Programming for Problem Solving - B.Tech 2nd Semester Examination, 2025 (Old Course)

Which of the following cannot be a variable name in C?

1. volatile
2. true
3. friend
4. export

Which of the following typecasting is accepted by C language

1. Widening conversions
2. Narrowing conversions
3. Widening & Narrowing conversions
4. None of the mentioned

Which of the following is NOT possible with any 2 operators in C?

1. Different precedence, same associativity
2. Different precedence, different associativity
3. Same precedence, different associativity
4. All of the mentioned

Functions can return enumeration constants in C?

1. true
2. false
3. depends on the compiler
4. depends on the standard

C preprocessors can have compiler specific features.

1. True
2. False
3. Depends on the standard
4. Depends on the platform

How many number of pointer (*) does C have against a pointer variable declaration?

1. 7
2. 127
3. 255
4. No limits

Which of the following is not possible statically in C language?

1. Jagged Array
2. Rectangular Array
3. Cuboidal Array
4. Multidimensional Array

What will be the value of the following assignment expression?
(x = foo())!=1 considering foo() returns 2

1. 2
2. True
3. 1
4. 0

Comment on the following C statement
n=1; printf("%d, %d ", 3*n, n++);

1. Output will be 3, 2
2. Output will be 3, 1
3. Output will be 6, 1
4. Output is compiler dependent

What are the elements present in the array of the following C code?
int array[5]={5};

1. 5, 5, 5, 5, 5
2. 5, 0, 0, 0, 0
3. 5, NULL, NULL, NULL, NULL
4. 5

Explain the major components of a computer system. How does the operating system help in program execution?

Write an algorithm and flowchart to find the largest of three numbers.

Explain the different arithmetic operators in C. Write the rules for evaluating arithmetic expressions with precedence and associativity.

Write a program to reverse a number using a loop. Explain the concept of an infinite loop with examples. Why do infinite loops occur?

Explain array declaration and initialization with examples for 1-D and 2-D arrays. Also explain the concept of bound checking.

Write a C program to perform Binary Search on a sorted array.

What is call by reference? How is passing an array to a function an example of call by reference? Explain with code.

Write a program that reads marks of 5 students into an array and uses a function to compute the average. Demonstrate passing an array to a function.

Define a structure Student with name, roll, marks. Write a C program to input data for 3 students and print it.

Write a note on accessing structure elements using (a) dot operator, (b) pointer-to-structure. Give examples.

Explain the concept of pointers in C. How are pointers defined and used? Illustrate with a program that swaps two numbers using pointers.

Write a C program using pointers to reverse an array in-place. Explain how pointers are used in the program.

Write a recursive C program to find the factorial of a number. Also explain base case and recursive case.

Explain the Ackermann function. Write a recursive program for it. Why is it not suitable for large values?