty4_siteHomeworkLibrary.php#201
        Bindings
        • 0: 3
        Backtrace
        • 20. app/Models/HomeworkLibrary/HomeworkLibrary.php:201
        • 26. app/Http/Controllers/HomeworkLibraryController.php:105
        • 27. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 28. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 29. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
      • select * from `solutionslibrary` where `id` <> 38945 and `subject` = 258 and `status` = 'published' and `price` > 0 order by RAND() limit 6
        3.47mstwenty4_siteHomeworkLibraryRepository.php#30
        Bindings
        • 0: 38945
        • 1: 258
        • 2: published
        • 3: 0
        Backtrace
        • 14. app/Repositories/HomeworkLibraryRepository.php:30
        • 15. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 16. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 18. app/Repositories/HomeworkLibraryRepository.php:39
        • 19. app/Http/Controllers/HomeworkLibraryController.php:139
      • select * from `subjects` where `subjects`.`id` in (258)
        930μstwenty4_siteHomeworkLibraryRepository.php#30
        Backtrace
        • 19. app/Repositories/HomeworkLibraryRepository.php:30
        • 20. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 21. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 23. app/Repositories/HomeworkLibraryRepository.php:39
        • 24. app/Http/Controllers/HomeworkLibraryController.php:139
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 38945 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'question' order by `order` asc, `id` asc
        890μstwenty4_siteHomeworkLibrary.php#260
        Bindings
        • 0: 38945
        • 1: question
        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:58
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
        • 21. vendor/league/fractal/src/Scope.php:383
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 38945 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'teaser' order by `order` asc, `id` asc
        830μstwenty4_siteHomeworkLibrary.php#260
        Bindings
        • 0: 38945
        • 1: teaser
        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:69
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
        • 21. vendor/league/fractal/src/Scope.php:383
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 38945 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'solution' order by `order` asc, `id` asc
        830μstwenty4_siteHomeworkLibrary.php#260
        Bindings
        • 0: 38945
        • 1: solution
        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:80
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
        • 21. vendor/league/fractal/src/Scope.php:383
      • select * from `subject_cats` where `subject_cats`.`id` = 3 limit 1
        1.16mstwenty4_siteHomeworkLibrary.php#201
        Bindings
        • 0: 3
        Backtrace
        • 20. app/Models/HomeworkLibrary/HomeworkLibrary.php:201
        • 32. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
        • 33. vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
        • 34. vendor/livewire/livewire/src/ComponentConcerns/RendersLivewireComponents.php:69
        • 35. vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:70
      App\Models\HomeworkLibrary\HomeworkLibrary
      7HomeworkLibrary.php
      App\Models\HomeworkLibrary\HomeworkLibraryFile
      5HomeworkLibraryFile.php
      App\Models\Subject
      2Subject.php
      App\Models\SubjectCat
      2SubjectCat.php
          _token
          rqqmg93RUj4MxgOmzcCheDtKdRHuw5PyuzjQxLb7
          utm_source
          direct
          redirectUrl
          /college-homework-library/Computer-Science/Operating-Systems/38945
          _previous
          array:1 [ "url" => "https://staging.dev.24houranswers.com/college-homework-library/Computer-Scienc...
          _flash
          array:2 [ "old" => [] "new" => [] ]
          PHPDEBUGBAR_STACK_DATA
          []
          path_info
          /college-homework-library/Computer-Science/Operating-Systems/38945
          status_code
          200
          
          status_text
          OK
          format
          html
          content_type
          text/html; charset=UTF-8
          request_query
          []
          
          request_request
          []
          
          request_headers
          0 of 0
          array:21 [ "priority" => array:1 [ 0 => "u=0, i" ] "accept-encoding" => array:1 [ 0 => "gzip, deflate, br, zstd" ] "sec-fetch-dest" => array:1 [ 0 => "document" ] "sec-fetch-user" => array:1 [ 0 => "?1" ] "sec-fetch-mode" => array:1 [ 0 => "navigate" ] "sec-fetch-site" => array:1 [ 0 => "none" ] "accept" => array:1 [ 0 => "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7" ] "user-agent" => array:1 [ 0 => "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)" ] "upgrade-insecure-requests" => array:1 [ 0 => "1" ] "sec-ch-ua-platform" => array:1 [ 0 => ""Windows"" ] "sec-ch-ua-mobile" => array:1 [ 0 => "?0" ] "sec-ch-ua" => array:1 [ 0 => ""HeadlessChrome";v="129", "Not=A?Brand";v="8", "Chromium";v="129"" ] "cache-control" => array:1 [ 0 => "no-cache" ] "pragma" => array:1 [ 0 => "no-cache" ] "x-amzn-trace-id" => array:1 [ 0 => "Root=1-680d2eb0-795b501124edb937728a8c7c" ] "host" => array:1 [ 0 => "staging.dev.24houranswers.com" ] "x-forwarded-port" => array:1 [ 0 => "443" ] "x-forwarded-proto" => array:1 [ 0 => "https" ] "x-forwarded-for" => array:1 [ 0 => "18.117.101.118" ] "content-length" => array:1 [ 0 => "" ] "content-type" => array:1 [ 0 => "" ] ]
          request_cookies
          []
          
          response_headers
          0 of 0
          array:5 [ "content-type" => array:1 [ 0 => "text/html; charset=UTF-8" ] "cache-control" => array:1 [ 0 => "no-cache, private" ] "date" => array:1 [ 0 => "Sat, 26 Apr 2025 19:06:24 GMT" ] "set-cookie" => array:2 [ 0 => "XSRF-TOKEN=eyJpdiI6IitHNGMxSVFTSHlEekhmNVUxZWdzZnc9PSIsInZhbHVlIjoiVGVLd0M0NGZFdVNQUFduT1FuWHJ2MHhucDJXWUc2UkxRT3ZkdytzcUdneGlYeDR6dW5JTFBhenplWWNjQ1BvOU11OUtxblVhbVRVWk45c0VsTkkva05ZbnRtOFkrZzBnbXFrVkRMUXhKQUNxOXc0SWZCdkhLRFR3U01GVlRwSGUiLCJtYWMiOiIyYWQ1ZmM3MjBhMWZiZmQwODIxZTBlYTkyNGQxNmRkMTc2OGE3MDU4OTQ0YWYxNzExYmNjOGU2NDVlNDc0NTUyIiwidGFnIjoiIn0%3D; expires=Sat, 26 Apr 2025 21:06:24 GMT; Max-Age=7200; path=/; domain=.24houranswers.com; samesite=laxXSRF-TOKEN=eyJpdiI6IitHNGMxSVFTSHlEekhmNVUxZWdzZnc9PSIsInZhbHVlIjoiVGVLd0M0NGZFdVNQUFduT1FuWHJ2MHhucDJXWUc2UkxRT3ZkdytzcUdneGlYeDR6dW5JTFBhenplWWNjQ1BvOU11OUtxb" 1 => "24houranswers_session=eyJpdiI6IlZONDRKNXBFVUtIWkdiaUZHR1dHZGc9PSIsInZhbHVlIjoieXBuNmFTSy9ZNkQyMjI1STVWSjBaZzVLMkNQcjBYblFMTTB1WndRZEp4YVNiakMrNkxBRFptRFpvNTc5U0E2UG94TWQ3eTRCUlEwTGE4c0I3OGpXalVoWG9KdGthR3BNZzZIb2wvL2lLSlZ5OGZHOTlzK3hxTEoyTU9TeFFaVHAiLCJtYWMiOiIyNTM2NTBhMDI1MDU3ZjRmOTgzOGZjYjM2MmM1MDk2MzYzMWZmM2EyOTkyMGFmOGU2NTdiNDE5MWEzNGVkOTRhIiwidGFnIjoiIn0%3D; expires=Sat, 26 Apr 2025 21:06:24 GMT; Max-Age=7200; path=/; domain=.24houranswers.com; httponly; samesite=lax24houranswers_session=eyJpdiI6IlZONDRKNXBFVUtIWkdiaUZHR1dHZGc9PSIsInZhbHVlIjoieXBuNmFTSy9ZNkQyMjI1STVWSjBaZzVLMkNQcjBYblFMTTB1WndRZEp4YVNiakMrNkxBRFptRFpvNTc5U0" ] "Set-Cookie" => array:2 [ 0 => "XSRF-TOKEN=eyJpdiI6IitHNGMxSVFTSHlEekhmNVUxZWdzZnc9PSIsInZhbHVlIjoiVGVLd0M0NGZFdVNQUFduT1FuWHJ2MHhucDJXWUc2UkxRT3ZkdytzcUdneGlYeDR6dW5JTFBhenplWWNjQ1BvOU11OUtxblVhbVRVWk45c0VsTkkva05ZbnRtOFkrZzBnbXFrVkRMUXhKQUNxOXc0SWZCdkhLRFR3U01GVlRwSGUiLCJtYWMiOiIyYWQ1ZmM3MjBhMWZiZmQwODIxZTBlYTkyNGQxNmRkMTc2OGE3MDU4OTQ0YWYxNzExYmNjOGU2NDVlNDc0NTUyIiwidGFnIjoiIn0%3D; expires=Sat, 26-Apr-2025 21:06:24 GMT; domain=.24houranswers.com; path=/XSRF-TOKEN=eyJpdiI6IitHNGMxSVFTSHlEekhmNVUxZWdzZnc9PSIsInZhbHVlIjoiVGVLd0M0NGZFdVNQUFduT1FuWHJ2MHhucDJXWUc2UkxRT3ZkdytzcUdneGlYeDR6dW5JTFBhenplWWNjQ1BvOU11OUtxb" 1 => "24houranswers_session=eyJpdiI6IlZONDRKNXBFVUtIWkdiaUZHR1dHZGc9PSIsInZhbHVlIjoieXBuNmFTSy9ZNkQyMjI1STVWSjBaZzVLMkNQcjBYblFMTTB1WndRZEp4YVNiakMrNkxBRFptRFpvNTc5U0E2UG94TWQ3eTRCUlEwTGE4c0I3OGpXalVoWG9KdGthR3BNZzZIb2wvL2lLSlZ5OGZHOTlzK3hxTEoyTU9TeFFaVHAiLCJtYWMiOiIyNTM2NTBhMDI1MDU3ZjRmOTgzOGZjYjM2MmM1MDk2MzYzMWZmM2EyOTkyMGFmOGU2NTdiNDE5MWEzNGVkOTRhIiwidGFnIjoiIn0%3D; expires=Sat, 26-Apr-2025 21:06:24 GMT; domain=.24houranswers.com; path=/; httponly24houranswers_session=eyJpdiI6IlZONDRKNXBFVUtIWkdiaUZHR1dHZGc9PSIsInZhbHVlIjoieXBuNmFTSy9ZNkQyMjI1STVWSjBaZzVLMkNQcjBYblFMTTB1WndRZEp4YVNiakMrNkxBRFptRFpvNTc5U0" ] ]
          session_attributes
          0 of 0
          array:6 [ "_token" => "rqqmg93RUj4MxgOmzcCheDtKdRHuw5PyuzjQxLb7" "utm_source" => "direct" "redirectUrl" => "/college-homework-library/Computer-Science/Operating-Systems/38945" "_previous" => array:1 [ "url" => "https://staging.dev.24houranswers.com/college-homework-library/Computer-Science/Operating-Systems/38945" ] "_flash" => array:2 [ "old" => [] "new" => [] ] "PHPDEBUGBAR_STACK_DATA" => [] ]