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21. System calls are invoked via
Call to procedure
Software interrupt
Hardware interrupts
None of the other options
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22. Interrupt vector contains
List of interrupts available in the system
List of interrupt occurred at a point
Address of interrupt service routine
Return address on occurrence of interrupt
23. Size of a "word" in a computer system is
8 bits
16 bits
32 bits
Dependent on the system
24. Direct memory access transfers data between
CPU and main memory
CPU and secondary memory
Main and secondary memory
25. Between L1 and L2 cache, which one is private to the CPU core?
L1
L2
Both L1 and L2
Neither L1 nor L2
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