Arrays Review: Single Dimension and Multi-Dimensional Arrays
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Questions and Answers

What is the index of the last element in an array?

  • 2n
  • n-1 (correct)
  • n
  • n+1
  • How are array elements accessed in Java?

  • arrayName(index) (correct)
  • index[arrayName]
  • index.arrayName
  • arrayName.index
  • What happens when an array is created in Java?

  • Elements must be assigned manually
  • Elements are assigned random values
  • Elements are automatically initialized to 0 (correct)
  • Elements are initialized to 'A'
  • What is the correct syntax to declare and create an array in Java in a single step?

    <p>datatype[] arrayRefVar = new datatype[arraySize];</p> Signup and view all the answers

    What does myList.length return if myList has 15 elements?

    <p>15</p> Signup and view all the answers

    Which statement about array initializers is correct?

    <p>Array initializers must be declared, created, and initialized in one statement to avoid syntax errors.</p> Signup and view all the answers

    How are array subscripts accessed in Java?

    <p>Array subscripts can be accessed using variables like loop counters.</p> Signup and view all the answers

    What is the correct range for array indexes in Java?

    <p>Indexes start at 0 and go up to one less than the size of the array.</p> Signup and view all the answers

    What is a common mistake that can occur when accessing arrays?

    <p>Being off-by-one when accessing arrays.</p> Signup and view all the answers

    What variable names are commonly used as counting variables in for loops?

    <p>i, j, k</p> Signup and view all the answers

    What is a key feature of the shorthand syntax for array initialization?

    <p>It must declare, create, and initialize the array in one statement.</p> Signup and view all the answers

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