C Programming Quiz

What does the following C statement mean?

scanf("%4s", str);

• Read exactly 4 characters from console.

• Read maximum 4 characters from console.

• Read a string str in multiples of 4

• Nothing

Which of the following is true?

• gets() doesn't do any array bound testing and should not be used.

• fgets() should be used in place of gets() only for files, otherwise gets() is fine

• gets() cannot read strings with spaces

• None of the above

If n has 3, then the statement a[++n]=n++;

• assigns 3 to a[5]

• assigns 4 to a[5]

• assigns 4 to a[4]

• what is assigned is compiler dependent

Which of the following is not a logical operator?

• &&

• !

• ||

• |

#include int main(){

int i = 65000;

while (i++ != 0)

printf("%d", i); return 0;

}

• Infinite Loop

• 0

• 1

• Run Time Error

Which of the following operators can be applied on structure variables?

• Equality comparison ( == )

• Assignment ( = )

• Both of the above

• None of the above

#include “stdio.h”

#include “stdio.h”

#include “stdio.h”

int main() {

printf(“Whether this statement would be printed?”)

return 0;

}

• TRUE

• FALSE

Which of the following is true about arrays in C?

• For every type T, there can be an array of T.

• For every type T except void and function type, there can be an array of T.

• When an array is passed to a function, C compiler creates a copy of array.

• 2D arrays are stored in column major form

In C, parameters are always

• Passed by value

• Passed by reference

• Non-pointer variables are passed by value and pointers are passed by reference

• Passed by value result

We can make a class abstract by

• Declaring it abstract using the virtual keyword

• Making at least one member function as virtual function

• Making at least one member function as pure virtual function

• Making all member function const