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CMSC 132 Exam 2 Review Quiz

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Questions and Answers

What is a subtype of Object[]?

MyClass

ArrayList

String[] (correct)

Chicken[]

What does the notation 'public MyClass' indicate?

Usage of a wildcard

Usage of a generic type inside the class (correct)

An interface implementation

Extension of the Object class

What can be used to avoid an ArrayStoreException?

Using an ArrayList instead of an array (correct)

Using a wildcard

Extending the Object class

Implementing an interface

Which type of list is a subtype of ArrayList?

<p>LinkedList</p> Signup and view all the answers

What does the wildcard notation 'ArrayList<? extends Chicken>' represent?

<p>Any type that extends Chicken</p> Signup and view all the answers

Study Notes

Subtypes of Arrays

Object[] is a supertype, and its subtypes can be arrays of specific classes or interfaces.

Class Access Modifiers

The notation 'public MyClass' indicates that the class MyClass has public access, meaning it can be accessed from anywhere.

Avoiding ArrayStoreException

Using generics or parameterized types can be used to avoid an ArrayStoreException, which is thrown when trying to store the wrong type of object into an array of objects.

Subtypes of ArrayList

LinkedList is a subtype of ArrayList, which means it inherits the properties and methods of ArrayList.

Wildcard Notation in Generics

The wildcard notation 'ArrayList<? extends Chicken>' represents a list that can hold any type of object that is a subclass of Chicken, but not a superclass of Chicken.

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Description

Prepare for your CMSC 132 Exam 2 with this review notes quiz by Andy Yu. Topics include parameterized types, deadlock, Big-O notation, and subtype relationships. Get 6 free points with an announcement. Sharpen your understanding of generic notation and interface extension for a comprehensive exam overview.