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]; (A)</p> Signup and view all the answers

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

<p>15 (A)</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. (A)</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. (B)</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. (D)</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. (D)</p> Signup and view all the answers

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

<p>i, j, k (D)</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. (C)</p> Signup and view all the answers

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