Java Design Patterns Online Test

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iMocha's Java Design Patterns online test is the most preferred skills assessment for recruiters and hiring managers to assess candidate's design patterns skills. This assessment is useful for hiring Java developer and can help reduce hiring time by 40%. 

About Java Design Patterns Online Test

Design patterns represent the best practices used by experienced object-oriented software developers. Design patterns are solutions to general problems that software developers face during software development. These patterns are mostly created for the OOPs languages like Java. In Java Design Patterns, there are three main patterns which are exclusively used by the developers namely – Creational (Singleton Design Pattern), Structural (Decorator Design Pattern), and Behavioral (Command Design Pattern).   
Java Design Patterns online test helps tech recruiters and hiring managers to assess design patterns programming skills of the candidate. Java Design Patterns skills test is designed by experienced Subject Matter Experts (SME) to evaluate and hire Java developers as per the industry standards. 

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Test Summary

Java Design Patterns online test helps to screen the candidates who possess traits as follows: 

  • Strong experience of various patterns like Structural Patterns, Behavioral Patterns, Singleton Design Pattern, etc 

  • Good knowledge of channeling messages and delivering guaranteed mechanism 

  • Good understanding of using JDK factory methods and transfer objects 

  • Familiarity with other patterns used in Java like Remote Proxy Design Pattern and DAO Pattern 

Java Design Patterns online test is a secure and reliable way of candidate assessment. You can use our role-based access control feature to restrict system access based on the roles of individual users within the recruiting team. Features like window violation, image, audio & video proctoring help detect cheating during the test. 
This test may contain MCQs (Multiple Choice Questions), MAQs (Multiple Answer Questions), Fill in the Blanks, Whiteboard Questions, Audio / Video Questions, LogicBox (AI-based Pseudo-Coding Platform), Coding Simulators, True or False Questions, etc. 

Test Duration: 20 minutes

No. of Questions: 10

Level of Expertise: Entry Level/Mid/Senior

Useful for hiring

  • Java Developer
  • Software Engineer – Java

Topics Covered

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Structural Patterns

Java design patterns online test helps recruiters to assess candidates' ability to use structural patterns to make classes & objects reusable  

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Behavioral Patterns

This assessment helps tech recruiters to assess developers' skills related to behavioral design patterns to increase flexibility in carrying out communication patterns among objects 

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Singleton Design Pattern

This test assesses candidates' ability to use singleton design pattern in application so that one object can coordinate actions across the system 

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Remote Proxy Design Pattern

This assessment helps recruiters to evaluate candidates ability to use remote proxy design pattern to represent the object located remotely 

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DAO Pattern

Design patterns online test helps recruiters to evaluate candidate knowledge of using DAO pattern to separate low level data accessing API or operations from high level business services 

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Transfer Object

This assessment helps recruiters to quantify candidates' knowledge of using transfer object pattern to pass data with multiple attributes in one shot from client to server 

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JDK Factory Methods

Recruiters can use this test to evaluate candidate’s ability to use JDK factory method to create objects instead of direct constructor call 

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Messaging Channels

Design patterns online test helps recruiter to assess candidates' ability to use Messaging Channels to allow one application communicate with another   

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Guaranteed Delivery Mechanism

This assessment helps recruiters to evaluate a candidate’s ability to use a guaranteed delivery mechanism 

Sample Questions

Choose from our 100,000+ question library or add your own questions to make powerful custom tests

Question types:

Multiple Option


Structural Patterns



Q 1. As shown in the diagram, the client class has information about upper x and y, and lower x and y. This is all we need for displaying rectangles, but we have a legacy rectangles class that is displaying rectangles based on different parameters. We should not delete the legacy rectangle or change it since it is already in use. Which design pattern could help us based on this diagram?


Question types:

Multiple Answer


Creational Patterns



Q 2. You are given the task of upgrading applications made a long time ago for a client who is producing kid's toys. A lot of design patterns are implemented in this project that will ease the process of upgrading this application. The first thing you need to do is to recognize which design patterns are used and modify them if necessary, with the new language features. Based on the following diagram that you've drawn from analyzing the code, this could be a part of which design pattern?

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Abstract Factory
Factory Method

Sample Report

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Trusted By

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“The best part of iMocha is they have topic wise questions available. So if there is a need to evaluate Java or .Net skills of the employees, you can create specific assessments which will accurately measure their knowledge in that skill.”

Cheryl Tolkinen, Learning & Development Manager, Securian, USA

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