DevSkiller Java Coding Questions have been specially prepared by our expert team of professionals for Java developers- from junior to senior level. All of our Java coding tests are specifically tailored to ensure you find the perfect candidate, using a specific range of Java questions.
DevSkiller Java coding questions are powered by the RealLifeTesting™ methodology which works by replicating real-world scenarios for your applicants to solve. Finding your next Java developer is simple with our unique range of tests.
Programming language: Java
Java frameworks and libraries: Spring Framework, Spring Boot, Hibernate, JPA, GWT, JSF, Vaadin, Play Framework, Groovy, Spock Framework / JUnit, TestNG, Selenium and others
Build tools: Maven, Gradle
assessing knowledge of Android
Android | Auction platform anonymizer - Implement missing sections of the Auction platform and its privacy policy where certain data must be anonymized.
assessing knowledge of Java
Java | Spring Security | Secure POST - Secure an enterprise application by allowing the administrator only to call state changing endpoints.
assessing knowledge of Java
Java | Orders Analyzer | Find a total ordered quantity of a product for every weekday - Implement a method that will analyze orders dataset and return a map with total ordered quantity of a product for every weekday
assessing knowledge of Java
Java | Movies analyzer | Find top favorite movies among friends - Implement a method that will analyze movies dataset and return array of most favourited movies
assessing knowledge of Java
Java | Orders Analyzer | Find an average order value for every weekday - Implement OrdersAnalyzer#averageDailySales method that returns a map of days of a week and rounds the average value to the nearest integer.
assessing knowledge of Java, CleanCode
Spring Security - Secure methods to allow only the article author to create and read an article with his name, using method annotations.
assessing knowledge of Java, CleanCode, Spring, Hibernate, JPA
Java | Movies Analyzer | Find top watchlisted movies among friends - Implement a method that will return an array of top four movie titles, that have been most watchlisted by friends of a given user.
assessing knowledge of Java, CleanCode
Spring Security - Secure ArticleService so that it returns only those articles in locale that are equal to the one currenntly used.
assessing knowledge of Java, CleanCode
Java | Logs Analyzer | Count matching log file entries - Complete a method which counts the lines within a ZIP file matching search strings.
Verify knowledge of Java: General Development Library, String Handling, concurrency,basics, and language spec
Fix bugs to make tests pass in a service that differentiates one book from another based on their titles
assessing knowledge of Java: General Terminology, General Knowledge, DriverManager, Input Variables, and String Handling
Java | Race Coordinator - Implement methods in Leg class, and implement methods in Race class following javadoc and unit tests.
Verify knowledge of Java: standard API, concurrency, dependency injection, AOP, Hibernate, and Input Variables
Implement ForexEngine.update method, and the Calculator.exchange method.
Verify knowledge of Java: Collections, Command Prompt, Integer class, Precise Values, Thread Handling, and Valid Package Name
Implement all the methods in the BookSuggestionService class
Verify knowledge of Java: Primitive Data Types, Logging, Reserved Words, interface defaults, concurrency, and **Environment Variables
Write code to pass unit tests in a Java distributed configuration store
assessing knowledge of Java
Java | Selenium | Data Extraction - Implement two methods at SeleniumExtractor class to extract some information.
Verify knowledge of Java: Primitive Data Types, Logging, Environment Variables, concurrency, Reserved Words, and interface defaults
Implement two methods in OrdersAnalyzer in a Java application
Verify knowledge of Spring: Context, Dependency Injection, context hierarchy, and constructor-based injection
Verify knowledge of Java: Command Prompt, Singletons, and Concurrent Maps
Implement all methods in the ItemRepository class
Verify knowledge of Spring: constructor-based injection, context hierarchy, and Context, Dependency Injection
Verify knowledge of Java: Collections, Concurrent Maps, and File Handling
Implement the ParserService#parseString method in a Spring application
assessing knowledge of Machine Learning, Android
Android | Social Network login - Implement missing sections of LoginActivity and MainActivity, LoginManager and CredentialsStorage.
verifying knowledge of a wide variety of common Android Features.
Fix an Android app so that it properly filters digits
assessing knowledge of Collections API
assessing knowledge of concurrency
extracting method metadata with Reflections API
assessing knowledge of Java, Hibernate, JPA
Java | Race Coordinator - Implement methods in Leg class, and implement methods in Race class following javadoc and unit tests.
Answer 3 questions on Android
Answer 3 questions on Android
Add features to an android app
assessing knowledge of Android development
social network login application, candidate needs to finish an implementation of social login flow
Java tests use RealLifeTesting™ so you can assess each applicant’s knowledge of Java coding in a controlled environment. DevSkiller Java coding questions provide you with a clear understanding of an applicant’s coding ability and problem-solving skills.
Java is a compiled, object-oriented programming language. It is intended to let application developers “write once, run anywhere,” meaning that compiled Java code can run on all platforms that support Java, without the need for recompilation. However Java is not considered the easiest programming language to use for non-programmers, so you will want to hire the right Java developer for the job.
It is important to understand that the Java world evolves quickly so your ideal candidate will need to have up to date, relevant experience. Your Java developer will need to have an understanding of Java language through collections, “streams” and lambda expressions and concurrency through thread pools. They should have knowledge of frameworks including Spring Boot 2, Hibernate and SQL, JUnit, and Spock among others. As well as the language itself, your Java developer will also need to have knowledge of the tools and libraries of the language, such as Maven and Gradle, Git, and Docker – this will pay dividends in time-saving further down the line. Finally, your Java Developer should have hands-on, practical experience of working on actual coding projects, be it commercial or otherwise.
Do you want to test our Java Coding Questions using your own codebase? No problem. The DevSkiller online task wizard is stacked with awesome features that allow you to customize your test invites. Choose the languages you want to test, define the test scope, and duration all while monitoring your applicants’ process in real-time. Remote testing means you can conveniently test your applicants and find the best talent from all corners of the globe.
If you think DevSkiller might be just what your business needs, but you want to be sure, check out the case study below:
Ada Health
Ada Health is a global health company founded by doctors, scientists, and industry pioneers to create new possibilities for personal health. The company previously screened tech skills through an on-site task, followed by a team interview- a procedure that required a great deal of time. For this reason, the biggest objective Ada had was an improved interview experience that would save time.
“DevSkiller helped us to save precious on-site time for applicants that are already likely to be a fit. We’re saving 3 hours per candidate – that was the time we spent with applicants on a technical task before.”
Micha Gerwig– Engineering Manager Ada Health
With our Java online tests, once the candidate has completed the test, the results are automatically evaluated and presented in a clear and concise way. You don’t have to be technically minded to understand them. Each candidate is evaluated based on the solutions they have provided, with each candidate being assessed based on whether their solution would work, the quality of the code, and any errors in the code. In addition, extra features test for plagiarism from previous tests.
DevSkiller’s Java online tests are accessible from anywhere, meaning all the recruiter has to do is provide the test, then it is up to the candidate to come up with the right results. Each test can be made accessible for a limited time. Candidates can complete tests using their favorite IDE and then clone the project to GIT. Candidates can also run unit tests to make sure their solutions are effective. Once completed, test results are automatically evaluated and presented to the recruiter in the form of a report.
DevSkiller provides an extensive library of Java coding tests, meaning you can start testing candidates immediately after setting up your account. The whole process of setting up your Java coding questions can take as little as five minutes.
Feedback received from candidates is that they love the structure of DevSkiller Java coding tests. We find candidates like having a chance to prove their software development skills, rather than simply trying to churn out old algorithms that they haven’t touched since they were students. They also like that DevSkiller tests use normal coding practices and conventional tools like unit testing and cloning to GIT from a personal IDE.
If developer candidates are apprehensive about taking the test, their suspicions usually come from experience taking algorithmic tests- tests that don’t monitor the actual skills a developer uses on an everyday basis. With DevSkiller online tests, we find that candidates can immediately tell the difference and can test their Java coding skills in a way that is challenging but also a fair representation of the type of work they will be doing.
Java coding tests are flexible and you can set the duration to suit your own preferences. You have the option to use the default settings, or to cater the test to your own needs. Furthermore, each individual question within a test, can also be set with time-limits.
