Java Quiz

Answer 10 questions and see how you score!

Enter Your Name

1. Which method triggers garbage collection?

System.gc()

Runtime.gc()

gc()

collect()

2. Which keyword ensures visibility between threads?

volatile

final

static

synchronized

3. What is autoboxing?

Automatic conversion of primitive to wrapper

Wrapper to primitive

Manual conversion

Object casting

4. Which collection sorts elements automatically?

TreeSet

HashSet

LinkedHashSet

Set

5. Which memory model ensures consistency?

Java Memory Model

Thread Model

CPU Model

Heap Model

6. Which method starts a thread?

start()

run()

begin()

init()

7. Which method creates a new thread?

start()

run()

begin()

init()

8. Which operator is used for addition?

+

-

*

/

9. Which keyword skips current loop iteration?

continue

skip

pass

next

10. Which interface allows sorting logic?

Comparator

Serializable

Iterable

Cloneable