C++ Data Types Quiz
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C++ Data Types Quiz

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Questions and Answers

Which data type is used to store decimal values in C++?

  • char
  • float (correct)
  • bool
  • int

    • What is the memory requirement for an integer data type in C++?

  • 4 bytes (correct)
  • 2 bytes
  • 16 bytes
  • 8 bytes

    • What is the range of values that a character data type can hold?

  • -32768 to 32767
  • -128 to 127 or 0 to 255 (correct)
  • 0 to 255 or -256 to 255
  • 1 to 100

    • Which keyword is used for declaring double-precision floating-point values?

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

    Which of the following is used to indicate a valueless entity in C++?

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

    What type of data does the Boolean data type store?

    <p>Logical values</p> Signup and view all the answers

    How many bytes does a double floating-point variable typically occupy?

    <p>8 bytes</p> Signup and view all the answers

    Which character data type indicates a size greater than the normal character type?

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

    Which data type in C++ is specifically used to represent a true or false value?

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

    What does the keyword 'void' represent in C++?

    <p>A type of variable that doesn't store any value</p> Signup and view all the answers

    How many bytes of memory does a wide character data type typically require?

    <p>2 or 4 bytes</p> Signup and view all the answers

    Which data type in C++ is used for storing a single character?

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

    Which of the following keywords is used for defining a floating-point variable in C++?

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

    What is the range of values that a standard integer data type can hold?

    <p>-2147483648 to 2147483647</p> Signup and view all the answers

    Which of the following data types requires the most memory in C++?

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

    Which keyword is associated with derived data types in C++?

    <p>All of the above</p> Signup and view all the answers

    Study Notes

    Data Types in C++

    • Data types specify the size and type of values to be stored.
    • Data types are used to tell variables the type of data they can store.
    • The compiler allocates memory for variables based on their data type.

    Primary/Built-in/Fundamental Data Types

    • Integer (int): Used for whole numbers.

      • Requires 4 bytes of memory.
      • Range: -2,147,483,648 to 2,147,483,647

    • Floating Point (float): Used for single-precision decimal values.

      • Requires 4 bytes of memory.
      • Example: float area = 64.74;

    • Double Floating Point (double): Used for double-precision decimal values (more precise than float).

      • Requires 8 bytes of memory.
      • Example: double volume = 134.64534;

    • Character (char): Used for storing single characters.

      • Requires 1 byte of memory.
      • Range: -128 to 127 or 0 to 255.
      • Example: char test = 'h';

    • Boolean (bool): Used for storing logical values (true or false).

      • Example: bool cond = false;

    • Void (void): Represents a valueless entity.

      • Used for functions that don't return a value.
      • You can't declare variables of type void.

    • Wide Character (wchar_t): Used for storing characters that require more than 8 bits.

      • Typically 2 or 4 bytes long.
      • Example: wchar_t i = L'b';

    C++ Data Types

    • Data types in C++ specify the size and type of values stored in variables.
    • They tell the compiler how much memory to allocate for variables.
    • Different data types require different amounts of memory.

    Primary or Built-in Data Types

    • Integer (int): Used for whole numbers. Requires 4 bytes of memory and ranges from -2,147,483,648 to 2,147,483,647. Example: int salary = 85000;
    • Floating Point (float): Used for single-precision decimal values. Requires 4 bytes of memory. Example: float area = 64.74;
    • Double Floating Point (double): Used for double-precision decimal values (higher precision than float). Requires 8 bytes of memory. Example: double volume = 134.64534;
    • Character (char): Used for storing single characters. Requires 1 byte of memory and can represent ASCII characters (range: -128 to 127 or 0 to 255). Example: char test = 'h';
    • Boolean (bool): Used for storing logical values (true or false). Example: bool cond = false;
    • Void (void): Represents a valueless entity. Used for functions that do not return a value. Note: You cannot declare variables of type void.
    • Wide Character (wchar_t): Used for storing characters that require more than 8 bits of memory. Typically 2 or 4 bytes long. Example: wchar_t i = L'b';

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    Related Documents

    PPS Unit 2 Notes.docx.pdf

    Description

    Test your knowledge on the various data types used in C++. This quiz covers fundamental data types such as integers, floating points, characters, and booleans, along with their memory requirements and ranges. Perfect for beginners and those looking to refresh their understanding of C++ data structures.

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