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UNIT 7 ARRAY LIST PART 1 APCSA

Quiz by Mr Le

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10 questions
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  • Q1
    What is the primary use of ArrayList in Java?
    To create a single element object.
    To store a collection of reference data types.
    To store data in a linear file structure.
    To store a fixed-size collection of primitive data types.
    30s
  • Q2
    What is one key difference between arrays and ArrayLists?
    Arrays are only used for numeric data.
    ArrayLists can change size after creation, while arrays cannot.
    Arrays can store more data types than ArrayLists.
    ArrayLists are faster than arrays.
    30s
  • Q3
    Which data type can NOT be directly stored in an ArrayList?
    Objects
    Primitive data types like int.
    Strings
    Boolean values
    30s
  • Q4
    How do you add an element to the end of an ArrayList?
    Using the `add` method without an index parameter.
    Using the `set` method.
    Using the `add` method with an index.
    Using the `insert` method.
    30s
  • Q5
    What method would you use to remove an element from an ArrayList?
    The `delete` method.
    The `discard` method.
    The `remove` method.
    The `removeAt` method.
    30s
  • Q6
    What is the function of the `get` method in an ArrayList?
    To find the location of an element.
    To add a new element to the list.
    To count the number of elements in the list.
    To retrieve an element at a specified index.
    30s
  • Q7
    If you want to change the value of an existing element in an ArrayList, which method do you use?
    The `set` method.
    The `replace` method.
    The `update` method.
    The `add` method.
    30s
  • Q8
    Which of the following methods returns the number of elements in an ArrayList?
    The `total` method.
    The `count` method.
    The `size` method.
    The `length` method.
    30s
  • Q9
    To traverse an ArrayList and access each element, which loop structure is typically recommended?
    A for loop with the index based on `list.size()`.
    A while loop without conditions.
    A for-each loop.
    A do-while loop.
    30s
  • Q10
    What is the purpose of the constructor when creating an ArrayList?
    To add elements automatically.
    To initialize a new ArrayList object.
    To define the maximum size of the ArrayList.
    To create a copy of an existing ArrayList.
    30s

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