Consider the following equation: Figure from the original question paper If all the variables are float, which of the following is a correct way to write the given equation in C language?

(A) Option figure from the original question paper

(D) Option figure from the original question paper

(B) Option figure from the original question paper

(C) Option figure from the original question paper

January 2025 term · Introduction to C Programming · CS1101

Introduction to C Programming Qualifier: 13 April 2025 (January 2025 term)

The IIT Madras BS Introduction to C Programming (Intro to C Programming) Qualifier paper sat on 13 Apr 2025, in the January 2025 term: 16 questions for 50 marks in 120 minutes. Every question is below with its answer. Take it as a timed mock test to be marked, or read it through first.

Questions: 16
Marks: 50
Duration: 120 min
MCQ: 11
MSQ: 1
Numerical: 4

Take as mock test Practise with answers

Updated 25 Sept 2026

Official paper: IIT M ES REATTEMPT AN EXAM QEQ1 13 Apr 2025 · No negative marking.

Question 1

+3 marksOne correct option

The main purpose of cache memory is to:

A
Store data permanently.
B
Reduce the burden on the ALU.
C
Speed up access to frequently used data and instructions.
D
Manage memory allocation between processes.

Show answer

Correct answer

C
Speed up access to frequently used data and instructions.

Question 1 on its own pageAlso asked in End Term 13 Apr 2025

Question 2

+3 marksOne correct option

Identify the option that arranges the following memory types in descending order of size (from largest to smallest).

A
Secondary Memory (Hard Drive), Main Memory (RAM), Cache Memory, Registers
B
Main Memory (RAM), Secondary Memory (Hard Drive), Registers, Cache Memory
C
Main Memory (RAM), Secondary Memory (Hard Drive), Cache Memory, Registers
D
Secondary Memory (Hard Drive), Registers, Main Memory (RAM), Cache Memory

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Correct answer

A
Secondary Memory (Hard Drive), Main Memory (RAM), Cache Memory, Registers

Question 2 on its own page

Question 3

+3 marksOne correct option

What is the minimum number of bits required for binary representation of (1912)10?

A
9
B
10
C
11
D
12

Show answer

Correct answer

C
11

Question 3 on its own pageAlso asked in End Term 13 Apr 2025

Question 4

+3 marksOne correct option

What is the decimal equivalents for the binary number 10011011?

A
155
B
153
C
154
D
160

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Correct answer

A
155

Question 4 on its own pageAlso asked in End Term 13 Apr 2025

Question 5

+3 marksOne correct option

What is the sum of the hexadecimal numbers AB, 3C and 4F as a decimal number?

A
270
B
140
C
310
D
80

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Correct answer

C
310

Question 5 on its own pageAlso asked in End Term 13 Apr 2025

Question 6

+3 marksOne correct option

The 16-bit binary representation of decimal number “-256” in 2's complement notation is__.

A
11111111 00000000
B
11111000 00000000
C
11111111 11111000
D
10000000 00000000

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Correct answer

A
11111111 00000000

Question 6 on its own pageAlso asked in End Term 13 Apr 2025

Question 7

+3 marksOne correct option

Consider the following code snippet.

What will be the value of x, y and z after executing the given code snippet?

A
x = 0, y = 4, z = 0
B
x = 1, y = 4, z = 1
C
x = 1, y = 3, z = 1
D
x = 0, y = 3, z = 0

Show answer

Correct answer

D
x = 0, y = 3, z = 0

Question 7 on its own page

Question 8

+3 marksOne correct option

Which of the following statements correctly declares and initializes an integer variable named age in C?

A
int age = 25;
B
age = 25;
C
int *age = 25;
D
age = int(25);

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Correct answer

A
int age = 25;

Question 8 on its own pageAlso asked in End Term 13 Apr 2025

Question 9

+3 marksOne correct option

Shree is writing a program to calculate the product of the first 10 multiples of 4. He has written a code, but one statement is missing.

1int i = 4;
2int product = 1;
3while(i <= 40)
4{
5    product = product  * i;
6    ---- missing statement ----
7}
8printf("%d",product);

A
i = i * 4
B
i = i + 1
C
i = i + 4
D
i = 4

Show answer

Correct answer

C
i = i + 4

Question 9 on its own page

Question 10

+3 marksOne correct option

Which of the following special symbols is allowed in a variable name?

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Correct answer

Question 10 on its own page

Question 11

+4 marksOne correct option

What will be the output if the user enters x = 4 and y = 10 in the following program?

1#include <stdio.h>
2int main() {
3    int x, y;
4    scanf("%d %d", &x, &y);
5    if (x >= 5) {
6        if (y < 10)
7            printf("Case 1");
8        else
9            printf("Case 2");
10    } else {
11        if (y == 10)
12            printf("Case 3");
13        else
14            printf("Case 4");
15    }
16    return 0;
17}

A
Case 1
B
Case 2
C
Case 3
D
Case 4

Show answer

Correct answer

C
Case 3

Question 11 on its own page

Question 12

+4 marksOne or more correct options

Consider the following equation:

If all the variables are float, which of the following is a correct way to write the given equation in C language?

Select all that apply.

Show answer

Correct answers

Question 12 on its own page

Question 13

+3 marksNumerical answer

Consider the computations given below using the generalized memory model.
1. M[0] ← 7
2. M[1] ← 5
3. M[1] ← M[1] * M[1]
4. M[0] ← M[1] - M[0]
5. M[1] ← M[1] - M[0]
6. M[0] ← M[1] + M[0]
7. M[2] ← M[0]
What is the value of M[2] at the end of the computation?

Show answer

Correct answer: 25

Question 13 on its own pageAlso asked in End Term 13 Apr 2025

Question 14

+3 marksNumerical answer

Consider the computations given below using the generalized memory model.

$R[0] \leftarrow 5$
$R[1] \leftarrow 3$
$R[2] \leftarrow 7$
If $R[0] < R[1]$ then go to step 5, otherwise go to step 6
$R[1] = R[0]$
If $R[1] < R[2]$ then go to step 7, otherwise go to step 8
$R[2] = R[1]$
$R[3] = R[2]$

What is the value of R[3] at the end of the computation?

Show answer

Correct answer: 3

Question 14 on its own page

Question 15

+3 marksNumerical answer

Consider the below code segment

1#include <stdio.h>
2
3int main()
4{
5      int i = 2, j = 1;
6      switch(i + j)
7      {
8      case 1:
9            j++;
10      case 2:
11            j++;
12      case 3:
13            j++;
14      case 4:
15            j++;
16      default:
17            j++;
18      }
19      printf("%d",j);
20 }

What will be the output of the above program?

Show answer

Correct answer: 4

Question 15 on its own page

Question 16

+3 marksNumerical answer

Consider the C program given below.

1#include <stdio.h>
2int main()
3{
4      for(int i=0; i<15; i++)
5      {
6          if(i%3==0)
7          {
8              continue;
9          }
10          printf("Hello\n");
11      }
12      return 0;
13}

How many times “Hello” gets printed?

Show answer

Correct answer: 10

Question 16 on its own page