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Arrays Review: Single Dimension and Multi-Dimensional Arrays

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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?

datatype[] arrayRefVar = new datatype[arraySize]; (A) Signup and view all the answers

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

15 (A) Signup and view all the answers

Which statement about array initializers is correct?

Array initializers must be declared, created, and initialized in one statement to avoid syntax errors. (A) Signup and view all the answers

How are array subscripts accessed in Java?

Array subscripts can be accessed using variables like loop counters. (B) Signup and view all the answers

What is the correct range for array indexes in Java?

Indexes start at 0 and go up to one less than the size of the array. (D) Signup and view all the answers

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

Being off-by-one when accessing arrays. (D) Signup and view all the answers

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

i, j, k (D) Signup and view all the answers

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

It must declare, create, and initialize the array in one statement. (C) Signup and view all the answers