Two Marks Questions with Answers

Two Marks Questions with Answers

 

Q.1 What is primitive data type?

Ans. : Primitive data types in C are the fundamental data types such as int, float, char and void.

The int data type is for representing the whole number values.

 

Q.2 What is the difference between for and while statement ?

Ans. :

 

Q.3 Explain the use of void data type.

Ans. : • The void data type indicates that the function is returning nothing.

• If the function is not returning anything from the function then its data type is specified as void.

 

Q.4 What is the use of arrays ?

Ans. : Array is used to store the elements of same data type. For storing the strings - the arrays is used.

 

Q.5 Explain the concept of string in C.

Ans. : String is a collection of characters. For example

char a="hello";

char a=['h', 'e', '1', '1', 'o'];

 

Q.6 Differentiate between while and do-while loops.

Ans.

 

Q.7 What do you mean by nested loops ?

Ans.

Nested loops mean loops within the loops. For example for nested, the loop is given below

for (i=0;i<n;i++)

{

for(j=0;j<n;j++)

{

printf("It's My Life!!!");

}

}

 

Q.8 How will you initialize array in C ?

Ans. There are two ways by which an array can be initialized -

i) Initializing an array at declaration.

ii) Initializing an array with the help of loop.

Initializing an array means storing some value in it at some specific location.

i) Initializing an array at declaration -

At declaration of an array it can be initialized..

For example:

int a[5] = {10, 20, 30, 40};

float marks [8] = {33.2, 57.8, 76.5, 81.3};

ii) Initializing array with the help of loop -

Using for loop or while loop an array can be initialized.

For example -

30

For (i=0; i<5; i++)

{

scanf("%d", &a[i]);

}

 

Q.9 What is the purpose of do-while statement ?

Ans. :

The purpose of do-while is to bring looping in programming statements. The way to write the do... while statement is -

do

{

…

statements;

…

while (some condition);

For example

count = 1

do

{

printf("\n I am on first line of do-while");

count++;

} while (count < = 5);

 

Q.10 What are the basic operations performed on an array ?

Ans.: Array is simply a collection of elements which are of same data type. Mainly we can perform following operations on an array-

i) Storing the elements in an array

ii) Retrieving or printing elements from an array.

Following 'C' program performs these operations-

#include <stdio.h>

#include <conio.h>

main( )

{

int a[10], index;

clrscr( );

printf ("In Store The Elements In An Array a");

for (index = 0; index < = 9; index++)

scanf("%d", &a[index]);//storing elements in array

printf ("\n Retrieving the array elements");

for (index=0; index <=9; index++)

printf("%d", a[index]); //retrieving elements from array

}

 

Q.11 List the primary data types in C.

Ans. : Primary data types in C are as given below

Q.12 What are string operations defined in C?

Ans. : Various string operations defined in C are

1) strlen(): For Finding out length of string

2) strcpy(): For copying the one string to another

3) strcat(): For concatenating two strings

4) strcmp(): For comparing two strings

5) strrev(): For reversing two strings

 

Q. 13 What is a static variable? Give an example.

Ans. : Static variables are those variable that retain their values even after they come out of the scope.

For example

#include<stdio.h>

int fun( )

{

static int count = 0;

count++;

return count;

}

int main( )

{

printf("\n%d",fun());

printf("\n%d",fun());

printf("\n%d",fun());

printf("\n%d",fun());

return 0;

}

Output

1

2

3

4

 

Q.14 Write a C program to get a paragraph of text as input.

AU: Dec.-19

Ans. :

#include<stdio.h>

int main( ) {

char para[100];

printf("Enter Paragraph: ");

scanf("%[^\t]s", para);//accept all the characters except tab

printf("Accepted Paragraph: %s", para);

return 0;

}

 

Q.15 How an n dimensional array is represented ?

AU: May-19

Ans. : A multidimensional array is declared using the following syntax : type array_name[d1][d2] [d3][d4]....................[dn];

where each d is a dimension, and dn is the size of final dimension.

The conceptual syntax for 3D array is this:

data_type array_name[table][row][column];

 

Q.16 Differentiate between row major and column major representation of arrays.

AU: Dec.-19

Ans. : In row-major order, consecutive elements of the rows of the array are contiguous in memory; in column-major order, consecutive elements of the columns are contiguous.

The difference between row-major and column-major order is simply that the order of the dimensions is reversed.