Question Banks

Question Bank - 18PCS23

Module -1

Questions 6, 8 & 9 are GATE/Placement questions. Check and write answers with justification/comments

1. 1. Write generations of computer.

   2. Describe various types of computers.

3. What is a pseudo-code? Write pseudo-code to find maximum in 3 numbers.

4. Draw the flowchart & write algorithm & Program to compute simple & compound interest.

• 1. What is an identifier? What are rules to construct identifier? Classify following as valid/invalid identifier.

  2. num1, $num1, +add, a_2, for, 1st_paper_marks

  3. Explain type conversion with example

• 1. Explain structure of a C program with example

  2. Explain syntax with examples of printf() and scanf() statements.

1. 1. List arithmetic, logical, relational & assignment operators of C with examples.

   2. Explain constants, associativity, precedence with examples.

2. Evaluate the following expressions:

3. 100%20<=20-5+100%10-20==5>=1!=20

4. A+=b*=c-=5 where a=3, b=5 & c=8

5. int a,b; float x; a=4; b=5; x=b/a ;

6. int a,b; float x; a=4; b=5; x=(float)b/a;

7. x = a-b/3 + c*2 - 1 when a = 9, b= 12 & c = 13

8. 10 != 10 || 5 < 4 && 8

9. Evaluate the z=5%3/8*3+4

10. What will be value of x in following segments:

i. int a,b; float x; a=4; b=5; x=b/a ;

ii. int a,b; float x; a=4; b=5; x=(float)b/a;

1. 1. Draw a flowchart & write a C program to convert Fahrenheit temperature to Centigrade.

   2. Write a C program to compare the largest of two umbers using conditional operator.

   3. Write a C program to find area of a triangle by given 3 sides (Program should give alert if sum of 2 sides is not greater than 3rd)

1. Write output of the following C codes:

2. void main()

3. {

4. int a=5, b=2, res1;

5. float f1=5.0, f2=2.0, res2;

6. res1=5/2.0+a/2+a/b;

7. res2=f1/2*f1-f2;

8. printf(“res1 = %d res2 = %f”,res1,res2);

9. }

10. void main()

11. {

12. int i=5,j=6,m,n;

13. m=++i+j++;

14. n=--i+j--;

15. printf(“m=%d n=%d”,m,n);

16. }

17. int main()

18. {

19. int i= 8, j = 5;

20. float x = 0.005, y = -0.01;

21. char c = ‘c’, d = ‘d’;

22. printf(“%d”, (3*i-2* j)%(2*d-c));

23. printf(“%d”, 2 * ((i / 5) + (4 * (j - 3)) % (i + j - 2)));

24. return (0);

25. }

26. 1. Write the output of following program:

    2. #define cube(x) x*x*x

    3. int main()

    4. {

    5. printf(“%d”, cube(5+2)):

    6. return (0);

    7. }

    8. #define max2(a,b) a>b?a:b

    9. int main()

    10. {

    11. int x=2.y=3,z;

    12. z=2+max2(x,y);

    13. printf(“z = %d”, z):

    14. return (0);

    15. }

    16. int main()

    17. {

    18. int n=7,p;

    19. p=n++;

    20. printf(“p=%d n=%d\n”,p,n);

    21. p=++n;

    22. printf(“p=%d n=%d\n”,p,n);

    23. printf(“%d%d%d\n”,n++,n++,n++);

    24. printf(“%d%d%d\n”,++p,++p,++p);

    25. return (0);

    26. }

Module 2

1. Differentiate between while & do...while statement. Explain the syntax of do-while statement. Write a C program to find the factorial of a number using while loop, where the number n is entered by the user. (Hint: factorial of n = 1*2*3*….*n).

2. a. Write a C Program to find GCD of two numbers using ternary operator and for loop.

b. Write a C program to plot a Pascal's triangle

3. a. Write a calculator program in C language to do simple commercial calculator operation like addition, subtraction, multiplication and division using switch statement.

b. Write a C program to plot a Pascal's triangle

4. Write a C Program to display prime numbers within a given range.

5. See the properties of following numbers:

1³+5³+3³ = 153

1⁴ + 6⁴ + 3⁴ + 4⁴ = 1634

they are called Armstrong numbers. Write a C program to display Armstrong numbers within given range

Module 3

(String handling is not in syllabus but necessary for placement & GATE)

1. a. Explain string handling functions strcat(), strcpy() & strcmp().

b. Write a C Program to concatenate two strings without using built-in function strcat( ).

2. a. Write with syntax and example to initialize 2 dimensional arrays

b. Write a C Program to transpose a matrix.

3. a. Write a C Program to find greatest number from two dimensional array.

b. Write a C program to implement Selection Sort

3. a. Write a C Program o replace each character constant of a string with next one except letters ‘a’,’A’,’z’ & ‘Z’. Thus string “Programming in C is a fun” should be modified as “Qsphsannjoh jo D jt gvo”

b. Write a C program to sort strings using Bubble Sort.

5. a. Write a C program to search a name in a sorted list of name using binary search

b. Write a C program to check whether a string (with spaces) is palindrome or not without using built-in function.

Module 4

(1. Storage class is important, 2. Pointers will be covered up to 4th Module)

1 a. What is a function/user defined function (with & without argument/parameter)? Write a function to find LCM of two numbers.

b. Write a function to accept an array of intergers and to sort it using selection sort method.

2. Explain storage class extern, auto, static and register variables with scope and their lifetime & with simple examples.

2. a. Write a C Program to find GCD of 2 numbers using recursion

b. Write a C program to find of comb(n,r) = n!/(r!*(n-r)!) . For factorial use recursion.

3. a. Write a C program to check a number whether it is prime using recursion

b. Write a C program to display Fibonacci series using while loop & recursion

3. a. Explain how pointers and arrays are related with example.

b. Differentiate the declarations

i. int *p[4]; and int (*p)[4];

ii. int *f() and int (*f)()

4. Write a C Program to find sum, mean & standard deviation of array elements using pointer

Module 5

(File handling is not in the syllabus but necessary for placement & GATE)

1. a. What are member operators of structure? Explain their use.

b. Explain Array of structure, Array within structure & structure within structure with definition

c. explain difference in structure & union.

2. How structure variables(objects) are passed as an argument to a function? Write a C program to define array of structure

with fields roll, name & marks for 60 students. Pass this array of structure to a function to sort the records based on marks

in descending order.

3. a. Describe any 5 pre-processor directives of C.

b. What is dynamic memory allocation? Explain different dynamic memory allocation/de-allocation functions of C with

syntax and example.

4. Write a C Program to copy the contents of a file to another file and to display the contents.