C-Programming Basics

Which of the following correctly shows the hierarchy of arithmetic operations in C?

• / + * -

• * - / +

• + - / *

• / * + -

To print out 'a' as an integer and 'b' as a decimal, which of the following printf() statement will you use?

• printf("%f %lf", a, b)

• printf("%f %f", a, b)

• printf("%d %f", a, b)

• printf("%f %d", a, b)

Which of the following is not logical operator?

• &

• &&

• ||

• !

When does the code block following while(x<100) execute?

• When x is less than one hundred

• When x is greater than one hundred

• When x is equal to one hundred

• while it wishes

Input/output function prototypes and macros are defined in which header file?

• conio.h

• stdlib.h

• stdio.h

• dos.h

What is the output of this C code?

#include <stdio.h>

int main()

{

printf("Hello World! %d \n", x);

return 0;

}

• Hello World! x;

• Hello World! followed by a junk value

• Compile time error

• Hello World!

Which of the following is not a correct variable type?

• int

• real

• float

• char

Which of the following is the correct operator to compare two variables?

• equal

• =

• :=

• ==

What is the correct value to return to the operating system upon the successful completion of a program?

• 1

• 0

• -1

• program do not return a value

What is the only function all C programs must contain?

• start()

• system()

• main()

• Program()