Quiz on C Programming

Who is the father of C Language?

• Bjarne Stroustrup

• James A. Gosling

• Dennis Ritchie

• Dr. E.F. Codd

Answer explanation

Dennis Ritchie is recognized as the father of the C Language, having developed it in the early 1970s at Bell Labs. Bjarne Stroustrup created C++, James A. Gosling is known for Java, and Dr. E.F. Codd is famous for relational databases.

Why is C considered a foundational programming language?

• It was the first language to support object-oriented programming.

• It provides low-level access to memory and system resources.

• It was developed as a successor to the A language.

• It is the only language that can be used for system programming.

• It has a simple syntax that is easy for beginners to learn.

Answer explanation

C is considered foundational because it provides low-level access to memory and system resources, allowing programmers to write efficient code and interact closely with hardware, which is essential for system programming.

Which of the following is an invalid variable name in C?

• myVariable

• 2ndVariable

• _variable

• varName

• var-name

Answer explanation

In C, variable names cannot start with a digit. Therefore, '2ndVariable' is invalid. The other options are valid as they start with a letter or underscore.

Which of the following are C preprocessors?

• ##define

• #define

• $define

• all of the mentioned

Answer explanation

For a 16-bit computer, integers are typically represented using 16 bits, allowing for a range from -32768 to 32767. This is the correct choice, as the other options either exceed or do not fit within this range.

Standard ANSI C recognizes number of keywords?

• 30

• 32

• 24

• 36

Answer explanation

Standard ANSI C recognizes 32 keywords, which include control structures, data types, and other essential components of the language. Therefore, the correct answer is 32.

What is sizeof in 'C' ?

• Operator

• Reserved Keyword

• Both (a) and (b)

• Function

Answer explanation

In C, 'sizeof' is an operator that returns the size of a data type or object in bytes. It is also considered a reserved keyword in the language, making 'Both (a) and (b)' the correct choice.

A C variable cannot start with

• Number

• special symbol other than underscore

• both a and b

• alphabet

Answer explanation

A C variable cannot start with a number or a special symbol other than an underscore. Therefore, the correct answer is 'both a and b', as both conditions are not allowed for variable names.

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

• conio.h

• stdlib.h

• stdio.h

• string.h

Answer explanation

The header file defines input/output function prototypes in C, such as printf and scanf, which are essential for handling standard input and output operations.

What is the size of 'int' in bytes?

• 2

• 4

• 8

• 1

Answer explanation

The size of 'int' in bytes can vary by system, but on most modern architectures, it is 4 bytes. This is why the correct answer is 4, as it is the standard size for an integer in languages like C and Java.

C programs are converted into machine language with the help of

• Editor

• compiler

• operating system

• none of these

Answer explanation

C programs are converted into machine language by a compiler, which translates the high-level code into machine code that the computer can execute. The other options do not perform this function.