What is the function of the Linux 'cron' utility? MCQ with Answer and Explanation

Question
What is the function of the Linux 'cron' utility?
A. Monitors system logs
B. Compresses files
C. Manages network connections
D. Schedules jobs to run at specified times or intervals
Answer: Option D
Solution (By JKSSB Mock Tests)
cron is a time-based job scheduler that executes scripts or commands automatically according to a schedule.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
Which Linux command is used to change the permissions of a file with symbolic notation?
A. chmod u+x file
B. chmod g+w file
C. chmod o-r file
D. All of the above
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Correct Answer: Option D

Explanation:
chmod accepts symbolic mode like u+x (add execute for owner), g+w (add write for group), o-r (remove read for others).
This question belongs to: Computer Operating Systems
Question #2
Which of the following is a type of process scheduling algorithm that uses multiple queues with different priorities?
A. First-Come, First-Served
B. Priority Scheduling
C. Round Robin
D. Multilevel Queue Scheduling
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Correct Answer: Option D

Explanation:
Multilevel queue partitions processes into separate queues based on priority, with scheduling policies for each queue.
This question belongs to: Computer Operating Systems
Question #3
Which Linux command is used to set or change the system's time zone?
A. timezone
B. date -s
C. tzselect
D. timedatectl
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Correct Answer: Option D

Explanation:
timedatectl set-timezone is the modern systemd command; tzselect is interactive but only sets environment.
This question belongs to: Computer Operating Systems
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