Java Placement Quiz

Naveen AnamaneniUpdated Nov 14, 2026 · 4 min read

easyJava 25java quiz placement assessment

Before a music teacher starts lessons with a new student, they usually ask them to play a few short pieces. Ten minutes later the teacher knows whether to begin with scales, polish what the student already plays, or go straight to the hard pieces. This quiz does the same for Java. Answer the 10 questions below, submit, and you will get a suggested track with a link to where you should start. It takes about five minutes.

The Three Tracks

This course is written once but can be read in three ways.

Track	Who it suits	How to use the course
Learn	Students, career switchers and anyone new to Java	Go lesson by lesson from the start, doing every practice task
Refresh	Developers who know Java, often from the Java 8 days	Catch up on modern Java first, then the topics interviews ask most
Deep Dive	Experienced engineers who want to know why Java behaves as it does	Read the JVM, memory, concurrency and performance lessons in depth

The Quiz

Questions 1 to 4 check the basics, 5 to 7 everyday Java, and 8 to 10 advanced topics.

Java placement quiz

10 questions

1What does System.out.println(10 / 4); print?

2.522.03

2Given String s1 = "hi"; and String s2 = new String("hi");, what is s1 == s2?

truefalseA compile errorIt depends on the JVM

3Which keyword stops a method from being overridden?

staticprivate onlyfinalconst

4Which map keeps its keys in sorted order?

HashMapTreeMapLinkedHashMapHashtable

5If you override equals(), which other method must you also override?

toString()compareTo()hashCode()clone()

6What happens when you run List.of(1, 2, 3).add(4);?

The list becomes [1, 2, 3, 4]A compile errorAn UnsupportedOperationException is thrownIt returns false

7What does the compiler generate for record Point(int x, int y) {}?

Only a constructorGetters and settersA constructor, accessors x() and y(), equals, hashCode and toStringNothing; records are interfaces

8What does volatile guarantee for a field?

That count++ is atomicThat writes are visible to other threadsMutual exclusion, like a lockThat the JIT never optimizes the field in any way

9What is the main benefit of virtual threads?

CPU-heavy code runs fasterBlocking I/O code can run on millions of cheap threadsThey replace synchronizedThey never need a carrier thread

10What does Stream.of(1, 2, 3).peek(System.out::print); print?

1231 2 3Nothing[1, 2, 3]

Show answers

2: Dividing two int values gives an int, so the fraction is dropped. Revise: Java Operators.
false: new always creates a new object, and == compares references, not text. Revise: String Comparison in Java.
final: A final method can't be overridden by a subclass. Revise: Java Final Keyword.
TreeMap: TreeMap is a red-black tree sorted by key. Revise: TreeMap in Java.
hashCode(): Equal objects must have equal hash codes, or HashMap and HashSet stop working. Revise: Object Equality and Hash Codes in Java.
An UnsupportedOperationException is thrown: List.of returns an unmodifiable list. Revise: Immutable Collections in Java.
A constructor, accessors x() and y(), equals, hashCode and toString: Records generate all of these for you. Revise: Records in Java.
That writes are visible to other threads: volatile gives visibility and ordering, not atomicity. Revise: Volatile Keyword in Java.
Blocking I/O code can run on millions of cheap threads: Virtual threads make blocking cheap; they don't speed up CPU work. Revise: Virtual Threads in Java.
Nothing: Streams are lazy: without a terminal operation, nothing runs. Revise: Lazy Evaluation and Short-Circuiting in Streams.

What Your Score Means

Score	Track	Where to start
0 to 4	Learn	What Is Java, then every lesson in order
5 to 7	Refresh	Java 9 to 11 Features, then the modern Java lessons and the topics interviews ask most
8 to 10	Deep Dive	JVM Architecture Overview, then memory, bytecode, collections internals and concurrency

Was this tutorial helpful?

The Three Tracks

The Quiz

What Your Score Means

Related tutorials

Java Deep Dive Test

Java Level 1 Test

Java Level 2 Test