74 interview questions for developers (2024)

Hard

9 votes2617 runs0 comment

How many times is the condition `(a++ < 15)` evaluated in the following code? ```java int a = 3; while (a++ < 15) { if ((a++ % 5) == 0) break; } ```

Back-end developer

loops

control flow

Thomas De verdièreat Dec 16, 2021

Hard

8 votes2657 runs0 comment

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

Back-end developer

inheritance

package

Thomas De verdièreat Jan 4, 2022

Hard

7 votes2566 runs0 comment

A monitor in Java

Back-end developer

java

thread

Thomas De verdièreat Jan 4, 2022

Hard

6 votes2602 runs1 comment

How to write a portable Java program

Back-end developer

java

native

Thomas De verdièreat Jan 4, 2022

Hard

6 votes2580 runs0 comment

Write a finalizer in Java.

Back-end developer

java

finalizer

Thomas De verdièreat Dec 16, 2021

Medium

5 votes2598 runs0 comment

What does the final keyword mean in front of a method in Java?

Back-end developer

java

methods

Thomas De verdièreat Jan 4, 2022

Hard

5 votes2593 runs1 comment

Serialization can be customized with the Externalizable interface

Back-end developer

serialization

interface

Thomas De verdièreat Jan 4, 2022

Easy

5 votes2557 runs0 comment

What are the visibility modifiers for a method in Java?

Back-end developer

access modifiers

methods

Thomas De verdièreat Jan 4, 2022

Hard

5 votes2553 runs0 comment

What "design pattern" makes it possible to offer a means of treating the elements of a tree without worrying about the course?

Back-end developer

design pattern

tree

Thomas De verdièreat Jan 4, 2022

Easy

5 votes2538 runs0 comment

Which of these classes is the most suitable for composing a character string from several elements concatenated to each other?

Back-end developer

string

java

Thomas De verdièreat Jan 4, 2022

Hard

5 votes2510 runs0 comment

How many instance of Integer cannot be freed from memory?

Back-end developer

array

memory

Thomas De verdièreat Dec 16, 2021

Hard

4 votes2622 runs0 comment

A “synchronized” method

Back-end developer

java

method

Thomas De verdièreat Jan 4, 2022

Easy

4 votes2563 runs0 comment

What is the classpath for?

Back-end developer

java

classpath

Thomas De verdièreat Jan 4, 2022

Hard

4 votes2562 runs1 comment

A referenced object is an object that can be reached by a “living” thread.

Back-end developer

java

garbage collection

Thomas De verdièreat Jan 4, 2022

Hard

4 votes2525 runs0 comment

What design pattern will you use to dynamically add capabilities to an object in Java?

Back-end developer

design patterns

object

Thomas De verdièreat Jan 4, 2022

Hard

4 votes289 runs1 comment

The Garbage Collector G1(or Garbage First) is a GC that organizes the heap in a way

Back-end developer

garbage collection

java

Loïcat Jan 31, 2022

Hard

3 votes2586 runs0 comment

What is the error message when you try to serialize a class that does not implement Serializable?

Back-end developer

java

serialization

Thomas De verdièreat Dec 2, 2021

Hard

3 votes2576 runs0 comment

Autoboxing allows you to convert an int in Integer, a boolean in Boolean

Back-end developer

java

autoboxing

Thomas De verdièreat Jan 4, 2022

Hard

3 votes2569 runs0 comment

How to create a class in Java with a version number of 14.

Back-end developer

java

class

Thomas De verdièreat Dec 3, 2021

Hard

3 votes2561 runs0 comment

Which executable is used to obtain a thread dump?

Back-end developer

java

jstack

Thomas De verdièreat Jan 4, 2022

74 interview questionsfor developers (2024)

Test your developer skills before an interview with 74 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

How many times is the condition `(a++ < 15)` evaluated in the following code? ```java int a = 3; while (a++ < 15) { if ((a++ % 5) == 0) break; } ```

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

A monitor in Java

How to write a portable Java program

Write a finalizer in Java.

What does the final keyword mean in front of a method in Java?

Serialization can be customized with the Externalizable interface

What are the visibility modifiers for a method in Java?

What "design pattern" makes it possible to offer a means of treating the elements of a tree without worrying about the course?

Which of these classes is the most suitable for composing a character string from several elements concatenated to each other?

How many instance of Integer cannot be freed from memory?

A “synchronized” method

What is the classpath for?

A referenced object is an object that can be reached by a “living” thread.

What design pattern will you use to dynamically add capabilities to an object in Java?

The Garbage Collector G1(or Garbage First) is a GC that organizes the heap in a way

What is the error message when you try to serialize a class that does not implement Serializable?

Autoboxing allows you to convert an int in Integer, a boolean in Boolean

How to create a class in Java with a version number of 14.

Which executable is used to obtain a thread dump?