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149 interview questions on Javafor developers (2025)

Test your technical skills before an interview of Java with 149 corrected questions. Beginner, Intermediate or Expert level.

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149 questions
Easy
28 votes2755 runs
12 comments
Hard
12 votes3278 runs1 comment
Hard
12 votes3230 runs0 comment

A monitor in Java

Thomas De verdièreat Jan 4, 2022
Easy
12 votes3178 runs0 comment
Hard
12 votes3123 runs0 comment
Easy
12 votes2666 runs
2 comments
Hard
10 votes3331 runs0 comment

A Customer class has the com.company.model package.

Back-end developer
inheritance
package
Thomas De verdièreat Jan 4, 2022
Hard
10 votes3277 runs
1 comment
Easy
10 votes2567 runs
2 comments
Hard
8 votes3258 runs0 comment

A “synchronized” method

Thomas De verdièreat Jan 4, 2022
Easy
8 votes3151 runs0 comment

What is the classpath for?

Back-end developer
java
classpath
Thomas De verdièreat Jan 4, 2022
Easy
8 votes2573 runs0 comment
Hard
7 votes3258 runs0 comment

Write a finalizer in Java.

Back-end developer
java
finalizer
Thomas De verdièreat Dec 16, 2021
Hard
7 votes3157 runs1 comment
Medium
7 votes3115 runs0 comment
Easy
7 votes2614 runs0 comment