Data Types in C Language - Quiz

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
Remarks:

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: 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

Correct Option: C
Remarks:

Explanation:

char has lesser bytes than int and int has lesser bytes than double in any system

Option C is correct with respect to the size of the datatypes in the C programming language. The char data type typically has a size of 1 byte, the int data type typically has a size of 4 bytes, and the double data type typically has a size of 8 bytes. Therefore, char < int < double in terms of size. However, it's worth noting that the size of these data types can vary depending on the specific implementation and architecture of the system being used.

In C language, data types can be arranged based on their size in bytes. Here's a common arrangement from smallest to largest:

char: Typically 1 byte.
short: Usually 2 bytes.
int: Generally 4 bytes.
float: Usually 4 bytes.
long: Typically 4 bytes on 32-bit systems and 8 bytes on 64-bit systems.
double: Usually 8 bytes.
long long: Typically 8 bytes.
long double: Can vary, often 10 or 16 bytes.

Please note that the actual size of these data types might vary depending on the compiler and system architecture.

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
Remarks:

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 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

Correct Option: C
Remarks:

Explanation:

Output on Turbo C++ 3.0:

8 4 2

Output on Turbo C++ 4.5:

8 4 2

Output on Linux GCC:

8 4 4

Output on Visual C++:

8 4 4

By default data type of numeric constants is:

6.5 : double

90000: long int

'A': char

In C size of data type varies from compiler to compiler.

Q:

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

Correct Option: C
Remarks:

Explanation:

Output of Turbo C++ 3.0: 10 65526 0 0

10 65526 0 0

Turbo C ++4.5: 10 65526 0 0

10 65526 0 0

Linux GCC: 10 4294967286 0 0

10 4294967286 0 0

Visual C++: 10 4294967286 0 0

10 4294967286 0 0

a=(signed)10u;

signed value of 10u is +10

so, a=10

b=(unsigned)-10;

unsigned value of -10 is :

MAX_VALUE_OF_UNSIGNED_INT – 10 + 1

In turbo c 3.0 complier max value of unsigned int is 65535

So, b = 65526

y = (signed)10u + (unsigned)-10;

= 10 + 65526 = 65536 = 0 (Since 65536 is beyond the range of unsigned int. zero is its corresponding cyclic vlaue)

X = y = 0

Q: Which of the following is the correct default value of a Boolean type? / The default value of a boolean variable is:

B. 1
C. True
D. False

Correct Option: D
Remarks:

Explanation:

False is the correct default value of a Boolean type.

The default value of a boolean variable in Java:

In Java, if you declare a boolean instance variable (not local variable) and do not initialize it, its default value is false. ✅
False and True (capitalized) are not valid in Java.
0 is an integer, not boolean.

Answer: false

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
Remarks:

Explanation:

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

Q: Which of the following is NOT an Integer?

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

Correct Option: B
Remarks:

Explanation:

Char is NOT an Integer.

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

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

Correct Option: D
Remarks:

Explanation: 4th

Q: 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

Correct Option: B
Remarks:

Explanation: Run in 6b-bit machine
20 Press any key to continue . . .

Data Types in C Language - Quiz

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

Which is correct with respect to the size of the datatypes?

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

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; }

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; }

Which of the following is the correct default value of a Boolean type? / The default value of a boolean variable is:

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; }

Which of the following is NOT an Integer?

Among the following which one is not a valid identifier?

What would be the output of the following program? #include<stdio.h> int x = 40 ; void main() { int x = 20 ; printf("\n%d ",x); }

What is the output of the following C code?

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

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

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

What would be the output of the following program?