The IIT Madras BS Programming in C (Programming in C) Quiz 1 paper sat on 26 Oct 2025, in the September 2025 term: 17 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.
Which of the following correctly ranks the memory units from fastest to slowest access time?
Cache → Registers → RAM → Hard Disk → Optical Disk
Registers → Cache → RAM → SSD → Hard Disk
RAM → Registers → Cache → SSD → Hard Disk
Registers → RAM → Cache → HDD → SSD
Correct answer
Registers → Cache → RAM → SSD → Hard Disk
In an N-bit signed integer representation using 2’s complement, what is the range of values?
Correct answer
Which of the following statements about Boolean conditions in C is true?
In C, 0 represents true, and any non-zero value represents false.
In C, 0 represents false, and any non-zero value represents true.
C treats only positive integers as true.
In C, positive integers represent true, and negative integers represent false.
Correct answer
In C, 0 represents false, and any non-zero value represents true.
The decimal number 2748 is represented in hexadecimal as:
0xABC
0xABD
0xABE
0xABF
Correct answer
0xABC
What is the minimum number of bits required to represent all integer values from −120 to +120 in a signed binary representation?
5 Bits
6 bits
7 bits
8 bits
9 bits
Correct answer
8 bits
a = 13, b = -4, c = 12
a = 12, b = -3, c = 11
a = 14, b = -5, c = 13
a = 11, b = -2, c = 10
Correct answer
a = 13, b = -4, c = 12
100
200
300
400
Correct answer
400
6 5 4
6 4 5
6 3 5
6 5 3
Correct answer
6 5 3
Sum of first N natural numbers
Sum of squares of first N natural numbers
Sum of cubes of first N natural numbers
Factorial of N
Correct answer
Sum of squares of first N natural numbers
0 1 2 5 6
0 1 5 6
1 2 3 6
1 2 3 5 6
Correct answer
1 2 3 6
Which of the following are key functions of the Arithmetic Logic Unit (ALU)?
Addition and subtraction
Logical comparisons (>, <, =)
Memory storage management
Multiplication and division
Instruction decoding
Correct answers
Addition and subtraction
Logical comparisons (>, <, =)
Multiplication and division
Which statement is true about short-circuit evaluation in C?
In expr1 && expr2, if expr1 is false, expr2 is not evaluated.
In expr1 || expr2, if expr1 is true, expr2 is not evaluated.
In expr1 && expr2, if expr1 is true, expr2 is not evaluated.
In expr1 || expr2, if expr1 is false, expr2 is not evaluated.
Correct answers
In expr1 && expr2, if expr1 is false, expr2 is not evaluated.
In expr1 || expr2, if expr1 is true, expr2 is not evaluated.
Correct answers
a = 6, b = 4
a = 3, b = 5
a = 2, b = -3
a = 4, b = 6
Correct answers
a = 2, b = -3
a = 4, b = 6
Correct answer: 13
Correct answer: 5
Correct answer: 21
