APCSA Unit 5.1- 5.4 Review

What is the difference between static and instance methods in Java?

• Static methods can access instance variables directly

• Instance methods can be called without creating an object

• Static methods belong to the class, while instance methods belong to objects

• Instance methods cannot access static variables

Which of the following is a correct way to define a getter method for a private variable `int age`?

• `public int getAge() { return age; }`

• `private int getAge() { return age; }`

• `public void getAge() { return age; }`

• `int getAge() { return age; }`

Which of the following statements about Java class structure is true?

• A Java class can have multiple public classes

• A Java class can have multiple constructors

• A Java class cannot have any methods

• A Java class must have a main method

What is the purpose of setter methods in Java?

• To retrieve the value of a private variable

• To set the value of a private variable

• To initialize the class

• To override methods

Which of the following is true about static methods in Java?

• They can be overridden

• They can access instance variables directly

• They can be called without creating an instance of the class

• They must be declared as final

Which of the following is a valid reason to use method overriding in Java?

• To increase the number of parameters a method can accept

• To provide a specific implementation of a method that is already defined in its superclass

• To change the return type of a method

• To create a new method with the same name

What is the result of trying to access a private member of a class from outside the class?

• The member will be accessible

• A compile-time error will occur

• The member will be accessible only if it is static

• The member will be accessible only if it is final

Which of the following is a characteristic of instance methods in Java?

• They can be called without an object

• They can access both static and instance variables

• They must be declared as static

• They cannot be overridden

Which tag is used in JavaDoc to describe a method's parameter?

• @return

• @param

• @throws

• @see

How can you generate Java documentation from JavaDoc comments?

• By using the 'javac' command

• By using the 'java' command

• By using the 'javadoc' command

• By using the 'jar' command