Java - Introduction to Arrays

Why are arrays used in programming?

• To store multiple values in a single variable

• To perform complex mathematical operations

• To enhance the speed of the processor

• To reduce the usage of memory

What does an array store?

• A fixed number of elements of the same type

• A variable number of elements of the same type

• Different types of elements randomly

• A fixed number of elements of different types

How do you create a new integer array with five elements?

• int scores = new int[5];

• int scores[] = new int[5];

• int[] scores = new int[5];

• int[] scores = new int(5);

How can you initialize an array with specific values?

• Arrays cannot be initialized with specific values

• By specifying values at the time of declaration

• Using a for loop to assign values

• Using a special method called initialize

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

• 1

• 0

• It varies

• -1

How do you access the third element in an array named 'scores'?

• scores[3]

• scores[2]

• scores(2)

• scores.get(2)

What is the default value of an int array element?

• 1

• null

• -1

• 0

What is the default value of a String array element?

• null

• undefined

• ""

• "null"

How do you find the length of an array named 'arr'?

• arr.length

• arr.length()

• arr.getSize()

• arr.size

What is the last index of an array with 5 elements?

• It depends on the array

• 5

• 4

• 6