NIOS Class 12 Computer Science Chapter 14 Control Statements

NIOS Class 12 Computer Science Chapter 14 Control Statements Solutions English Medium As Per New Syllabus. to each chapter is provided in the list so that you can easily browse throughout different chapters NIOS Class 12 Computer Science Chapter 14 Control Statements Notes and select need one. NIOS Class 12 Computer Science Question Answers Download PDF. NIOS Study Material of Class 12 Computer Science Notes Paper 330.

NIOS Class 12 Computer Science Chapter 14 Control Statements

Also, you can read the NIOS book online in these sections Solutions by Expert Teachers as per National Institute of Open Schooling (NIOS) Book guidelines. These solutions are part of NIOS All Subject Solutions. Here we have given NIOS Class 12 Computer Science Textbook Solutions, NIOS Senior Secondary Course Computer Science Notes for All Chapter, You can practice these here.

Control Statements

Chapter: 14

Module – 3: Programming in C++

INTEXT QUESTIONS 14.1 

1. Identify the error(s), if any, in the following programs and write them in correct format. 

(a) # include<iostream.h>

Void main ( )

int a, b;

cin<<b;<<a;

if (a>b) max = a

}

Ans:

#include <iostream.h>

void main()
{
    int a, b, max;

    cin >> b >> a;

    if(a > b)
        max = a;

    cout << max;
}

(b) # include <iostream.h>

void main( ) {

int x, y;

cin >> x ; 

for (y = 0 ; y < 10, y ++) 

if x = = y cout << y + x ; 

else 

cout >> y; 

}

Ans:

#include <iostream.h>

void main()
{
    int x, y;

    cin >> x;

    for(y = 0; y < 10; y++)
    {
        if(x == y)
            cout << y + x;

        else
            cout << y;
    }
}

2. What will be the output of the following program segment?

(a) cin >> x; 

if ( x = = 10 ) 

cout << “x is 10” ; 

else

 cout << “x is not 10” ;

if the input given is 

(i) 11 

Ans:  x is not 10.

(ii) 10

Ans: x is 10.

(b) int year ; 

cin >> year ; 

if (year % 100 = = 0) 

if (year % 400 = = 0) 

{ 

cout << “Leap” ; 

else 

cout << “Not century year” ; 

}

if the input is 

(i) 2000 

Ans: Leap.

(ii) 1971

Ans: No output.

(c) int year ; 

cin >> year ; 

if (year % 100 = = 0) 

{ 

if (year % 400 = = 0) 

cout << “Leap” ; 

} 

else 
cout << “Not century year” ; 

if the input given is

(i) 2000 

Ans: Leap.

(ii) 1971

Ans: No century year.

3. What would be the value of c? 

{ 

int c; 

float a, b; 

a = 245.05; 

b = 40.02 ; 

c = a + b; 

}

(a) 285.09 

(b) 2850 

(c) 285 

(d) 285.0

Ans: (c) 285

4. What would be the value of i and k? 

{

 int i, j, k ; 

j = 5 ; i = 2 * j / 2 ; 

k = 2 * (j/2) ; 

}

(a) i = 4, k = 4 

(b) i = 4, k = 5 

(c) i = 5, k = 4 

(d) i = 5, k = 5

Ans: (c) i = 5, k = 4

5. What is the output of the following program? 

void main ( ) 

{

 int x = 5, y = 6, z = 7; 

if (x < y + z) 

cout << “Hello \n” ; 

else

{ 

cout << “How \n” ; 

cout << “Are you \n”; 

} 
}

(a) Hello

(b) How

(c) Are you

(d) None of the above

Ans: (a) Hello.

6. Consider the program segment. 

switch (choice)

{

case ‘W’ :               cout << “WHITE” ; 

case ‘R’ :                cout << “RED” ;

case ‘B’ :                cout << “BLUE” ;
default :                 cout << “error” ; break ;

}

What would be the output if choice = ‘R’? 

(a) RED 

(b) RED BLUE error 

(c) RED error 

(d) WHITE RED BLUE

Ans: (c) RED error .

INTEXT QUESTIONS 14.2 

1. How many times will the following loop be executed? 

(a) int s = 0, i = 0; 

while ( i + + < 5) 

s + = i;

Ans: 5 times.

(b) int s = 0 ;  i = 0; 

do 

s + = i ; 

while ( i < 5 ) ;

Ans: Endless loop.

2. What will be the output of the following program?

(a) # include <iostream.h>

void main ( ) 

{

long number = 7866372, result = 0 ; 

do

 { result * = 10 ; 
int digit = number % 10 ; 
result + = digit ; 

number / = 10 ; 

} 

while (number) ; 

cout << “output =” << result << endl;

}

Ans: output= 2 7 3 6 6 8 7.

(b) void main ( ) 

{ 

int i = 0, a = 0, b = 0, c = 0, f = 0 ; 

while ( i < = 5) 

{ 

switch (i + +) 

{ 

case 1 : case 2 : + + a ; break; 

case 3 : 

case 4 : + + b ;      break;

case 5 : + + c ;      break;

default : + + f ;      break;

} 

}

cout << a << “\n” ; 

cout << b << “\n” ; 

cout << c << “\n” ; 

cout << f << “\n” ; }

3. What will be the value of counter after the following program is executed?

void main ( )

{

int counter ;

int digit = 0 ;

counter = 1 ;

while (digit < = 10)

{

+ + counter ;

+ + digit ;

}

cout <<counter ;

}

(a) 9 

(b) 10

(c) 11 

(d) 12

Ans: (d) 12.