ISRO CS 2011

Question 51

In DMA transfer scheme, the transfer scheme other than burst mode is

• cycle technique
• stealing technique
• cycle stealing technique
• cycle bypass technique

Question 52

n-th derivative of xⁿ is

• n x^n-1
• nⁿ . n!
• nxⁿ !
• n!

Question 53

A total of 9 units of a resource type available, and given the safe state shown below, which of the following sequence will be a safe state?

Process   Used    Max
  P1        2      7
  P2        1      6
  P3        2      5
  P4        1      4

• (P4, P1, P3, P2)
• (P4, P2, P1, P3)
• (P4, P2, P3, P1)
• (P3, P1, P2, P4)

Question 54

Three coins are tossed simultaneously. The probability that they will fall two heads and one tail is

• 5/8
• 1/8
• 2/3
• 3/8

Question 55

What is the output of the following C code?

#include 
int main()
{
int index;
for(index=1; index<=5; index++)
{
printf("%d", index);
if (index==3)
continue;
}
}

• 1245
• 12345
• 12245
• 12354

Question 56

When n-type semiconductor is heated?

• number of electrons increases while that of holes decreases
• number of holes increases while that of electrons decreases
• number of electrons and holes remain the same
• number of electron and holes increases equally

Question 57

The Cyclomatic Complexity metric V(G) of the following control flow graph

• 3
• 4
• 5
• 6

Question 58

The arithmetic mean of attendance of 49 students of class A is 40% and that of 53 students of class B is 35%. Then the percentage of arithmetic mean of attendance of class A and B is

• 27.2%
• 50.25%
• 51.13%
• 37.4%

Question 59

Which of the following sentences can be generated by

S -> aS | bA
A -> d | cA

• bccdd
• abbcca
• abcabc
• abcd

Question 60

Lightweight Directory Access protocol is used for

• Routing the packets
• Authentication
• obtaining IP address
• domain name resolving