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?

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

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

    <p>Returns the size of a variable or data type in bytes</p> Signup and view all the answers

    What are some primitive data types supported in C?

    <p>int, char, float, double, bool</p> Signup and view all the answers

    What is the purpose of initializing a variable in C?

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

    How do you define a boolean variable in C?

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

    What are the naming rules for variables in C?

    <p>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.</p> Signup and view all the answers

    Explain the concept of variable scope in C.

    <p>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 {}).</p> Signup and view all the answers

    What are the three categories of variable lifetime in C?

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

    Why is initializing a variable important in C programming?

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

    How can you convert a variable from one type to another in C?

    <p>To convert a variable from one type to another in C, you can use a cast operator <code>(data_type)</code>.</p> Signup and view all the answers

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