AP COMP SCI A: CodeHS Units 6/7/8 VOCAB

What is an Array in Java?

• A data structure that can hold multiple values of the same type.

• A method to store key-value pairs.

• A function to iterate over a collection.

• A class to create objects.

What is an Index in the context of Java Arrays?

• A unique identifier for each element in the array

• The size of the array

• The data type of the array

• The memory address of the array

What does array.length return in Java?

• The number of elements in the array

• The size of the array in bytes

• The last index of the array

• The memory address of the array

The purpose of array[index] in Java is to:

• Access the element at the specified index

• Change the size of the array

• Sort the array

• Delete the element at the specified index

What are ArrayLists in Java?

• A type of array that can grow in size

• A fixed-size array

• A type of linked list

• A type of stack

What are ArrayList Methods used for in Java?

• To store elements in a dynamic array

• To perform mathematical calculations

• To handle file input/output operations

• To manage network connections

What is an Enhanced For Loop in Java?

• A loop that iterates over a range of numbers

• A loop that iterates over elements of an array or collection

• A loop that runs indefinitely

• A loop that executes a specific number of times

What is a common error that occurs when attempting to modify an ArrayList while using an enhanced for loop?

• ConcurrentModificationException

• NullPointerException

• IndexOutOfBoundsException

• ClassCastException

The process of traversing an ArrayList is:

• Iterating through each element using a loop

• Accessing elements randomly

• Sorting the elements

• Reversing the elements

What is an algorithm?

• A step-by-step procedure for solving a problem or accomplishing a task.

• A type of computer hardware.

• A programming language.

• A software application.