The IIT Madras BS Programming in C (Programming in C) Quiz 1 paper sat on 29 Oct 2023, in the September 2023 term: 18 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 is/are false statement(s) regarding C programming language?
It is an imperative programming language.
It is not a structured programming language.
It is a dynamically typed programming language.
The language uses curly braces ({ }) to define the scope of a for loop.
Correct answers
It is not a structured programming language.
It is a dynamically typed programming language.
Which of the following statement(s) is/are true regarding ASCII and Unicode?
Unicode is a character set.
ASCII uses 6 bits to encode a given character.
UTF-16 and UTF-32 are both variable length encoding techniques.
UTF-8 is a fixed length encoding technique.
Correct answers
Unicode is a character set.
UTF-16 and UTF-32 are both variable length encoding techniques.
Which of the following is/are valid identifiers in C language?
123var
_myVar
my-var
Var_123
myVar!
Correct answers
_myVar
Var_123
In split memory architecture, what is the purpose of cache memory?
To store the operating system
To provide the permanent storage
To temporarily store frequently used data for fast access
To control the input/output devices
Correct answer
To temporarily store frequently used data for fast access
What is the primary function of the Program Counter in a CPU?
Execute arithmetic operations
Keep track of the currently executing instruction
To control the input/output devices
Manage memory access
Correct answer
Keep track of the currently executing instruction
Suppose you have a document which contains 58 unique characters. What is the minimum number of bits required to encode a single character in this document?
2⁶
6
2⁷
7
Correct answer
6
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?
Correct answer
Consider the following steps to compute the minimum among three numbers. Load the three numbers from memory locations M[0], M[1] and M[2] and store the maximum number in M[3].
Identify the appropriate instructions to fill the blank at step 4 and step 6.
Step 4: If R[0] < R[1] then go to step 5, otherwise go to step 6
Step 6: If R[1] < R[2] then go to step 7, otherwise go to step 8
Step 4: If R[0] > R[1] then go to step 5, otherwise go to step 6
Step 6: If R[1] < R[2] then go to step 7, otherwise go to step 8
Step 4: If R[0] < R[1] then go to step 5, otherwise go to step 6
Step 6: If R[1] > R[2] then go to step 7, otherwise go to step 8
Step 4: If R[0] > R[1] then go to step 5, otherwise go to step 6
Step 6: If R[1] > R[2] then go to step 7, otherwise go to step 8
Correct answer
Step 4: If R[0] < R[1] then go to step 5, otherwise go to step 6
Step 6: If R[1] < R[2] then go to step 7, otherwise go to step 8
Consider the below C program.
The above C program is used to calculate the sum of individual digits of a number. For ex: If the value given to the variable “n” is 25, the sum of individual digits will be 7.
Fill in the placeholders “Expression1” and “Expression2” to ensure that the program functions correctly.
Expression1: r = n % 10;
Expression2: n = r;
Expression1: r = n / 10;
Expression2: n = n % 10;
Expression1: r = n % 10;
Expression2: n = n / 10;
Expression1: n = n % 10;
Expression2: r = n;
Correct answer
Expression1: r = n % 10;
Expression2: n = n / 10;
Compute the 9-bit binary representation of the decimal number 468.
011101010
111010100
011101001
111010010
Correct answer
111010100
Find the 8-bit binary representation of (− 50)10 using 2’s complement notation.
(11001111)2
(11000111)2
(11000110)2
(11001110)2
Correct answer
(11001110)2
(764)10 = (________)8
Identify the appropriate option to fill in the above blank.
1271
1364
1374
1274
Correct answer
1374
Given two integer variables, x and y, which of the following expressions ensures that both x and y are distinct positive integers if the expression returns 1?
Correct answer
Consider the following code snippet.
What will be the value of x, y and z after executing the given code snippet?
x = 2, y = 4, z = 1
x = 2, y = 4, z = 0
x = 2, y = 3, z = 1
x = 2, y = 3, z = 0
Correct answer
x = 2, y = 3, z = 0
Consider the below C program.
What will be the output of above given code?
Equal
Not Equal
Compilation error
Runtime error
Correct answer
Equal
Consider the below C program.
What would be the output of the given code?
8
3
0
4
Correct answer
0
Consider the following assembly program (assume anything after “;” is a comment).
What will be the final value stored in register R2?
Note: The answer input must be an integer. For Ex: If the answer is 32, you must enter 32 only.
Correct answer: 30
Consider the below C program.
What would be the output of the given code?
Note: The answer input must be an integer. For Ex: If the answer is 32, you must enter 32 only.
Correct answer: 120
