printf() and scanf() | C Programming Questions and Answers | C Programming Free Online-Tests | LucentBlackBoard

01.

What is the output of the following code?
#include "stdio.h"
extern int a;
main(){
printf("\na=%d",a);
return 0;
}

A.	a=0	B.	a=garbage value
C.	error	D.	none of these

Answer and Explanation

Answer: error

Explanation:
Linking undefined symbol.

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02.

What is the output of the following code?
#include "stdio.h"
int a;
main(){
printf("\n a= %d",a);
return 0;
}

A.	a=0	B.	a=garbage value
C.	error	D.	none of these

Answer and Explanation

Answer: a=0

Explanation:
There is no explanation...

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03.

What is the output of the following code?
#include "stdio.h"
extern int a;
main(){
printf("\n a=%d",a);
return 0;
}
int a;

A.	a=0	B.	error
C.	nothing display on screen	D.	none of these

Answer and Explanation

Answer: a=0

Explanation:
There is no explanation...

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04.

What is the output of the following code?
#include "stdio.h"
extern int a;
main(){
printf("\n a=%d",a);
return 0;
}
int a=5;

A.	a=0	B.	a=5
C.	a=garbage value	D.	error

Answer and Explanation

Answer: a=5

Explanation:
There is no explanation...

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05.

What is the output of the following code?
void main(){
printf("%d%d%d",50,100);
}

A.	50,100	B.	50,100,garbage
C.	50,100,0	D.	0,50,100

Answer and Explanation

Answer: 50,100,garbage

Explanation:
There is no explanation...

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06.

What is the output of the following program?
void main(){
a=3.5;
printf("%d",a);

A.	3.5	B.	3
C.	error	D.	garbage

Answer and Explanation

Answer: error

Explanation:
There is no explanation...

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07.

What is the output of the following program?
void main(){
printf("%d%d",100,200,300);
}

A.	100 200	B.	200 300
C.	300 200	D.	100 200 300

Answer and Explanation

Answer: 100 200

Explanation:
There is no explanation...

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08.

What will be the output of the following program?
main()
{
printf(3+â??Gyantonicâ??+4);
}

A.	ntonic	B.	tonic
C.	ic	D.	nic

Answer and Explanation

Answer: ic

Explanation:
Gyantonic is a constant string and statement printf(3+â??Gyantonicâ??+4); will skip seven(3 + 4) characters of the string before printing.

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09.

What is the output of the following program?
void main(){
int a;
a=3+5*5+3;
printf("%d",a);
}

A.	43	B.	64
C.	31	D.	none of these

Answer and Explanation

Answer: 31

Explanation:
There is no explanation...

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10.

What is the output of following program?
void main(){
printf("%d%d",47%5,47%-5);
printf("%d%d%d",-47%5,-47%-5,5%7);
}

A.	2, -2, -2, -2, 5	B.	2,2,-2,-2,5
C.	2,-2,2,-2,5	D.	2,2,-2,-2,0

Answer and Explanation

Answer: 2,2,-2,-2,5

Explanation:
There is no explanation...

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