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About the test:

The Java test uses scenario-based and code-tracing questions to evaluate candidates' knowledge of core Java concepts such as OOPs, Classes, Exceptions, Collections and advanced topics such as concurrent programming with threads and handling relational databases. The test uses simple Java Coding questions to assess a candidate's ability to code in Java.

Covered skills:

  • Foundations of the Java syntax and semantics
  • Object-Oriented Programming
  • Basics of Web application programming
  • Working with Databases
See all covered skills

9 reasons why
9 reasons why

Adaface Java Online Test is the most accurate way to shortlist Java Developers



Reason #1

Tests for on-the-job skills

The Java Online test helps recruiters and hiring managers identify qualified candidates from a pool of resumes and take objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves expensive engineering time by filtering out unqualified candidates.

The Adaface Java test screens candidates for the typical skills recruiters look for in a Java developer:

  • Experience with basic syntax and functions of Java
  • Experience with core Java concepts such as Strings, OOPs, Classes & Collections
  • Able to efficiently handle exceptions and errors
  • Working with relational databases & JDBC
  • Ability to detect and correct common programming errors at compile time and run time
  • Hands-on Java coding experience
Reason #2

No trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface ->
Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

These are just a small sample from our library of 10,000+ questions. The actual questions on this Java Online Test will be non-googleable.

🧐 Question

Easy

Custom Exception
Exceptions
Solve
                        What does the following code output?
                        
 image

Options:

  • Catch22
  • 42
  • 0
  • RunTime error

Medium

Holding References
Solve
                        What does the following Java code output?
                        
 image

Options:

  • 1
  • 2
  • 3
  • 12
  • 13
  • Error

Medium

Abstract Interface
OOPs
Interfaces
Solve
                        Given following interface:
                        
 image
                        Which of these are correct classes?
                        
 image

Options:

  • A C
  • A D
  • A E
  • B C
  • B D
  • B E
  • C D
  • C E
  • A B
  • D E

Medium

Garbage Collection
Garbage Collection
Solve
                        After which line is "bs" object, created on Line 4, eligible for garbage collection?
                        
 image

Options:

  • After Line 4
  • After Line 5
  • After Line 8
  • After Line 9
  • After Line 11
  • After Line 12
  • When main() completes

Medium

Static Init Blocks
OOPs
Solve
                        What does the following code output?
                        
 image
                        1) G A B E D H
2) G B A D E H
3) G B A D E H C F
4) C F G A B E D H
5) C F G B A D E H
6) G C F A B E D H
7) G C F B A D E H

Options:

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7

Medium

Longest Road
logic
hashmaps
Solve
                        A startup company E-Motors is building driverless automated cars. The car contains a sensor that checks the road quality for the next N meters to decide the optimal speed at which the cars should move. We are given recorded data by the sensor in the form of an array, where each element of the array is the rating given to 1 meter of the road in sequence. 

The rating given by the sensor is from 1 to 100, where 100 represents the road with the best condition, and any rating above 60 is optimal. Find the longest stretch of road in meters that is categorized as optimal by the sensor.

The input is an array of "strings" which needs to be converted from string to integer/number inside the function.
    🧐 Question🔧 Skill

    Easy

    Custom Exception
    Exceptions
    2 mins
    Java
    Solve

    Medium

    Holding References
    2 mins
    Java
    Solve

    Medium

    Abstract Interface
    OOPs
    Interfaces
    2 mins
    Java
    Solve

    Medium

    Garbage Collection
    Garbage Collection
    2 mins
    Java
    Solve

    Medium

    Static Init Blocks
    OOPs
    2 mins
    Java
    Solve

    Medium

    Longest Road
    logic
    hashmaps
    25 mins
    Coding
    Solve
    🧐 Question🔧 Skill💪 Difficulty⌛ Time
    Custom Exception
    Exceptions
    Java
    Easy2 minsSolve
    Holding References
    Java
    Medium2 minsSolve
    Abstract Interface
    OOPs
    Interfaces
    Java
    Medium2 minsSolve
    Garbage Collection
    Garbage Collection
    Java
    Medium2 minsSolve
    Static Init Blocks
    OOPs
    Java
    Medium2 minsSolve
    Longest Road
    logic
    hashmaps
    Coding
    Medium25 minsSolve
    Reason #4

    1200+ customers in 75 countries

    Brandon

    With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!


    Brandon Lee, Head of People, Love, Bonito

    Reason #5

    1 click candidate invites

    Email invites: You can send candidates an email invite to the Java Online Test from your dashboard by entering their email address.

    Public link: You can create a public link for each test that you can share with candidates.

    API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

    Reason #6

    Detailed scorecards & comparative results

    Reason #7

    Designed for elimination, not selection

    The most important thing while implementing the pre-employment Java Online Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

    Reason #8

    High completion rate

    Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

    This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

    Reason #9

    Advanced Proctoring


    How is the test customized for Senior Java developers?

    For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This includes adding questions on topics like

    • Using abstract classes, encapsulation, polymorphism, and interfaces efficiently
    • Comparing the efficiency of two programs in terms of the resources used
    • Best practices of using collections in Java
    • Reflection API
    • Functional programming using Lambdas and Streams API
    • In-depth knowledge of exception handling and garbage collection in Java
    • Efficient concurrent programming techniques
    • Event-driven programming & Web application programming

    The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on usage of Java collections.

    What roles can I use the Java Online Test for?

    • Java Developer
    • Java Programmer
    • Backend Developer
    • Senior Java Eningeer

    What topics are covered in the Java Online Test?

    Arrays
    Objects
    Strings
    Data Structures
    Reflection API
    Functional programming
    Lambdas
    Streams API
    Regular Expressions
    JDBC
    Working with Databases
    Serialization & De-serialization
    Object-oriented programming (OOP)
    Classes & Objects
    Web application programming
    Annotations
    Optionals
    Modules
    Java 8 Date/Time API
    List, Set, Map interfaces
    SOLID
    Java Collections Framework
    Searching
    Sorting
    Variables
    Data Types
    JSP
    Servlets
    Generics
    Multi-threading
    Exception Handling
    File system Handling
    Inheritance
    Polymorphism
    Debugging
    Matrices
    Event-Driven Programming
    Singapore government logo

    The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.


    85%
    reduction in screening time

    Java Online Test FAQs

    What type of questions will the Java Online Test include?

    The test will have MCQ questions and coding questions. The coding question is designed to evaluate hands-on Java programming experience. The MCQ questions are scenario-based to evaluate on-the-job skills as opposed to just theoretical concepts.

    How can I test multiple Java related skills in a single pre-employment test?

    Our customized assessments allow you to test multiple skills in a single test. For example, suppose you are looking for a Java developer with knowledge of Spring and SQL. In that case, we customize an assessment to assess all the three skills in the test.

    What skills are required for a Java role?

    Depending on the role and industry, a Java developer might require these skills:

    • Understanding of Object-Oriented Programming concepts
    • Understanding of when to use design patterns such as Singleton, Factory, Fly-weight, Builder, Object Pool, Iterator, Strategy, Visitor, Composite. This skill is particularly important for senior Java developers who will have to work on the architecture of applications to design long-term solutions
    • Understanding of the class loading process and how class loaders work
    • Deep understanding of the nuanced world of performance, whether that be memory overhead, computation complexity, or speed
    • Knowledge of when memory is being allocated, from what context, and how it affects heap fragmentation
    • Familiarity with the various garbage collection algorithms, and how to use the profilers
    • Experience with JSP / Servlets, Web Frameworks like Struts / Spring, and Service-Oriented Architecture / Web Services – SOAP / REST
    • Ability to apply the most modern patterns and language features to existing systems
    • Experience in using technologies in the Java ecosystem: Struts, Spring, Maven, Gradle, Ant, JUnit, Spock, and Hibernate, among many others
    • Knowledge of the intricacies of SQL queries
    • Ability to learn new technologies and willingness to step out of comfort zone to explore and learn new skills

    Can I combine multiple skills into one custom assessment?

    Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify.

    Do you have any anti-cheating or proctoring features in place?

    We have the following anti-cheating features in place:

    • Non-googleable questions
    • IP proctoring
    • Web proctoring
    • Webcam proctoring
    • Plagiarism detection
    • Secure browser

    Read more about the proctoring features.

    How do I interpret test scores?

    The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

    What experience level can I use this test for?

    Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

    Does every candidate get the same questions?

    Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

    I'm a candidate. Can I try a practice test?

    No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

    What is the cost of using this test?

    You can check out our pricing plans.

    Can I get a free trial?

    Yes, you can sign up for free and preview this test.

    I just moved to a paid plan. How can I request a custom assessment?

    Here is a quick guide on how to request a custom assessment on Adaface.

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