Programming for Problem Solving - B.Tech 2nd Semester Examination, 2025

The correct syntax for an if-statement is

1. if condition() { }
2. if (condition) {}
3. if (condition) []
4. if {condition}

C function execution always begins from

1. main()
2. constructor
3. user-defined function
4. header file

Which storage class has the default value of a variable as zero?

1. auto
2. static
3. extern
4. register

Relational operators always return

1. Float value
2. 0 or 1
3. Character
4. None

Which of the following is an exit-controlled loop?

1. while loop
2. for loop
3. do-while loop
4. None

Binary search works only on

1. Unsorted list
2. Doubly linked list
3. Sorted list
4. Any list

break keyword is used to

1. Restart loop
2. Terminate loop
3. Skip iteration
4. Exit program

In a union, memory allocated is equal to the size of

1. Sum of all members
2. Smallest member
3. Largest member
4. Twice the size

fopen("abc.txt","r") opens file in

1. Write mode
2. Append mode
3. Read mode
4. Read + Write mode

Which of the following problems can be solved using recursion?

1. Fibonacci
2. Factorial
3. GCD
4. All of the above

Write an algorithm and draw the flowchart for checking whether a number is prime or not.

Differentiate between syntax errors, logical errors, compile-time errors, and run-time errors. Provide suitable examples.

Explain function declaration, definition, and calling conventions in C. Discuss call by value and call by reference with examples.

Differentiate between while and do-while loop construct. Write a program for generating Fibonacci series using loop.

Write the differences between if, if-else, and switch statements with examples.

Explain the use of break, continue, and goto statements with examples.

How are arrays declared and initialized in C? What is bound checking? Why is it important in array programming?

What is recursion? Explain how recursion works with stack memory. Write a recursive program for finding the factorial of a number.

Write a program to perform linear search in an array. Also find its complexity in Best, Average and Worst cases.

Describe the selection sort algorithm and implement it in C language.

Explain various storage classes in C with proper examples.

Write a program to copy the contents of one file into another and explain each step of file IO.

Explain arithmetic, relational, logical, bitwise and assignment operators in C along with their precedence rules and examples.

What is the difference between structure and union? Explain with an example.