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SOLID Principles Online Test

The Solid Principles Test uses scenario-based multiple choice questions to evaluate candidates on their understanding of the SOLID design principles for object-oriented software development. The test assesses candidates' proficiency in applying SOLID principles to write maintainable, extensible, and testable code, including topics such as single responsibility principle (SRP), open-closed principle (OCP), Liskov substitution principle (LSP), interface segregation principle (ISP), dependency inversion principle (DIP), and the SOLID design patterns.

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Screen candidates with a 25 mins test

Test duration:  25 mins
Difficulty level:  Moderate
Availability:  Ready to use
Questions:
  • 10 SOLID MCQs
Covered skills:
Open Closed Principle (OCP)
Interface Segregation Principle (ISP)
Dependency Inversion Principle (DIP)
Single Responsibility Principle (SRP)
Liskov Substitution Principle (LSP)
Inversion of Control
Violation in SRP
Cohesion and Encapsulation
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Use the SOLID Principles Test to shortlist qualified candidates

The SOLID Principles Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

  • Understanding and applying the Open Closed Principle (OCP)
  • Implementing interfaces to adhere to the Interface Segregation Principle (ISP)
  • Applying the Dependency Inversion Principle (DIP) to decouple components
  • Designing classes and modules with a single responsibility, following the Single Responsibility Principle (SRP)
  • Ensuring proper inheritance and substitutability with the Liskov Substitution Principle (LSP)
  • Utilizing Inversion of Control (IoC) containers for managing object dependencies
  • Identifying and resolving violations of the Single Responsibility Principle (SRP)
  • Ensuring high cohesion and encapsulation in code design
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Screen candidates with the highest quality 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.

How we design questions

These are just a small sample from our library of 15,000+ questions. The actual questions on this SOLID Principles Test will be non-googleable.

🧐 Question

Easy

Paint says Bye!
Solve
Which SOLID principle is followed by the given code snippet?
 image
🧐 Question🔧 Skill

Easy

Paint says Bye!

2 mins

SOLID
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Paint says Bye!
SOLID
Easy2 mins
Solve

Test candidates on core SOLID Principles Hiring Test topics

Open Closed Principle (OCP): The Open Closed Principle (OCP) states that software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification. This means that new functionality can be added without changing the existing code, making the software more maintainable and robust.

Interface Segregation Principle (ISP): The Interface Segregation Principle (ISP) states that clients should not be forced to depend on interfaces they do not use. By creating smaller, cohesive interfaces, this principle helps to prevent a class from implementing unnecessary methods, reducing complexity and improving code readability.

Dependency Inversion Principle (DIP): The Dependency Inversion Principle (DIP) states that high-level modules should not depend on low-level modules. Instead, both should depend on abstractions. By using interfaces or abstract classes to define the dependencies, this principle promotes loose coupling, making the code more flexible, testable, and easier to maintain.

Single Responsibility Principle (SRP): The Single Responsibility Principle (SRP) states that a class should have only one reason to change. By separating concerns and assigning each class a single responsibility, this principle improves code organization, readability, and maintainability.

Liskov Substitution Principle (LSP): The Liskov Substitution Principle (LSP) states that objects of a superclass should be replaceable with objects of its subclasses, without affecting the correctness of the program. This principle ensures that inheritance is used correctly, avoiding unexpected behavior and allowing the code to be extended without breaking existing functionality.

Inversion of Control: Inversion of Control (IoC) is a design principle that refers to the external control of an object's lifecycle, rather than the object itself managing its dependencies and resources. This principle enables loose coupling, promotes modularity, and simplifies testing and maintenance.

Violation in SRP: A violation of the Single Responsibility Principle (SRP) occurs when a class has multiple responsibilities, making it difficult to understand, maintain, and reuse. This measurement helps identify classes that may require refactoring to adhere to the principle, improving code quality and reducing complexity.

Cohesion and Encapsulation: Cohesion refers to the degree to which the elements of a module or class are related to each other. Encapsulation refers to the bundling of related data and behavior into a single entity, such as a class. Measuring cohesion and encapsulation helps assess the design and organization of the code, ensuring high cohesion and strong encapsulation for better maintainability and extensibility.

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Have questions about the SOLID Principles Hiring Test?

What roles can I use the SOLID Principles Test for?

Here are few roles for which we recommend this test:

  • Software Developer
  • Software Engineer
  • Full Stack Developer
  • Front-end Developer
  • Back-end Developer
Can I combine SOLID Principles Test with Software System Design questions?

Yes, you can request a custom test that includes the SOLID Principles and Software System Design skills. For more about the Software System Design test, visit our Software System Design Online Test.

How to use SOLID Principles Test in my hiring process?

Use this assessment at the start of your hiring process. Link the test in your job post or directly invite candidates via email. Adaface streamlines your hiring by identifying top skills early.

What are the main Software Engineering tests?
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
  • Screen proctoring
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser
  • Copy paste protection

Read more about the proctoring features.

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.

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.

Can I get a free trial?

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

What is SOLID Principles Test?

The SOLID Principles Test assesses knowledge of the SOLID design principles for software development. It is used by recruiters and hiring managers to evaluate candidates' ability to create maintainable, scalable, and flexible code.

What topics are evaluated in the SOLID Principles Test?

The test covers Open Closed Principle (OCP), Interface Segregation Principle (ISP), Dependency Inversion Principle (DIP), Single Responsibility Principle (SRP), Liskov Substitution Principle (LSP), Inversion of Control, Violation in SRP, Cohesion and Encapsulation.

Can I test SOLID Principles and Technical Aptitude together in a test?

Yes, you can. Combining SOLID Principles with Technical Aptitude gives a comprehensive evaluation of a candidate's skills. Learn more about our Technical Aptitude Test.

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. Here's a quick guide on how you can request a custom test.

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.

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.

What is the cost of using this test?

You can check out our pricing plans.

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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