Day 3 C Programming quiz

Which conversion is not possible in c programming?

• int to float

• float to char pointer

• float to int

• All of these

Which header file is needed to include to use typecasting?

• stdin.h

• math.h

• ctype.h

• None

#include<stdio.h>

int main()

{

double x = 1.2;

int sum = (int)x + 1;

printf("sum = %d", sum);

return 0;

}

what will be the value of the variable sum?

• 1

• 2

• 3

• 0

Which type of conversion is also called Automatic Type Conversion?

• Implicit Type Conversion

• Explicit Type Conversion

• None of the above

• Both A and B

#include <stdio.h>

int main()

{

int a=40,b=20;

if (a>b) {

printf("a is greater than b");}

else if(a<b) {

printf("a is less than b"); }

else {

printf("a is equal to b");}

}

What is the output of the code?

• a is greater than b

• a is equal to b

• a is less than b

• compilation error

int main()

{

switch(24.5)

{

case 24.5: printf("A ");break;

case 25.0: printf("B "); break;

default: printf("None ");

}

printf("Done");

}

What is the output of the above C Program?

• Compiler error

• Done

• A , Done

• B , Done

#include <stdio.h>

int main()

{

int x = 5;

if (x < 1)

printf("x<1");

if (x == 5)

printf("x=5");

else

printf("none");

}

what is the output of the following code?

• x=5

• x<1

• none

• error

Why can typecasting be dangerous in some cases?

• Some conversions are not defined, such as char to int.

• You might temporarily lose part of the data - such as truncating a float when typecasting to an int.

• You might permanently change the value of the variable.

• There are no dangers in typecasting.

#include<stdio.h>

int main()

{

int i = 2;

if(i == (1, 2))

printf("1 or 2");

else

printf("None");

return 0;

}

what will be the output of above programme?

• Compilation error

• 1 or 2

• None

• Run time error

Which is a good use for typecasting?

• To allow your program to use nothing but integers.

• To change the return type of a function.

• To allow the division of two integers to return a decimal value.

• To swap variables rapidly.