Java Online Coding Tests

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About our Java Coding Tests

We provide your team with realistic and practical coding tests that accurately evaluate candidates’ Java skills. Using solutions like CoderPad Screen, you’ll be able to create Java coding tests in 60 seconds even if you’re not techy.

Our tests are designed to cover essential concepts, object-oriented programming, data structures, algorithms, and more. These tests are crafted by our industry experts, ensuring their alignment with real-world scenarios and their effectiveness in assessing candidates’ abilities.
Hiring managers who would like to go further can even customize the test and add their own coding exercises. 

• Recommended duration: 17-45 min
• Average number of questions: 20
• Type of exercises: Multiple choice, coding exercises
• Test levels: Junior, Senior, Expert

ℹ️ Explore our questions bank and test our candidate experience yourself

Java Sample Questions

Example Question 1

In this exercise, you have to analyze records of temperature to find the closest to zero.

Implement the function int compute_closest_to_zero(vector<int> ts) which takes an array of temperatures ts and returns the temperature closest to 0.

ℹ️ Preview a sample coding test report

Explore Code Playback

Gain a deeper insight into the thought process and coding abilities of your developer candidates. 

• Observe their algorithm-building skills and evaluate their approach and coding instincts. 
• Make a mental note of areas that you would like to explore further in subsequent discussions. 
• Be vigilant in identifying any questionable or concerning behavior

How to test Java skills to hire for your team?

Relying solely on resumes may not accurately represent a Java developer’s skills, and self-reported skills can be unreliable.

Here are five ways to assess Java developers’ coding skills:

• Review their programmer portfolio, which showcases Java projects they have worked on and their proficiency in the language.
• Examine their GitHub account to assess their Java code quality, activity, and involvement in Java-related projects.
• Inquire about their use of Stack Overflow to gauge their knowledge level and participation in the Java development community.
• Use programming tests tailored for Java developers, allowing them to solve practical Java problems and assessing their coding skills objectively.
• Conduct live coding interviews specific to Java, where candidates can demonstrate their coding skills, problem-solving abilities, and knowledge of Java concepts.

💡 To dig deeper > 5 ways to test developers’ skills before hiring

How to approach initial candidate screening effectively?

Some recruiters may have concerns about testing candidates too early in the hiring process, as they fear it might offend or deter them. However, this doesn’t have to be the case. It is crucial to handle this situation appropriately to ensure candidates understand the purpose, feel their time is valued, and recognize their importance.

Follow these guidelines to incorporate early testing while ensuring a positive candidate experience:

1. Job Ad: Clearly communicate that testing is the first step in your hiring process within your job advertisement. By setting this expectation upfront, you eliminate the risk of candidates feeling singled out for testing. Additionally, provide information about the time commitment required so that candidates can plan accordingly.

2. Emphasize Fair Hiring and Diversity: Highlight how the testing process enables fair hiring practices and promotes diversity within your organization. Make it known that your focus is on assessing skills rather than judging candidates based on irrelevant factors. Convey that you are open to considering a diverse pool of candidates, including those without prestigious degrees or individuals starting their coding careers.

3. Concise Assessment: Keep the assessment as brief as possible, respecting candidates’ time. Select an appropriate length for the test, including only the skills that are truly essential for the position. Ideally, aim for a test that can be completed within an hour or less. If you can design an even shorter test that fulfills your requirements, it’s even better.

4. Relevance: Concentrate solely on the skills that are directly applicable to the role. Avoid the temptation to create a laundry list of nice-to-have skills that are unnecessary for the actual job. Demonstrating a pragmatic approach by focusing on skills that have a practical impact on day-to-day tasks is appreciated by developers.

5. Share Results: Provide candidates with their test results to ensure a more fulfilling experience. If you utilize a tool like CoderPad Screen, which automatically generates a brief report and sends it to candidates, you enhance their experience. Candidates who underperform will understand the reasons they weren’t selected for the next stage, and receiving results also serve as an additional incentive for completing the test.