Programming for Problem Solving

What is the output of the following C-code?

main()
{
    int j = 4;
    (!j != 1 ? printf("\nWelcome") : printf("\nGood Bye"));
}

1. Welcome
2. Good Bye
3. Welcome Good Bye
4. Compilation Error

The purpose of "r+" mode is to

1. Open file only for reading
2. Open file only for writing
3. Open file for both reading and writing
4. None of these

Which of the following is a bitwise operator?

1. <
2. <=
3. <<
4. &&

Members of a union use

1. Different storage locations
2. No storage locations
3. Same storage locations
4. None of these

Consider the following function implemented in C:

void printxy(int x, int y)
{
    int *ptr;
    x = 0;
    ptr = &x;
    y = *ptr;
    *ptr = 1;
    printf("%d,%d", x, y);
}

1. 0, 0
2. 0, 1
3. 1, 0
4. 1, 1

The size of a pointer to a float array of size 10 is

1. 40 bytes
2. 4 bytes
3. 20 bytes
4. Can't be determined

A function may contain

1. One return statement
2. More than two return statements
3. Two return statements
4. None of these

What would be the output of the following program?

int main()
{
    float a = 3.15529;
    printf("\n%6.2f", a);
}

1. 16
2. 15
3. 15529
4. Compilation error

Determine the output for the given program:

#include<stdio.h>
#define mul(x) x*8
int main()
{
    int y = mul(10/3);
    printf("%d", y);
}

1. 0
2. 24
3. 24.33
4. 26.64

In C, if you pass an array as an argument to a function, what actually gets passed?

1. Value of elements in array
2. Base address of the array
3. First element of the array
4. Address of the last element of array

Explain the role of operating system and compiler. Differentiate between syntax errors and logical errors in programming with appropriate examples.

Define Algorithm along with its characteristics. Draw the flowchart to illustrate the concept of break and continue statements taking suitable examples.

What is tail recursion? Write a recursive function to display the first n terms of the Fibonacci series. Also write the main program.

Write a C program to find the greatest of the three numbers entered through the keyboard using (i) nested if-else and (ii) conditional operators.

Write a C program to generate the following pattern:

GFEDCBA
 FEDCBA
  EDCBA
   DCBA
    CBA
     BA
      A

Compare the working of while and do-while loops using flow diagram and examples.

Compare switch and else-if ladder. Write a program in C which prints all the digits of a positive integer number entered by user into words. E.g., if 732 is entered through the keyboard, the program should output "seven three two".

Discuss about some built-in string functions. Write a C program to test whether a given string is a palindrome string.

Discuss the difference between Call by value and Call by reference with suitable examples.

Explain the memory representation of one- and two-dimensional arrays in C programming with neat diagrams. Write a C program to multiply matrices A1 (m×n) and A2 (n×q) and store the results in matrix R (m×q).

Differentiate between structure and union. For what kind of applications are unions useful? Explain with an example.

Arrange the following given numbers in ascending order using selection sort technique: 17, 7, 4, 9, 11, 3, 15. Clearly explain every pass. Write a C function to implement selection sort and analyse its performance in terms of time complexity.

Write a C program using structures to read the following information of 50 employees: employee name, employee id-number, experience (in years) and salary. The program should print the number and names of all the employees who have 5 years or more experience but salary less than Rs. 10,000.

Write a program in C to count the number of lines, words, and characters in a given text file.

Operator Precedence and Associativity

Bitwise Operators

Pointer to an Array

Binary Search