What does a 'Page Table Base Register (PTBR)' store in a hardware configuration? MCQ with Answer and Explanation

Question
What does a 'Page Table Base Register (PTBR)' store in a hardware configuration?
A. The layout coordinates of the desktop wallpaper.
B. The current CPU clock frequency.
C. The total count of connected external monitor screens.
D. The physical memory address pointing to the start of the active process's page table.
Answer: Option D
Solution (By JKSSB Mock Tests)
The PTBR is a dedicated processor register that holds the physical starting address of the active thread's page table map.
This question belongs to: Computer Operating Systems
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Question #1
In Android, which component is used to receive and respond to system-wide broadcast announcements?
A. Content Provider
B. Broadcast Receiver
C. Service
D. Activity
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Correct Answer: Option B

Explanation:
Broadcast Receivers listen for system events (like boot completed, battery low) and allow apps to respond.
This question belongs to: Computer Operating Systems
Question #2
What happens during a page fault in virtual memory management?
A. The computer experiences a fatal hardware crash.
B. The hard disk sector becomes permanently corrupted.
C. The system runs out of network bandwidth.
D. The processor attempts to access a page of memory that is not currently loaded in the physical RAM.
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Correct Answer: Option D

Explanation:
A page fault is an interrupt raised by hardware when a program tries to access a memory page mapped in virtual space but not loaded into the physical RAM.
This question belongs to: Computer Operating Systems
Question #3
Which Linux command is used to display system hardware information?
A. lspci
B. dmesg
C. lsusb
D. lshw
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Correct Answer: Option D

Explanation:
lshw (list hardware) provides comprehensive hardware details; other commands show specific devices.
This question belongs to: Computer Operating Systems
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