mentor hr quiz

What does the 'sizeof' operator in C return?

• Memory address

• Size of a variable or data type

• ASCII value

• ASCII value

In C programming, what is the purpose of the 'volatile' keyword?

• Indicate that a variable is constant

• Declare a variable as global

• Specify that a variable may be changed at any time

• Define a macro

What will be the output of the following code?

• 5

• 6

• 4

• Compiler Error

How is dynamic memory allocated in C?

• malloc()

• calloc()

• realloc()

• All of the above

Which header file is needed to use the rand() function in C?

• <math.h>

• <stdlib.h>

• <stdio.h>

• <time.h>

What is the purpose of the #define directive in C?

• Declare a constant variable

• Define a function

• Include a header file

• Create a macro

What is the purpose of the enum keyword in C?

• Declare a constant variable

• Define a structure

• Define an exponential number

• Define a set of named integer constants

Answer explanation

The enum keyword in C is used to define an enumeration type, which consists of a set of named integer constants.

What is the output of this code?

• 25

• 11

• 14

• Compiler Error

Answer explanation

The macro SQUARE(2 + 3) is expanded to 2 + 3*2 + 3, which is equivalent to 2 + 6 + 3. Therefore, the result is 11.

What is the output of this code?

• 7

• 5

• 3

• Compiler Error

Answer explanation

The macro MAX(5, 7) is expanded to ((5 > 7) ? 5 : 7), which is 7. Then, MAX(3, 7) is expanded to ((3 > 7) ? 3 : 7), which is 7. Therefore, the result is 7.

In C, what does the term "lvalue" refer to?

• A constant value

• A left-hand side expression

• A literal value

• A long integer value