Data Types in C Language - Quiz

Q: 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

Correct Option: D
Explanation:

Output:

98.000000

Since the ASCII value of b is 98, the same is assigned to the float variable and printed.

This code is a C language program that includes the standard input/output library and defines the main function.

Within the main function, there is a declaration of a float variable x which is assigned the ASCII value of character 'b'.

The printf statement is then used to print the value of the x variable as a floating-point number using the %f format specifier.

Since the ASCII value of 'b' is 98, the output of the program will be 98.000000.

Finally, the main function returns an integer value of 0 to signify that the program has executed successfully.

Q: 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

Correct Option: A
Explanation: Option A

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

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

Correct Option: D
Explanation:

Since the size of the structure depends on its fields, it has a variable size.

Q: 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

Correct Option: D
Explanation:

65000 comes in the range of short (16-bit) which occupies the least memory. Signed short ranges from -32768 to 32767 and hence we should use unsigned short.

Q: 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

Correct Option: D
Explanation:

We cannot predict the value of volatile variable because its value can be changed by any microprocessor interrupt.

Q: 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

Correct Option: D
Explanation:

Temperature in Fahrenheit is 37.00

Q: 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;

Correct Option: B
Explanation:

pi = 3.14F; It doesn't declare the data type.

const float pi = 3.14F; is the correct Answer. It declare constant datatype.

const pi; pi = 3.14F; Here data type doesn't declare.

float pi = 3.14F; pi is a floating-point variable but not a constant.

Q: 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

Correct Option: A
Explanation:

Output:

-56

Q: 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

Correct Option: B
Explanation:

Output:

Since the size of a union is the size of its maximum datatype, here int is the largest hence 4.

Q: 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

Correct Option: B
Explanation:

Output

equal

0.1f results in 0.1 to be stored in floating point representations.

Data Types in C Language - Quiz

What is the output of the following C code? #include <stdio.h> int main() { float x = 'b'; printf("%f", x); return 0; }

What is the output of this C code? #include<stdio.h> void main() { char a='\012'; printf("%d",a); }

Which of the datatypes have size that is variable?

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

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; }

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; }

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

What is the output of this C code? #include <stdio.h> int main() { signed char chr; chr = 200; printf("%d\n", chr); return 0; }

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; }

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"); }

What is the output of the following C code?

What is the output of this C code?

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

What is the Output of this program?

What is the output of this C code?

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

What is the output of this C code?