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C Programming Language Basics Quiz

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Questions and Answers

What is the purpose of the 'printf' function in C programming?

To declare a variable

To print formatted output to the standard output (usually the console) (correct)

To read input from the user

To store the result of a mathematical operation

What is the primary purpose of a header file in C programming?

To define the main function of the program

To declare functions and macros for use in multiple source files (correct)

To handle exceptions and errors in the program

To specify the input and output for the program

What is a variable in C?

A container that stores values temporarily.

How do you declare a variable in C?

By using the <code>data_type variable_name;</code> syntax. Signup and view all the answers

In C programming, what does the 'sizeof' operator do?

Returns the size of a variable or data type in bytes (C) Signup and view all the answers

What are some primitive data types supported in C?

int, char, float, double, bool Signup and view all the answers

What is the purpose of initializing a variable in C?

To assign an initial value to the variable when it is declared. Signup and view all the answers

How do you define a boolean variable in C?

By using the <code>bool</code> data type (C99/C11) and assigning it a value of <code>true</code> or <code>false</code>. Signup and view all the answers

What are the naming rules for variables in C?

Use only lowercase letters (except for C99/C11 <code>_</code> and <code>$</code> as part of the identifier), avoid using reserved keywords, begin with a letter or underscore, and limit names to 31 characters. Signup and view all the answers

Explain the concept of variable scope in C.

Variable scope refers to the portion of the program where a variable is accessible. In C, variables can have local scope (inside a function) or block scope (inside a block enclosed by curly braces {}). Signup and view all the answers

What are the three categories of variable lifetime in C?

The three categories of variable lifetime in C are automatic, static, and allocated. Signup and view all the answers

Why is initializing a variable important in C programming?

Initializing a variable is important to prevent it from having an indeterminate value, which can lead to unexpected behavior. Signup and view all the answers