12th Class Computer Science Chapter 12 Short Questions with Answers Online Preparation

Question # 1

What is sentinel controlled loop?

Ans 1: One way to do this is to instruct the user to enter a unique data value, called a sentinel value, after the last data item . The loop condition test s each data item and causes loop exit when the sentinel value is read. Choose the sentinel value is read.Choose the sentinel value carefully;
It must be a value that could not normally occur as data. The general form of a sentinel-controlled loop is;
1. Get the first line of data
2. While the sentinel value has not been encountered
3. Process the data line.
4. Get another line of data

Question # 2

Trace the output .
Int a =1;
While (a < =6)
{
printf("\n a=%d",a)
a+ =1;
}

Ans 1: Output: 1
2
3
4
5
6

Question # 3

Define nested loop.

Ans 1: Nested Loop: Nested loop mean a loop inside the body of another loop.Nesting can be done up to any level. But as the level of nesting increase, the complexity of the nested loop also increase . There is no instruction on the type of loops (while , do-while , or for ) that may be placed in the body of other loops.
Example: we can place one or more while or so-while loops in the body for the loop. Similarly, one or more for loops can be placed in the body of while or do -while loop.

Question # 4

Define While Loop.

Ans 1: The while loop keeps repeating associated statements until the specified condition becomes false. This is useful where the programmer does not know in advance how many times the loop will be traversed.The dyntax o the while statement is
While (condition)
}
statements(S);
}
The condition in the while loop controls iteration. The statements which are executed when the given condition is true,from the body of the loop. If the condition is true, the body of the loop is executed . As soon as it becomes false, the loop terminates immediately.

Question # 5

Define go to statement.

Ans 1: The go to statement performs an unconditional transfer of control to the name label.The label must be in the same function. A label is meaningful only to a goto statement: in any other context, the labeled statements is
Executed without regard to the label .
General Form: The general form of the goto statement is as follows:
Goto label:
.................,
Label: statement

Question # 6

Determine output of the following code segment.
Int n = 1;
Do
{
Printf("Pakistan\n");
N++;
} while (n<=4);

Ans 1: Output:
Pakistan
Pakistan
Pakistan
Pakistan

Question # 7

Write the syntax of do -while loop, both for single statement and for multiple statement .

Ans 1: Syntax for Single Statement and Multiple Statement :
Do
{
Statement(s);
} while (condition);

Question # 8

Convert the following code into while loop.
For (int i =1;i< =10;i ++)
{
Printf("\nPakistan");
}

Ans 1: Conversion:
Void main ( )
{
Int i =1;
While(i< =10)
{
Printf("%\n",I);
I =i+1;
}}

Question # 9

Rewrite the following code using do-while loop.
Int x= 10;
While (x> =1)
{ printf ("'%d", x%2);
x--;
}

Ans 1: Rewrite in do-while loop:
Void main ( )
{
Int x = 10;
Do
{
Printf("%d\n",x%2);
X=x-1;
}while (n>=1);
}

Question # 10

Define for Loop.

Ans 1: For Loop: The for statement is another way of implementing loops in C. Because of its flexibility, most programmers prefer the for statement to implements loops.
Syntax: The syntax of the for loops is as follows:
For (initialization expression: test condition;
increment/decrement expression)
{
Statement(s);
}

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ICS Part 2 Computer Science Chapter 12 Short Questions Test With Answer

Online Short Questions For Chapter 12 "ICS Part 2 Computer Science Chapter 12 Short Questions Preparation "

Computer Science - ICS Part 2 Computer Science Chapter 12 Short Questions Preparation

What is sentinel controlled loop?

Trace the output .Int a =1;While (a < =6){ printf("\n a=%d",a) a+ =1;}

Define nested loop.

Define While Loop.

Define go to statement.

Determine output of the following code segment.Int n = 1;Do{Printf("Pakistan\n");N++;} while (n<=4);

Write the syntax of do -while loop, both for single statement and for multiple statement .

Convert the following code into while loop.For (int i =1;i< =10;i ++){Printf("\nPakistan");}

Rewrite the following code using do-while loop.Int x= 10;While (x> =1){ printf ("'%d", x%2); x--;}

Define for Loop.

Prepare Complete Set Wise Questions For Chapter 12 "ICS Part 2 Computer Science Chapter 12 Short Questions Preparation "

Set 1

Set 2

ICS Part 2 Computer Science Chapter 12 Short Questions Preparation - Set 1

What is sentinel controlled loop?

Trace the output .Int a =1;While (a < =6){ printf("\n a=%d",a) a+ =1;}

Define nested loop.

Define While Loop.

Define go to statement.

Determine output of the following code segment.Int n = 1;Do{Printf("Pakistan\n");N++;} while (n<=4);

Write the syntax of do -while loop, both for single statement and for multiple statement .

Convert the following code into while loop.For (int i =1;i< =10;i ++){Printf("\nPakistan");}

Rewrite the following code using do-while loop.Int x= 10;While (x> =1){ printf ("'%d", x%2); x--;}

Define for Loop.

ICS Part 2 Computer Science Chapter 12 Short Questions Preparation - Set 2

Write Output.Int x= 5, y= 3;Do{X= x *2;Y = y+2;}While (y<7);Printf("%d",x);

Determine output of the following code segment.Int n = 1;Do{Printf("Pakistan\n");N++;} while (n<=4);

Convert while into do-while.Int i =1;While (I <=15){printf( "/n",1); I = i+1;}

Convert the following loop Code into for loop code.i= 3;Do{Printf ("%d/n",i); I + =3;}While (i < =21);

Write the output of the following program fragments.N= 0;While (n<=4){Printf ("%3d %3d \n", n,10=n);N + +;}

Write any two uses of loop.

Trace the erros of the following code.Void main( ){Int x, y= 5;For (x= 0; x < 3;x ++)If (y > =5)Print f ("%s\t",x);}

Trace the output.Int I, j =10;For (I = 1; i< =5; i + +){ Printf("\nPakistan");}

Show output.Int m;For (m =0; m> = 0; + +)Printf("%d\t",m);

Rewrite the following code using do-while loop.Int x= 10;While (x> =1){ printf ("'%d", x%2); x--;}

12th Computer Science Chapter 12 Preparation

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Trace the output .
Int a =1;
While (a < =6)
{
printf("\n a=%d",a)
a+ =1;
}

Determine output of the following code segment.
Int n = 1;
Do
{
Printf("Pakistan\n");
N++;
} while (n<=4);

Convert the following code into while loop.
For (int i =1;i< =10;i ++)
{
Printf("\nPakistan");
}

Rewrite the following code using do-while loop.
Int x= 10;
While (x> =1)
{ printf ("'%d", x%2);
x--;
}

Trace the output .
Int a =1;
While (a < =6)
{
printf("\n a=%d",a)
a+ =1;
}

Determine output of the following code segment.
Int n = 1;
Do
{
Printf("Pakistan\n");
N++;
} while (n<=4);

Convert the following code into while loop.
For (int i =1;i< =10;i ++)
{
Printf("\nPakistan");
}

Rewrite the following code using do-while loop.
Int x= 10;
While (x> =1)
{ printf ("'%d", x%2);
x--;
}

Write Output.
Int x= 5, y= 3;
Do
{
X= x *2;
Y = y+2;
}
While (y<7);
Printf("%d",x);

Determine output of the following code segment.
Int n = 1;
Do
{
Printf("Pakistan\n");
N++;
} while (n<=4);

Convert while into do-while.

Int i =1;
While (I <=15)
{printf( "/n",1);
I = i+1;}

Convert the following loop Code into for loop code.
i= 3;
Do
{
Printf ("%d/n",i);
I + =3;
}
While (i < =21);

Write the output of the following program fragments.
N= 0;
While (n<=4)
{
Printf ("%3d %3d \n", n,10=n);
N + +;
}

Trace the erros of the following code.
Void main( )
{
Int x, y= 5;
For (x= 0; x < 3;x ++)
If (y > =5)
Print f ("%s\t",x);
}

Trace the output.
Int I, j =10;
For (I = 1; i< =5; i + +)
{
Printf("\nPakistan");
}

Show output.
Int m;
For (m =0; m> = 0; + +)
Printf("%d\t",m);

Rewrite the following code using do-while loop.
Int x= 10;
While (x> =1)
{ printf ("'%d", x%2);
x--;
}