Practice Default Constructor (3.3.1) - Constructors

Practise this section

10 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is a default constructor?
Show hintHide hint
Think about how it's used when creating an object.
Question 2.
In the Student class, what value is assigned to age by the default constructor?
Show hintHide hint
Check the Java code example for values.
3Question 3.
What does a default constructor do?
- It takes parameters
- It has no parameters
- It returns a value
Show hintHide hint
Think about how you would define such a constructor.
4Question 4.
True or False: Every class in Java requires at least one constructor.
- True
- False
Show hintHide hint
What happens if you define other types of constructors?
Question 5.
Create a class named 'Book' with a default constructor that initializes title to 'Unknown' and author to 'Anonymous'. Demonstrate its usage by creating an instance.
Show hintHide hint
Think about how the constructor initializes object attributes.
Question 6.
Explain how creating multiple objects of a class using a default constructor can lead to unique instances despite sharing a common initial value.
Show hintHide hint
Consider the implications of object-oriented design.

6 more questions in this section. Enroll free to practise them all.