Arrays in C++
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Questions and Answers

What is the purpose of the name of an array in an array declaration?

  • To initialize the array with default values
  • To indicate the size of the array
  • To give a reference to the array (correct)
  • To specify the data type of the array

    • How do you access individual elements of an array?

  • Using the {} operator
  • Using the () operator
  • Using the dot operator
  • Using the [] operator (correct)

    • What happens when you try to access an element outside the bounds of an array?

  • The program will terminate abruptly
  • The program will continue executing normally
  • The program will overwrite adjacent memory
  • The program will throw a runtime error (correct)

    • How do you initialize an array with values?

    <p>Using the {} operator</p> Signup and view all the answers

    What is the convention for naming constants in Google Style?

    <p>Starting with k followed by uppercase letters</p> Signup and view all the answers

    What is the function of the dereference operator?

    <p>To access the value stored at a memory location</p> Signup and view all the answers

    What is the relationship between pointers and arrays?

    <p>Arrays and pointers are interchangeable</p> Signup and view all the answers

    What is the purpose of the reference operator (&) in pointer declaration?

    <p>To get the memory address of a variable</p> Signup and view all the answers

    What is a common use of pointers?

    <p>To implement dynamic memory allocation</p> Signup and view all the answers

    What is a key difference between pointers and arrays?

    <p>Pointers can be reassigned, arrays cannot</p> Signup and view all the answers

    Study Notes

    Arrays

    • An array is a constant variable, and its name should begin with 'k' according to Google Style.
    • Arrays can hold different types of values.
    • Arrays are initialized with a list of values enclosed in curly braces {}.
    • Individual elements in an array can be accessed using the [] operator.
    • If you try to access an element outside the array's bounds, it will result in overstepping bounds.
    • The name of an array gives the memory address of the first element.
    • Example of array declaration: int x = { 3, 7, 2 };

    Arrays

    • Size of an array is a constant variable, following Google Style, and should begin with k.
    • Arrays can hold different types of values.
    • Arrays can be initialized using a list enclosed in curly braces {}.
    • Individual elements of an array can be accessed using the [] operator.
    • Accessing an array element outside its bounds is called overstepping bounds.
    • The name of an array is a pointer to the first element of the array.

    Pointers

    • To declare a pointer, the asterisk symbol * is used.
    • Pointers can point to variables, arrays, or functions.
    • There is a close relationship between pointers and arrays, with the name of an array being a pointer to its first element.
    • The &amp; symbol is the reference operator, used to get the memory address of a variable.
    • The * symbol, when used as the dereference operator, retrieves the value stored at a memory address.

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    Description

    This quiz covers the basics of arrays in C++ including definition, size, initialization, and accessing individual elements.

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