Variable Introduction in C - Quiz

Which of the following is a valid variable name declaration?

Aint ;a5;
Bint _a4;
Cint #a6;
Dint @a2;

Which of the following is not a valid variable name declaration?

Aint a;
Bint a_5;
Cint _g;
Dint 6_d;

In case of ordinary int variables

Ano bit is reserved for sign
Brightmost bit is reserved for sign
Cleftmost bit is reserved for sign
DNone

C programs are converted from high level to machine level language with the help of

AOS
BEditor
CCompiler
DNone

Which of following is not a valid name for a C variable?

Anewdelhi
Bnew_delhi
Cnew delhi
Dnone

Which one is not a c keyword

Aauto
Bextern
Cregister
Dmain

What will be the output of the following program?

 #include"stdio.h"
main()
{
/* assuming that the i is not defined in in any other file */	
 extern int i;
 i = 10 ;
 printf("%d", i) ;
}

A10
CCompile time error
DLinker Error

What would be the output of the following program?

#include  
void main()
{
   extern int i;
   i =20;
   printf("sizeof(i)");
}

A2
B4
Cwould vary from compiler to coompiler
Dundefined reference to `i'

Which keyword is used to declare a variable in C language?

Aint
Bvar
Cvari
Ddeclare

What is the maximum length of a variable name in C language?

A8 characters
B16 characters
C32 characters
DThere is no limit

Results:
🟢 Correct Answers: 🔴 Wrong Answers:

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Variable Introduction in C - Quiz

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Q: Which of the following is a valid variable name declaration?

A. int ;a5;
B. int _a4;
C. int #a6;
D. int @a2;

Correct Option: B
Remarks:

Explanation:

Variable name can start with only two special characters, which are _(underscore) and $(doller).

Q: Which of the following is not a valid variable name declaration?

A. int a;
B. int a_5;
C. int _g;
D. int 6_d;

Correct Option: D
Remarks:

Explanation:

Variable name cannot start with a digit.

Q: In case of ordinary int variables

A. no bit is reserved for sign
B. rightmost bit is reserved for sign
C. leftmost bit is reserved for sign
D. None

Correct Option: C
Remarks:

Explanation:

In case of ordinary int variables leftmost bit is reserved for sign.

Q: C programs are converted from high level to machine level language with the help of

A. OS
B. Editor
C. Compiler
D. None

Correct Option: C
Remarks:

Explanation:

C programs are converted from high level to machine level language with the help of Compiler.

Compiler: A compiler is a software program that transforms high-level source code that is written by a developer in a high-level programming language into a low-level object code (binary code) in machine language, which can be understood by the processor. The process of converting high-level programming into machine language is known as compilation.

Q: Which of following is not a valid name for a C variable?

A. newdelhi
B. new_delhi
C. new delhi
D. none

Correct Option: C
Remarks:

Explanation:

new delhi is not a valid name for a C variable, because of space.

Q: Which one is not a c keyword

A. auto
B. extern
C. register
D. main

Correct Option: D
Remarks:

Explanation: main

Q: What will be the output of the following program?

 #include"stdio.h"
main()
{
/* assuming that the i is not defined in in any other file */	
 extern int i;
 i = 10 ;
 printf("%d", i) ;
}

A. 10
C. Compile time error
D. Linker Error

Correct Option: D
Remarks:

Explanation: Linker Error
Undefined symbol 'i'

Q: What would be the output of the following program?

#include  
void main()
{
   extern int i;
   i =20;
   printf("sizeof(i)");
}

A. 2
B. 4
C. would vary from compiler to coompiler
D. undefined reference to `i'

Correct Option: D
Remarks:

Explanation: Error: undefined reference to `i'

Q: Which keyword is used to declare a variable in C language?

A. int
B. var
C. vari
D. declare

Correct Option: A
Remarks:

Explanation:

Answer: a) int

Explanation: The keyword "int" is used to declare a variable in C language for integer data types. For example, "int x;" declares a variable named x of integer type.

Q: What is the maximum length of a variable name in C language?

A. 8 characters
B. 16 characters
C. 32 characters
D. There is no limit

Correct Option: D
Remarks:

Explanation:

Answer: d) There is no limit

Explanation: There is no specific limit on the length of a variable name in C language. However, it is recommended to keep the variable names short and meaningful.

Variable Introduction in C - Quiz

Which of the following is a valid variable name declaration?

Which of the following is not a valid variable name declaration?

In case of ordinary int variables

C programs are converted from high level to machine level language with the help of

Which of following is not a valid name for a C variable?

Which one is not a c keyword

What will be the output of the following program?
#include"stdio.h" main() { /* assuming that the i is not defined in in any other file */ extern int i; i = 10 ; printf("%d", i) ; }

What would be the output of the following program?
#include void main() { extern int i; i =20; printf("sizeof(i)"); }

Which keyword is used to declare a variable in C language?

What is the maximum length of a variable name in C language?

Variable Introduction in C - Quiz

Which of the following is a valid variable name declaration?

Which of the following is not a valid variable name declaration?

In case of ordinary int variables

C programs are converted from high level to machine level language with the help of

Which of following is not a valid name for a C variable?

Which one is not a c keyword

What will be the output of the following program? #include"stdio.h" main() { /* assuming that the i is not defined in in any other file */ extern int i; i = 10 ; printf("%d", i) ; }

What would be the output of the following program? #include void main() { extern int i; i =20; printf("sizeof(i)"); }

Which keyword is used to declare a variable in C language?

What is the maximum length of a variable name in C language?

What will be the output of the following program?
#include"stdio.h" main() { /* assuming that the i is not defined in in any other file */ extern int i; i = 10 ; printf("%d", i) ; }

What would be the output of the following program?
#include void main() { extern int i; i =20; printf("sizeof(i)"); }