C Programming Language

Data Types in C Language

⛪ Programming Language > C Programming Language

This MCQ quiz tests your knowledge of data types in the C programming language. Test your understanding of the different types of data, such as integers, floats, and characters, and how they are used in C programming. ➲ Data Types in C Language - Quiz

Q 1: Which of the following is not a valid declaration in C?

1. short int x;

2. signed short x;

3. short x;

4. unsigned short x;

  • A 1
  • B 2
  • C 3 and 4
  • D All

Q 2: What is the Output of this program? 

#include <stdio.h>
int main()
{
   float c = 5.0;
   printf ("Temperature in Fahrenheit is %.2f", (9/5)*c + 32);
   return 0;
}

  • A Temperature in Fahrenheit is 31.00
  • B Temperature in Fahrenheit is 46.00
  • C Temperature in Fahrenheit is 40.00
  • D Temperature in Fahrenheit is 37.00

Q 3: What is the output of this code? 

#include <stdio.h>
int main()
 {
  int a[5] = {1, 2, 3, 4, 5};
  int i;
    for (i = 0; i < 5; i++)
          if ((char)a[i] == '5')
             printf("%d\n", a[i]);
          else
             printf("ATNYLA\n");
 }

  • A Program will compile and print the output ATNYLA
  • B Program will compile and print ATNYLA for 5 times
  • C Program will compile and print the ASCII value of ATNYLA
  • D The compiler will flag an error

Q 4: Which of the datatypes have size that is variable?

  • A Array
  • B Structure
  • C Union
  • D All

Q 5: Which data type is most suitable for storing a number 65000 in a 32-bit system?

  • A Unsigned short
  • B Long
  • C Int
  • D Signed short

Q 6: What is the size of an int data type in a 32-bit system?

  • A 4 Bytes
  • B 8 Bytes
  • C 2 Bytes
  • D Depends on the system/compiler

Q 7: What is the output of this C code? 

#include <stdio.h>
int main()
 {
  signed char chr;
  chr = 200;
  printf("%d\n", chr);
  return 0;
 }

  • A -56
  • B 200
  • C -200
  • D Depends on the computer

Q 8: What is the output of this C Program? 

#include <stdio.h>
int main()
 {
  float f1 = 0.1;
  if (f1 == 0.1)
    printf("equal\n");
  else
    printf("not equal\n");
 }

  • A not equal
  • B equal
  • C Output depends on compiler
  • D None of the mentioned

Q 9: What is the output of this C code? 

#include <stdio.h>
int main()
 {
  float f1 = 0.1;
  if (f1 == 0.1f)
  printf("equal\n");
  else
  printf("not equal\n");
 }

  • A not equal
  • B equal
  • C Output depends on compiler
  • D None of the mentioned

Q 10: Which is correct with respect to the size of the datatypes?

  • A char > int > float
  • B int > char > float
  • C char < int < double
  • D double > char > int

Q 11: What is the output of the following C code on a 64 bit machine? 

#include <stdio.h>
union Sti
 {
  int nu;
  char m;
 };
  int main()
   {
    union Sti s;
    printf("%d", sizeof(s));
    return 0;
   }

  • A 5
  • B 4
  • C 8
  • D 9

Q 12: What is the output of the following C code?

#include <stdio.h>
int main()
 {
   float x = 'b';
   printf("%f", x);
   return 0;
 }

  • A b
  • B b.0000000
  • C run time error
  • D 98.000000

Q 13: What will be output when you will execute following c code on a 64-bit machine? 
 
#include<stdio.h>
int main(){
    int a= sizeof(signed) +sizeof(unsigned);
   printf("%d",a);
    return 0;
}

  • A 10
  • B 9
  • C 8
  • D Cannot find size of modifiers

Q 14: What will be output when you will execute following c code on a 32-bit machine? 

#include<stdio.h>
int main(){
    int b=sizeof(const)+sizeof(volatile);
    printf("%d",b);
    return 0;
}

  • A 8
  • B 4
  • C 16
  • D 32

Q 15: Which of the following is not modifier of data type in c?

  • A extern
  • B interrupt
  • C huge
  • D All

Q 16: What will be output when you will execute following c code? 

#include<stdio.h>
int main(){
    printf("%d\t",sizeof(6.5));
    printf("%d\t",sizeof(90000));
    printf("%d",sizeof('A'));
    return 0;
}

  • A 4 4 1
  • B 16 8 4
  • C 8 4 2
  • D 4 2 1

Q 17:

What will be output when you will execute following c code?


 #include<stdio.h>
  int main(){
    signed x;
    unsigned y;
    x = 10 +- 10u + 10u +- 10;
    y = x;
    if(x==y)
         printf("%d %d",x,y);
    else if(x!=y)
         printf("%u  %u",x,y);
    return 0;
}

  • A 65536 -10
  • B 0 65536
  • C 0 0
  • D Compilation error

Q 18:

What will be output when you will execute following c code?


#include<stdio.h>
   int main(){
    signed x,a;
    unsigned y,b;
    a=(signed)10u;
    b=(unsigned)-10;
    y = (signed)10u + (unsigned)-10;
    x = y;
    printf("%d  %u\t",a,b);
    if(x==y)
         printf("%d %d",x,y);
    else if(x!=y)
         printf("%u  %u",x,y);
    return 0;
}

  • A 10 4294967286 0 0
  • B 10 65526 0 0
  • C A and B
  • D None

Q 19: Suppose a C program has floating constant 2.76, what's the best way to convert this as "float" data type?

  • A (float)2.76
  • B 2.76f or 2.76F
  • C 2.76 itself of "float" data type i.e. nothing else required.
  • D float(2.76)

Q 20: Which of the following is the correct default value of a Boolean type?

  • A 0
  • B 1
  • C True
  • D False

Q 21: Which of the following is the correct way to set a value 3.14 in a variable pi such that it cannot be modified?

  • A pi = 3.14F;
  • B const float pi = 3.14F;
  • C const pi; pi = 3.14F;
  • D float pi = 3.14F;

Q 22: What will be output when you will execute following c code? 

#include<stdio.h>
int main(){
    volatile int x=34;
    printf("%d",x);
    return 0;
}

  • A 34
  • B Garbage
  • C Compilation error
  • D We cannot predict

Q 23: Which of the following does not store a sign?

  • A Short
  • B Integer
  • C Long
  • D Byte

Q 24: What is the output of this program? 

#include <stdio.h>
int main()
{
    if (sizeof(int) > -1)
        printf("Yes");
    else
        printf("No");
    return 0;
}

  • A No
  • B Yes
  • C Compile time error
  • D Run time Error

Q 25: What is the size of a Decimal number in 64-bit?

  • A 4 byte
  • B 8 byte
  • C 16 byte
  • D 32 byte

Q 26: Which of the following is NOT an Integer?

  • A Byte
  • B Char
  • C Integer
  • D Short

Q 27: Which of the following is not derived data type in c?

  • A Pointer
  • B Enumeration
  • C Function
  • D Array

Q 28: Which one is a modifier in data type?

  • A sign
  • B unsign
  • C long
  • D All

Q 29: What is short int in C programming?

  • A short is the qualifier and int is the basic datatype
  • B All are Qualifier
  • C Basic data type of C
  • D All of the mentioned.

Q 30: What is the output of this C code? 
#include"stdio.h"
void main()
 {
  1 < 2 ? return 1: return 2;
 }

  • A Run time error
  • B Varies
  • C -5
  • D 5

Q 31: What is the output of this C code? 

#include<stdio.h> 
void main()
{
   char a='\012';
   printf("%d",a);
 
}

  • A 10
  • B 11
  • C 12
  • D 012

Q 32: Among the following which one is not a valid identifier?

  • A Y12
  • B Sum_1
  • C _temperature
  • D 4th

Q 33: What would be the output of the following program? 

#include<stdio.h> 
 int x = 40 ;
void main()
{

    int x = 20 ;
    printf("\n%d ",x);
}

  • A 21
  • B 20
  • C 22
  • D no output

Q 34: What would be the output of the following program? 

#include<stdio.h> 

void main()
{
    int x = 40 ;
    {
    int x = 20 ;
    printf("\n%d ",x);
    }
    printf("%d ",x);
}

  • A 40 20
  • B 21 40
  • C 20 40
  • D 20 41

Q 35: Which of the following is a Scalar Data type

  • A Float
  • B Union
  • C Array
  • D Pointer

Q 36: Character constants should be enclosed between ___

  • A Single quotes
  • B Double quotes
  • C Both a and
  • D None of these