What does 'Thrashing' indicate in virtual memory system logs? MCQ with Answer and Explanation

Question
What does 'Thrashing' indicate in virtual memory system logs?
A. The system is spend overwhelmingly more time handling page swaps than processing actual application operations.
B. A network link is heavily saturated with incoming packets.
C. The CPU core is overheating due to intense graphic gaming.
D. The hard drive is performing a high-speed defragmentation sweep.
Answer: Option A
Solution (By JKSSB Mock Tests)
Thrashing signals a severe memory deficit where the OS continuously pages data back and forth from disk, dropping productive execution to near zero.
This question belongs to: Computer Operating Systems
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Question #1
In operating systems, what is the primary function of the 'Medium-Term Scheduler'?
A. To assign processes directly to an available CPU core.
B. To control the initial BIOS POST test routines.
C. To swap processes out of main memory to secondary storage (and vice versa) to control the degree of multiprogramming.
D. To handle real-time peripheral device drivers.
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Correct Answer: Option C

Explanation:
The medium-term scheduler removes processes from main memory temporarily (swapping out) to reduce the degree of multiprogramming and manage memory constraints.
This question belongs to: Computer Operating Systems
Question #2
Which of the following is a disadvantage of paging?
A. Internal fragmentation
B. Complex memory management
C. External fragmentation
D. Slow allocation
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Correct Answer: Option A

Explanation:
Paging causes internal fragmentation because the last page of a process may not be fully used; external fragmentation is eliminated.
This question belongs to: Computer Operating Systems
Question #3
Which Linux command is used to mount a file system at boot?
A. Entries in /etc/fstab
B. mount -a
C. All of the above
D. systemctl mount
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Correct Answer: Option C

Explanation:
/etc/fstab defines mount points; mount -a mounts all entries in fstab; systemd can also handle mount units.
This question belongs to: Computer Operating Systems
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