AP Computer Science A Quiz

What are the primitive data types in Java?

• boolean, byte, short, int, long, float, double, char

• boolean, byte, short, int, long, float, double, char, object

• boolean, byte, short, int, long, float, double, char, string

• boolean, byte, short, int, long, float, double, char, void

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What is the difference between int and double data types in Java?

• The main difference between int and double data types in Java is their size.

• The main difference between int and double data types in Java is their precision.

• The main difference between int and double data types in Java is their syntax.

• The main difference between int and double data types in Java is their range.

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How do you declare a variable of type boolean in Java?

• boolean variableName

• boolean variable

• bool variable

• boolean var

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What are the three control structures in Java?

• If, Else, For

• Sequential, Selection, Iteration

• Try, Catch, Finally

• Conditional, Looping, Switch

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What is the purpose of the if statement in Java?

• The purpose of the if statement in Java is to declare a variable.

• The purpose of the if statement in Java is to perform mathematical calculations.

• The purpose of the if statement in Java is to repeat a block of code a certain number of times.

• The purpose of the if statement in Java is to perform a conditional execution of a block of code.

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How do you write a for loop in Java?

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What is an array in Java?

• An array in Java is a data structure that allows you to store multiple values of different types in a single variable.

• An array in Java is a method used to perform mathematical calculations.

• An array in Java is a data structure that allows you to store multiple values of the same type in a single variable.

• An array in Java is a keyword used to declare a variable.

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How do you declare and initialize an array in Java?

• int numbers = new int[5];

• int[] numbers = {1, 2, 3, 4, 5};

• int[] numbers = new int[] {1, 2, 3, 4, 5};

• int[] numbers = new int[5];

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What is the difference between an array and an ArrayList in Java?

• An array is a dynamic-size data structure that can store elements of different types, while an ArrayList is a static-size data structure that can store elements of different types.

• An array is a data structure that can store elements of different types, while an ArrayList is a data structure that can only store elements of the same type.

• An array is a dynamic-size data structure that can store elements of different types, while an ArrayList is a fixed-size data structure that stores elements of the same type.

• An array is a fixed-size data structure that stores elements of the same type, while an ArrayList is a dynamic-size data structure that can store elements of different types.

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What is object-oriented programming?

• Object-oriented programming is a programming paradigm that does not support code reusability.

• Object-oriented programming is a programming paradigm that uses only functions and procedures.

• Object-oriented programming is a programming paradigm that focuses on procedural programming.

• Object-oriented programming is a programming paradigm that organizes data and behavior into reusable structures called objects.

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