AP Computer Science A Flashcards: Array Creation and Access
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 10 cards to help you master important concepts.
What is an 'index' in the context of an array?
An index is the numerical position used within square brackets $[ ]$ to specify a particular element in an array for access or modification.
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What is an 'index' in the context of an array?
An index is the numerical position used within square brackets $[ ]$ to specify a particular element in an array for access or modification.
What symbols are used to access and modify an element in a 1D array?
Square brackets $[ ]$ are used with an index to access and modify a specific element in a 1D array.
How does the use of the 'new' keyword relate to an array's initialization?
Using the 'new' keyword is the mechanism that creates the array object and triggers the automatic initialization of all its elements to their default values.
If you create a new array of booleans (boolean[]), what will be the initial value of each element?
Each element will be initialized to the default value for the boolean data type, which is false.
What is a key characteristic of an array's length once it has been created?
The length of an array is established at the time of creation and cannot be changed afterwards.
What are the two fundamental properties of an array established at the time of its creation?
The two properties established at creation are its data type (which must be uniform for all elements) and its length (which cannot be changed).
What is a one-dimensional (1D) array?
A 1D array is an object used to represent and store a collection of multiple values of the same data type.
What is the main constraint on the data types that can be stored in a single array?
An array can only store multiple values of the same type; it cannot mix different data types.
Why is an array considered a way to represent collections of *related* data?
Arrays represent related data because they group multiple values of the same type under a single variable name, implying a relationship between the elements.
What happens to the elements of an array when it is instantiated using the 'new' keyword?
When an array is created using the keyword 'new', all of its elements are initialized to the default values for the element's data type.