APCSA Unit 3 Quiz

How can I store multiple related values without creating multiple variables?

• By using a loop

• By using an array

• By using a function

• By using a single variable

What is a data structure used for?

• Organizing, processing, retrieving, and storing data

• Performing arithmetic operations

• Enhancing the visual appearance of text

• Managing computer hardware resources

What is a one-dimensional (1D) array?

• A data structure that holds multiple values of different types

• A programming language for creating websites

• A data structure that holds a single value

• A data structure that holds multiple values of the same type

What is an element in the context of data structures?

• A) A command in a programming language

• B) A single value or object in a data structure

• C) A type of data structure

• D) A function that manipulates data

Which of the following is the correct syntax for declaring a one-dimensional array in Java?

• int scores[]

• int scores

• int[] scores

• int (scores)

When declaring an array in Java, what is the purpose of specifying the type of data (e.g., int) before the variable name?

• To determine the size of the array

• To specify the type of elements the array will hold

• To initialize the array with default values

• To define the number of elements in the array

What is the correct syntax to initialize a 1D array in Java with 5 elements of integer type?

• int scores = new int[5];

• int[] scores = new int[5];

• int scores[] = new int 5;

• int scores = new int(5);

Which keyword is used in Java to allocate memory for an array?

• alloc

• malloc

• new

• create

If an array is named 'scores' and contains the values 85, 93, 78, 97, and 73, what value is stored at index 3?

• 78

• 93

• 97

• 73

What is the default value for an int type element in a newly initialized array in Java?

• 1

• null

• 0

• -1