Java Algorithms Online Test
TestDome skill assessments are used by more than 7,000 companies and 450,000 individual test takers.
For Jobseekers
Practice your skills and earn a certificate of achievement when you score in the top 25%.
Take a Practice TestFor Companies
Test how candidates think, strategize, and problem solve so you can interview the best.
Sign Up to Offer This TestTestDome Skill Assessments
Used by over 450,000 jobseekers
Trusted by over 7,000 companies
Premium questions with real-world problems
The Java Algorithms online test assesses candidates' algorithmic-thinking skills and their ability to implement algorithms using Java.
It's an ideal test for pre-employment screening. A good developer will be able to design and implement algorithms that are both correct and efficient. Computational complexity is important not only when scaling applications but when creating responsive, maintainable, and efficient code.
This online test requires candidates to analyze or design an algorithm using Java as the programming language.
TestDome is trusted by businesses large and small
Practice your skills.
Sign up for a trial plan.
Free Sample Questions for Java Algorithms Test
Our sample questions are free for companies to use on a trial plan. See more about our premium questions for paid plans below.
Alert Service
Refactor the AlertService and MapAlertDAO classes:
- Create a new package-private interface, named AlertDAO, that contains the same methods as MapAlertDAO.
- MapAlertDAO should implement the AlertDAO interface.
- AlertService should have a constructor that accepts AlertDAO.
- The raiseAlert and getAlertTime methods should use the object passed through the constructor.
Merge Names
Implement the uniqueNames method. When passed two arrays of names, it will return an array containing the names that appear in either or both arrays. The returned array should have no duplicates.
For example, calling MergeNames.uniqueNames(new String[]{'Ava', 'Emma', 'Olivia'}, new String[]{'Olivia', 'Sophia', 'Emma'}) should return an array containing Ava, Emma, Olivia, and Sophia in any order.
Binary Search Tree
Binary search tree (BST) is a binary tree where the value of each node is larger or equal to the values in all the nodes in that node's left subtree and is smaller than the values in all the nodes in that node's right subtree.
Write a function that, efficiently with respect to time used, checks if a given binary search tree contains a given value.
For example, for the following tree:
- n1 (Value: 1, Left: null, Right: null)
- n2 (Value: 2, Left: n1, Right: n3)
- n3 (Value: 3, Left: null, Right: null)
Call to contains(n2, 3) should return true since a tree with root at n2 contains number 3.
Practice your skills.
Pick the number of tests you need.
Pass/fail grouping
Our tests are designed to put candidates into either the pass group or the fail group so you can find the best candidates faster.
Full customization
We have pre-built tests and questions, but you can customize them however you like. Change the pass/fail scores, time requirements, and more.
Cheating protection
Use tests that solve real-world problems, with no answers that can be easily found online. Because we test performance and skills (not information), we allow the use of online resources, just like in real life. Copy/paste prevention and online proctoring via webcam prevent cheating.
Candidate reporting
Get an overview into the percentage of passes and fails. Then dive deeper into the results of your top candidates to select who goes onto the next phase of hiring.
Learn more
Sign up for a trial plan.
Premium Questions for Java Algorithms Test
TestDome offers a premium questions library with 1000+ unique, hand-crafted questions whose answers can’t be found online. If you spot an answer somewhere online, we’ll give you a refund.
Question Names
These premium questions are included in this pre-built test and can be added to any multi-skill test. Please sign up for a paid plan to view the questions in detail.
Max Sum, Paper Strip, Unloading Trucks, Veterinarian, Internal Nodes, Platformer, Remove Repetitions, Unique Product, Unique Numbers, Book Sale, Friend, Stories, Moving Total, Flight ConnectionsCovered Skills
Testing of these skills is covered in this pre-built test because they’re closely related. On our paid plan, you can easily create your own custom multi-skill tests.
JavaRecommended Job Roles
These are the job roles that we recommend for the Java Algorithms online test.
Take or Offer the Java Algorithms Online Test
For Jobseekers
Take a Practice TestFor Companies
Sign Up to Offer This TestHow TestDome works
1. Choose or create a test
2. Share your test via URL or email
3. Review overall results and pass/fail grouping
4. Dive deeper into individual results
Excellent support & free concierge service
We offer fast, hands-on support for any question or concern you might have. If you want help with building a custom test or inviting candidates, we’ll handle everything for you.
Contact Support for any questions or to request our free concierge service.
