C Programming Language

Variable in C Language

⛪ Programming Language > C Programming Language

This page contains multiple choice questions (MCQs) on the topic of Variables in C Language. Test your knowledge and understanding of the concept of variables in C Language with these MCQs.

➲ Variable in C Language - Quiz

Q 1: Which of the following is a valid variable name declaration?

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

Q 2: 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;

Q 3: All keywords in C are in

  • A UpperCase letters
  • B LowerCase letters
  • C CamelCase letters
  • D None

Q 4: 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

Q 5: Which of the following below is valid C keywords?

  • A null
  • B integer
  • C int
  • D None

Q 6: C programs are converted from high level to machine level language with the help of

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

Q 7: Which of the following is not a variable type?

  • A int
  • B float
  • C char
  • D real

Q 8: Which of the following is correct for variable names in C?

  • A Variable names cannot start with a digit
  • B They can contain alphanumeric characters as well as special characters
  • C Variable can be of any length
  • D It is not an error to declare a variable to be one of the keywords(like goto, static)

Q 9: Which of the following is not a valid variable name declaration?

  • A #define PI 3.14
  • B float PI = 3.14;
  • C double PI = 3.14;
  • D int PI = 3.14;

Q 10: Which of following is not a valid name for a C variable?

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

Q 11: Which one is not a c keyword

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

Q 12: 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
  • B 0
  • C Compile time error
  • D Linker Error

Q 13: 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'

Q 14: Which keyword is used to declare a variable in C language?

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

Q 15: 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

Q 16: Which symbol is used for the assignment of a value to a variable in C language?

  • A ===
  • B ==
  • C =>
  • D =