C Programming Quiz Set 5

Choose the correct option to fill ?1 and ?2 so that the program below prints an input string in reverse order. Assume that the input string is terminated by a new line character.

void reverse(void){
  int c;
  if(?1) reverse();
  ?2
}

main(){
  printf("Enter Text"); printf("\n");
  reverse(); printf("\n");
}

 [GATE 2008, 2 Marks]

The following program is to be tested for statement coverage:

begin
   if(a == b) { S1; exit;}
   else if(c == d){S2;}
   else {S3; exit;}
   S4;
end

The test cases \(T_1\), \(T_2\), \(T_3\) and \(T_4\) given below are expressed in terms of the properties satisfied by the values of variables \(a\), \(b\), \(c\) and \(d\). The exact values are not given.

• \(T_1\): \(a\), \(b\), \(c\) and \(d\) are all equal.
• \(T_2\): \(a\), \(b\), \(c\) and \(d\) are all distinct.
• \(T_3\): \(a = b\), \(c\ ne d\)
• \(T_4\): \(a \ne b\), \(c = d\)

Which of the test suits given below ensures coverage of statements \(S_1\), \(S_2\), \(S_3\) and \(S_4\)?   [GATE 2010, 2 Marks]

Consider the following recursive C function that takes two arguments.

unsigned int foo(unsigned int n, unsigned int r)
{
   if(n > 0) return (n % r) + foo(n / r, r);
   else return 0;
}

What is the return value of the function foo when it is called as foo(345, 10)? [GATE 2011, 2 Marks]

Consider problem 3
What is the return value of the function foo when it is called as foo(513, 2)? [GATE 2011, 2 Marks]

What will be the output of the following C program statement?

char inChar = 'A';
switch(inChar)
{
   case 'A' : printf("Choice A\n");
   case 'B' :
   case 'C' : printf("Choice B");
   case 'D' :
   case 'E' :
   default  : printf("No Choice");
}

[GATE 2012, 1 Marks]

Consider the following C code segment.

int a, b, c = 0;
void prtFun(void);
main()
{
  static int a = 1; /* Line 1 */
  prtFun();
  a += 1;
  prtFun();
  printf("\n%d %d",a,b);
}
void prtFun(void)
{
  static int a = 2; /* Line 2 */
  int b = 1;
  a += ++b;
  printf("\n%d %d",a,b);
}

What output will be generated by the given code segment?  [GATE 2012, 2 Marks]

3   1
4   1
4   2

4   2
6   1
6   1

4   2
6   2
2   0

3   1
5   2
5   2

Consider problem 6
What output will be generated by the given code segment if:

• Line 1 is replaced by auto int a = 1;
• Line 2 is replaced by register int a = 2;     [GATE 2012, 2 Marks]

3   1
4   1
4   2

4   2
6   1
6   1

4   2
6   2
2   0

4   2
4   2
2   0

Consider the following program in C language:

#include<stdio.h>
main()
{
   int i;
   int *pi = &i;
   scanf("%d",pi);
   printf("%d\n", i + 5);
}

Which one of the following statement is TRUE?   [GATE 2014 (SET 1), 2 Marks]

Consider the following pseudo code.

D = 2
for i = 1 to n do
  for j = i to n do
    for k = j+1 to n do
       D = d * 3

What is the total number of multiplication to be performed?   [GATE 2014 (SET 1), 2 Marks]

Suppose \(n\) and \(p\) are unsigned int variables in a C program. We wish to set \(p\) to  \(n \choose x\). If \(n\) is large, which one of the following statement is most likely to set \(p\) correctly.  [GATE 2014 (SET 2), 1 Marks]