AP CSA Midterm Concept Review 1

What is the data type used to store a single character in Java?

• boolean

• char

• String

• int

Which of the following is not a valid data type in Java: int, float, string, char?

• string

• boolean

• long

• double

What is the size of the int data type in Java?

• 1 byte

• 4 bytes

• 8 bytes

• 2 bytes

What keyword is used to implement a conditional statement in Java?

• if

• else

• then

• maybe

Which of the following is not a control structure in Java: if-else, switch, for loop, function?

• if-else

• switch

• for loop

• function

What is the purpose of the 'this' keyword in Java?

• To refer to a different class

• To refer to the current instance of the class

• To access a static method

• To create a new instance of the class

What is the process of combining data and functions into a single unit called in object-oriented programming?

• Inheritance

• Abstraction

• Encapsulation

• Polymorphism

Which of the following is not a principle of object-oriented programming: inheritance, encapsulation, polymorphism, exception handling?

• encapsulation

• polymorphism

• inheritance

• exception handling

What is the purpose of the 'try' block in exception handling in Java?

• To execute the code only if an exception is thrown

• To enclose the code that may throw an exception.

• To skip the code that may throw an exception

• To print the exception message to the console

Which keyword is used to declare a variable that will be different for each instance of a class in Java?

• static variable

• global variable

• constant variable

• instance variable