Ap CSA Unit 6 review

Which data type would be most appropriate for storing a true or false value

• string

• int

• boolean

• double

Which keyword is used to create a new instance of an array in Java

• def

• new

• class

• struct

To access the first element in an array named "data", which index would you use

• data[-1]

• data[0]

• data[1]

• data[first]

How is information hidden inside a Java class encapsulated

• by using private access modifiers

• by declaring static meathods

• by implementing interfaces

• by creating abstract classes

What happens when an array is created using the keyword new?

• Elements are initialized with random values

• Elements are initialized to 1

• Elements are initialized based on their data type

• Elements are initialized to null

Which of the following is true regarding array indices?

• Index values start from 1 and go up to the size of the array

• Index values start from 0 and go up to one less than the size of the array

• Index values are negative integers

• Index values are not used in arrays

What exception is thrown if an attempt is made to access an index outside the valid range of an array?

• ArrayOutOfBoundsException

• IndexOutOfRangeException

• ArrayIndexOutOfBoundsException

• nvalidIndexException

What is the purpose of the enhanced for loop (for each loop) when iterating over arrays?

• It iterates through each element without specifying an index variable

• It replaces the need for loops

• It allows manipulation of array indices

• It prints out the size of the array

Which of the following is NOT a task that can be performed using arrays?

• Searching for an element

• Finding the maximum value

• Calculating the sum of elements

• Creating duplicate elements