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49 interview questionsfor developers (2024)

Test your developer skills before an interview with 49 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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7
49 questions
Easy
15 votes1709 runs3 comments

Write a Java program that prints 'welovedev'.

Full stack developer
strings
variables
Pierreat Sep 19, 2022
Easy
8 votes1667 runs0 comment

How should a package be named in Java?

Full stack developer
packages
java
Pierreat Sep 19, 2022
Easy
5 votes1631 runs1 comment

How to concatenate two strings of characters in Java?

Full stack developer
strings
concatenation
Pierreat Jan 4, 2022
Medium
3 votes1641 runs2 comments

List the annotations that can be used in a JUnit test class.

Full stack developer
junit
annotations
Pierreat Jan 4, 2022
Medium
3 votes1602 runs1 comment

How to print an array in Java

Full stack developer
arrays
java
Pierreat Feb 6, 2024
Easy
3 votes1599 runs1 comment

What is “AssertEquals” used for in a Java Unit test?

Full stack developer
java
unit test
Pierreat Jan 4, 2022
Easy
3 votes1593 runs2 comments

Write a valid code comment in Java

Full stack developer
comments
java
Pierreat Jan 4, 2022
Medium
3 votes259 runs0 comment

What is the difference between an interface and an abstract class in Java?

Full stack developer
EL Mostafaat Feb 13, 2024
Easy
2 votes1642 runs0 comment

Are arrays primitives types in Java?

Full stack developer
arrays
primitives
Pierreat Sep 19, 2022
Easy
2 votes1613 runs0 comment

Add elements to an ArrayList in Java

Full stack developer
arrays
lists
java
Pierreat Jan 4, 2022
Easy
2 votes1570 runs0 comment

How to call an interface in a java class?

Full stack developer
interfaces
java
Pierreat Jan 4, 2022
Medium
2 votes907 runs2 comments

Which of the following statements applies to methods of an interface in Java? (from java 8)

Full stack developer
java
interface
Nathalieat Mar 28, 2023
Easy
1 vote598 runs0 comment

Reverse a string in Java

Full stack developer
strings
java
Pierreat Jan 4, 2022
Medium
1 vote452 runs0 comment

Declare a string array in Java

Full stack developer
arrays
java
Vincent Cotroat Nov 13, 2023
Medium
1 vote157 runs0 comment

Count the number of words in a string in Java

Full stack developer
hashmap
string
Pierreat Jan 4, 2022
Easy
1 vote53 runs0 comment

A class can implement multiple interfaces.

Full stack developer
EL Mostafaat Feb 13, 2024
Easy
0 vote1582 runs0 comment

What does `--` do in Java?

Full stack developer
operators
Pierreat Jan 4, 2022
Easy
0 vote1554 runs1 comment

Which of the following operators is used to allocate memory for an object?

Full stack developer
operators
memory
Pierreat Jan 4, 2022
Easy
0 vote1099 runs0 comment

Is a HashMap ordered?

Full stack developer
hashmap
collections
Pierreat Jan 4, 2022
Medium
0 vote609 runs0 comment

What is an IDE ?

Full stack developer
IDE
Pierreat Jan 4, 2022