
Mid Model Viva
Authored by Devaki P
Computers
University
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Job pool is available in ---
Main memory
cache memory
Secondary memory
CPU
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which scheduler is choosing process from ready queue and put it in CPU
Long term scheduler
short term scheduler
mid term scheduler
task scheduler
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a valid deadlock prevention scheme?
Number the resources uniquely and never request a lower numbered resource than the last one requested
Request and all required resources be allocated before execution.
Release all resources before requesting a new resource
Never request a resource after releasing any resource
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Let m[0]…m[4] be mutexes (binary semaphores) and P[0] …. P[4] be processes. Suppose each process P[i] executes the following:
wait (m[i]);
wait(m[(i+1) mod 4]);
------
release (m[i]);
release (m[(i+1)mod 4]);
This could cause ---
Thrashing
Starvation, but not deadlock
Deadlock
None of the above
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Given that at a particular time of computation, the value of a counting semaphore is 7, then if 20 P operations and 15 V operations were completed on this semaphore, what is the resulting value of the semaphore?
(a) 12
(b) 2
(c) 7
(d) 42
12
7
2
42
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is dirty bit used to show?
Page with corrupted data
Wrong page
Page that is modified after being loaded into cache memory
Page with low frequency occurrence
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When a process executes the code
fork();
fork();
fork();
What are the total number of child processes created?
4
3
8
7
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