Week 17 — What are the differences between int and Integer in Java

Week 16 — What is StringBuilder class in Java, and what are it's possible uses

Week 15 — What are Varargs in Java?

Week 14 — What are records in Java

Week 13 — What is the purpose of the final keyword?

Week 12 — What is an Exception?

Week 11 — What are the difference (and similarities) between Set, List & Map?

Week 10 — What are the main uses of the super keyword?

Week 9 — What is the (purpose of the) Scanner class?

Week 8 — How would you implement the insert sort sorting algorithm in Java?

Week 7 — What is meant by polymorphism?

Week 6 — What is the object-oriented paradigm?

Week 5 — What are method handles?

Week 4 — What is meant by recursion?

Week 3 — What is constructor chaining?

Week 2 — What is meant by serialization?