C Programming MCQ Data Types and Sizes Set-1

1. Comment on the output of this C code?

#include
int main()
{
float f1 = 0.1;
if (f1 == 0.1)
printf(“equal\n”);
else
printf(“not equal\n”);
}
a) equal
b) not equal
c) output depends on compiler
d) none of the mentioned

2. Comment on the output of this C 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(“FAIL\n”);
}
a) The compiler will flag an error
b) Program will compile and print the output 5
c) Program will compile and print the ASCII value of 5
d) Program will compile and print FAIL for 5 times

3.The format identifier ‘%i’ is also used for _____ data type?
a) char
b) int
c) float
d) double

4.Which is correct with respect to size of the datatypes?
a) char > int > float
b) int > char > float
c) char < int < double
d) double > char > int

5. Which data type is most suitable for storing a number 65000 in a 32-bit system?
a) signed short
b) unsigned short
c) long
d) int

6.Which of the datatypes have size that is variable?
a) int
b) struct
c) float
d) double

6.What is the size of an int data type?
a) 4 Bytes
b) 8 Bytes
c) Depends on the system/compiler
d) Cannot be determined

7.What is short int in C programming?
a) Basic datatype of C
b) Qualifier
c) Short is the qualifier and int is the basic datatype
d) All of the mentioned

8.Which of the following is a User-defined data type?
a) typedef int Boolean;
b) typedef enum {Mon, Tue, Wed, Thu, Fri} Workdays;
c) struct {char name[10], int age};
d) all of the mentioned

9. What is the output of this C code?

#include <stdio.h>
int main()
{
float x = ‘a’;
printf(“%f”, x);
return 0;
}
a) a
b) run time error
c) a.0000000
d) 97.000000

10. What is the output of this C code?

#include <stdio.h>
int main()
{
signed char chr;
chr = 128;
printf(“%d\n”, chr);
return 0;
}
a) 128
b) -128
c) Depends on the compiler
d) None of the mentioned