C Fundamental 2

• ✅ dos.h
• ✅ math.h
• ✅ stdio.h

Explanation:

"math.h" is a header file employed to execute mathematical functions within the C programming language's library.

7) What are the various types of real data type in C language?

• ✅ long double, short int
• ✅ float, long double
• ✅ short int, double, long int, float
• ✅ float, double, long double

Explanation:

Floating data type is known as real data type.

There are three types of floating data type:

• ✅ float with storage size of 4 byte
• ✅ long double with storage size of 10 byte
• ✅ double with storage size of 8 byte

8) The statement used for printing \n on the screen is:

• ✅ printf("");
• ✅ printf('\n');
• ✅ printf("\\n");
• ✅ printf("n\");

Explanation:

In the C programming language, the "\n" escape sequence is utilized to represent a new line character when printing text. When the statement printf("\\n"); is executed, the backslash "\" symbol will be printed as "\" and the letter "n" will be displayed as a regular character.

9) Which of the following are declarations?

• ✅ float square (float x){?}
• ✅ double pow(double, double);
• ✅ extern int x;

Options available include:

• ✅ Alternatives 1 and 3
• ✅ Choices 1 and 2

Explanation:

The declaration "double pow(double, double);" represents a function prototype for the pow function.

The instruction "extern int x;" declares a variable x as external.

Hence, number 1 and 3 represent declarations, while 2 signifies a definition.

10) Which header file is used to define input/output functions, macros and prototypes?

• ✅ memory.h
• ✅ math.h
• ✅ dos.h
• ✅ stdio.h

Explanation:

The header file stdio.h is utilized to declare macros, variables, and a variety of functions for executing input and output tasks in the C programming language.