AMU MCA C Programming Language Previous Year Questions (PYQs) – Page 1 of 3
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Showing 23 questions
Output of the following C-code
main()
{
printf("Hello");
main();
}
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Solution
Recursive call without stopping condition → infinite printing until stack overflow.
Predict the output of the following program:
int main()
{
int arr[5];
// Assume base address of arr is 2000 and size of integer is 32 bit
arr++;
printf("%u", arr);
return 0;
}
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Solution
Array name arr represents base address.
Size of int = 32 bit = 4 bytes.
Base address = 2000.
After arr++, pointer moves by one integer = 4 bytes.
New address = 2000 + 4 = 2004.
What is the similarity between a structure, union and enumeration?
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Solution
struct, union and enum are all user-defined data types in C.
In the following program, how many times “for” loop will be executed?
#include <stdio.h>
int main()
{
int i = 59, j = 10;
for( ; j ; i )
printf("%d", i);
}
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Solution
Loop condition is j, which is non-zero and never changes.
Hence the loop runs infinitely.
A pointer is
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Solution
A pointer is defined as a variable that stores the address of another variable.
In the following program, how many times ‘for’ loop will be executed?
#include <stdio.h>
void main()
{
int i = 5;
for (;;)
printf("%d", i);
}
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Solution
The loop condition is for(;;) which has no condition and no termination statement. Hence the loop never stops.
What is the output for the program given below?
#include <stdio.h>
void main()
{
int i = 5;
for (; i < 12; i++);
printf("%d", i);
}
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Solution
The semicolon ; after the for loop makes it an empty loop.
The loop increments i until $i = 12$.
After the loop ends, printf prints the final value of i.
What is the output of the program given below?
#include <stdio.h>
void main()
{
int i = 500, j = 1000, k = 100;
if (j == 1000 && i > 400)
k = (j == 1000 && i > 499);
printf("k=%d", k);
else
printf("k=%d", k);
}
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Solution
Condition j==1000 && i>400 is true, so if part executes.
Inside: (j==1000 && i>499) → both true → value 1 assigned to k.
Output is k=1.
What is the output of the following program?
#include
int main()
{
int i = 100, j = 300, k;
j = i ^ j;
i = i ^ j;
j = i ^ j;
printf("The values of i and j are %d, %d", i, j);
return 0;
}
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Solution
This is the XOR swap technique.
After execution, values of i and j are swapped.
So output is 300, 100.
Suppose that in a C program snippet, following statements are used:
i) sizeof(int)
ii) sizeof(int*)
iii) sizeof(int**)
Assuming size of pointer is 4 bytes and size of int is also 4 bytes, pick the most correct answer.
Assuming size of pointer is 4 bytes and size of int is also 4 bytes, pick the most correct answer.
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Solution
Given that size of int = 4 bytes and size of pointer = 4 bytes,
sizeof(int) = sizeof(int*) = sizeof(int**) = 4 bytes.
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