Q. Which of the following is FALSE ?

View solution

Q. The following program:

main()
{
if(fork()>0)
sleep(100);
}

results in the creation of:

View solution

Q. The following C program executes :

main()
{
fork();fork();printf("yes");
}
prints yes:

View solution

Q. A virtual memory system uses First In First Out (FIFO) page replacement policy and allocates a fixed number of frames to a process. Consider the following statements :

P : Increasing the number of page frames allocated to a process sometimes increases the page fault rate
Q : Some programs do not exhibit locality of reference

Which of the following is TRUE?

View solution

Q. For 3 page frames, the following is the reference string :

7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1

How many page faults does the LRU page replacement algorithm produce ?

View solution

Q. Applying the LRU page replacement to the following reference string :

1 2 4 5 2 1 2 4

The main memory can accommodate 3 pages and it already has pages 1 and 2. Page 1 came in before page 2.
How many page faults will occur ?

View solution

Q. In the working set model, for :

2 6 1 5 7 7 7 7 5 1 6 2 3 4 1 2 3 4 4 4 3 4 3 4 4 4 1 3 2 3

if DELTA = 10, then the working set at time t1 (….7 5 1) is :

View solution

Q. Consider the following page reference string :

1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6

For LRU page replacement algorithm with 4 frames, the number of page faults is :

View solution

Q. Consider the following page reference string :

1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6

For FIFO page replacement algorithms with 3 frames, the number of page faults is :

View solution

Q. Consider the following page reference string :

1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6

For FIFO page replacement algorithms with 4 frames, the number of page faults is :

View solution

Q. Consider the following page reference string :

1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6

For Optimal page replacement algorithms with 3 frames, the number of page faults is :

View solution

Q. What command is used to count the total number of lines, words, and characters contained in a file?

View solution

Q. What command is used to remove files?

View solution

Q. What command is used to remove the directory?

View solution

Q. What command is used with vi editor to delete a single character?

View solution

Q. What hardware architectures are not supported by Red Hat?

View solution

Q. The physical layer of a network

View solution

Q. What TCP/IP protocol is used for remote terminal connection service?

View solution

Q. How many networks and nodes per network, are allowed by the Class B network?

View solution

Q. What service is used to translate domain names to IP addresses?

View solution