Week 8 Answers
1) A function prototype is used for
a) Declaring the function logic
b) Calling the function from the main body
c) Telling the compiler, the kind of arguments used in the function
d) Telling the user for proper use of syntax while calling the function
Answer: C
2) What is the output of the following C program?
#include <stdio.h>
void foo(), f();
int main()
return 0;
void foo()
printf("2 ");
void f()
printf("1 ");
foo(); a) Compiler error as foo() is not declared in main
b) 1 2
c) 2 1
d)Compile time error due to declaration of functions inside main
Answer: B
3) How many times ‘Hi’ will be printed in the program given below
#include<stdio.h>
int i;
int fun();
int main()
while(i)
main();
printf("Hello\n");
return 0;
int fun()
printf("Hi");a) Only once
b) Zero times
c) Infinite times
d) Compilation error
Answer: B
4) What is the output of the C code given below
#include <stdio.h>
float func(float age[]);
int main()
float result, age[] = {23.4, 55, 22.6, 3, 40.5, 18};
result = func(age);
printf("%0.2f", result);
return 0;
float func(float age[])
int i;
float result, sum = 0.0;
for (i = 0; i < 6; i++) {
sum += age[i];
result = (sum / 6);
}
return result;a) 27.08
b) 27.083334
c) Compiler error as result is declared twice
d) Error: Invalid prototype declaration
Answer: A
5) Which statement is correct about Passing by value parameters?
a) It cannot change the actual parameter value
b) It can change the actual parameter value
c) Parameter is always in read-write mode
d) None of them
Answer: A
6) What will be the output?
int main()
int a = 70;
printf("%d", a);
return 0;a) 70
b) Garbage value
c) Compilation error
d) None
Answer: C
7) How many times Hello world will be printed?
#include<stdio.h>
int main()
printf("Hello world\n");
return 0; a) Infinite times
b) 32767
c) 65535
d) Till stack overflows
Answer: D
8) What will be the output?
#include<stdio.h>
void func(int n, int sum)
int k = 0, j = 0;
if (n == 0) return;
j = n / 10;
sum = sum + k;
func(j, sum);
printf("%d, ", k);
int main()
int a = 2048, sum = 0;
func(a, sum);
printf("%d ", sum);
return 0;a) 8, 4, 0, 2, 14
b) 8, 4, 0, 2, 0
c)2, 0, 4, 8, 14
d) 2, 0, 4, 8, 0
Answer: B
9) Consider the function
find(int x, int y)
return((x < y) ? 0 : (x - y)); Let a and b be two non-negative integers. The call find(a, find(a, b)) can be used to find the
a) Maximum of a, b
b) Positive difference between a and b
c) Sum of a and b
d) Minimum of a and b
Answer: D
10) Consider the function
int fun(int x)
if (x > 100)
then fun(x - 10);
else
return x; For the input x = 95, the function will return
a) 89
b) 90
c) 91
d) 92
Answer: C
