Mocha Online Test

The Mocha Online Test uses scenario-based MCQs to evaluate candidates on their proficiency in writing unit tests for JavaScript applications using the Mocha testing framework. The test assesses candidates' understanding of topics such as test-driven development, assertion libraries, asynchronous testing, and test organization. Candidates are evaluated on their ability to use Mocha to write effective and efficient unit tests for JavaScript code, including using the appropriate syntax for assertions, running tests asynchronously, organizing tests into suites, and generating test reports.

Covered skills:

Data Layers
Statistical Layers
Initializers
Test Execution
Mocha Backends
Computation Layer
Utility Layers
CPU Backend with Native Extention

Test Duration

~ 30 mins

Difficulty Level

Moderate

Questions

5 Mocha MCQs
5 Testing MCQs
5 JavaScript MCQs

Availability

Available as custom test

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About the Mocha Test

The Mocha Online Test assists recruiters and hiring managers in pinpointing capable candidates from a stack of applications, streamlining unbiased hiring decisions. By filtering out unsuitable applicants early on, it lessens the burden of interviewing numerous individuals, saving valuable time.

This test evaluates candidates on their abilities in various areas, including understanding of data layers, statistical layers, and initializers. It further assesses their competence in test execution and with Mocha backends. The test examines skills related to computation and utility layers, as well as proficiency with CPU backends using native extensions. It serves as a checkpoint on the skillsets necessary for excelling in roles that require JavaScript testing and related technologies.

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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.

How we design questions

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

🧐 Question
Medium Database testcase Regression Testing Regression Testing In Specific Contexts Test Case Analysis	Solve
Adaface is developing a new database system called “Helen”. The tester at Adaface developed the following testcase for regression testing: 1. Open Helen 2. Open “Students” database 3. Enter data for “Sid” 4. Set checkpoint 5. Store “Sid” data in “Students” 6. Restart Helen 7. Read “Sid” data from “Students” 8. Compare checkpoint with the contents When the tester ran the testcase the first time, it worked as expected. Pick the correct statements: A: When the test case is ran the second time, the data entry for “Sid” already exists in the database. B: When the test case is ran the second time, it performs exactly as it did the first time C: The testcase is a good example for regression testing “Helen” D: The testcase is not a good example for regression testing “Helen” since the system behaves differently when the testcase is ran the second time
Medium Decision Table	Solve
Check the following decision table: What are the expected actions for following testcases? I: Joey's age is 22. He is a smoker residing in India II: Jennifer's age is 62. She is a non-smoker not residing in India A) I - Insure, 10% discount. II - Insure, no discount B) I - Don't insure. II - Don't insure C) I - Insure, no discount. II - Don't insure D) I - Insure, no discount. II - Insure, 10% discount
Easy Cart Checkout Incident Report	Solve
Review the following incident report written QA team of LWB, Little White Book (an e-commerce app): 1. Place any items in the cart (Say “Nike FST Men”). 2. Place any other (different) item in the shopping cart (Say “Nike Air Max”). 3. Remove “Nike FST Men” from the shopping cart, but leave “Nike Air Max” in the cart. 4. Click on “Check out” button. 5. Expect the app to display the check out screen, instead ‘No items in the shopping cart. Click continue to go back to shopping.’ error message is shown as a popup. 6. Click “Continue”. 7. Expect the app to go to shopping screen to add/remove items from the cart. Instead the app crashes. 8. The error in steps 5 and 7 occurred in every attempt of 5 attempts (1 2 3 4 and 6). Which of the following information is missing from the incident report?
Medium Async Await Promises Promises Async-Await Asynchronous Programming	Solve
What will the following code output? A: 24 after 5 seconds and after another 5 seconds, another 24 B: 24 followed by another 24 immediately C: 24 immediately and another 24 after 5 seconds D: After 5 seconds, 24 and 24 E: Undefined F: NaN G: None of these
Medium Bitcoin prices Axios Promises	Solve
Review the following JavaScript code and pick the correct options: Assume that the API returns a successful 200 response code and a JSON object as the response body. What would the value of ‘a’ be after the code is executed?
Medium My Module Scope Javascript Es6 Closure	Solve
What will the output of the following JavaScript code be?
Medium Promise Resolve Promises Async-Await Code Analysis Syntax Understanding	Solve
What does the following code output?
Easy Throw, Try, Async Promises Async-Await Async/await	Solve
What does the following JS code output?

	🧐 Question	🔧 Skill
	Medium Database testcase Regression Testing Regression Testing In Specific Contexts Test Case Analysis	2 mins Testing	Solve
Adaface is developing a new database system called “Helen”. The tester at Adaface developed the following testcase for regression testing: 1. Open Helen 2. Open “Students” database 3. Enter data for “Sid” 4. Set checkpoint 5. Store “Sid” data in “Students” 6. Restart Helen 7. Read “Sid” data from “Students” 8. Compare checkpoint with the contents When the tester ran the testcase the first time, it worked as expected. Pick the correct statements: A: When the test case is ran the second time, the data entry for “Sid” already exists in the database. B: When the test case is ran the second time, it performs exactly as it did the first time C: The testcase is a good example for regression testing “Helen” D: The testcase is not a good example for regression testing “Helen” since the system behaves differently when the testcase is ran the second time
	Medium Decision Table	3 mins Testing	Solve
Check the following decision table: What are the expected actions for following testcases? I: Joey's age is 22. He is a smoker residing in India II: Jennifer's age is 62. She is a non-smoker not residing in India A) I - Insure, 10% discount. II - Insure, no discount B) I - Don't insure. II - Don't insure C) I - Insure, no discount. II - Don't insure D) I - Insure, no discount. II - Insure, 10% discount
	Easy Cart Checkout Incident Report	2 mins Testing	Solve
Review the following incident report written QA team of LWB, Little White Book (an e-commerce app): 1. Place any items in the cart (Say “Nike FST Men”). 2. Place any other (different) item in the shopping cart (Say “Nike Air Max”). 3. Remove “Nike FST Men” from the shopping cart, but leave “Nike Air Max” in the cart. 4. Click on “Check out” button. 5. Expect the app to display the check out screen, instead ‘No items in the shopping cart. Click continue to go back to shopping.’ error message is shown as a popup. 6. Click “Continue”. 7. Expect the app to go to shopping screen to add/remove items from the cart. Instead the app crashes. 8. The error in steps 5 and 7 occurred in every attempt of 5 attempts (1 2 3 4 and 6). Which of the following information is missing from the incident report?
	Medium Async Await Promises Promises Async-Await Asynchronous Programming	2 mins JavaScript	Solve
What will the following code output? A: 24 after 5 seconds and after another 5 seconds, another 24 B: 24 followed by another 24 immediately C: 24 immediately and another 24 after 5 seconds D: After 5 seconds, 24 and 24 E: Undefined F: NaN G: None of these
	Medium Bitcoin prices Axios Promises	2 mins JavaScript	Solve
Review the following JavaScript code and pick the correct options: Assume that the API returns a successful 200 response code and a JSON object as the response body. What would the value of ‘a’ be after the code is executed?
	Medium My Module Scope Javascript Es6 Closure	2 mins JavaScript	Solve
What will the output of the following JavaScript code be?
	Medium Promise Resolve Promises Async-Await Code Analysis Syntax Understanding	2 mins JavaScript	Solve
What does the following code output?
	Easy Throw, Try, Async Promises Async-Await Async/await	2 mins JavaScript	Solve
What does the following JS code output?

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Database testcase Regression Testing Regression Testing In Specific Contexts Test Case Analysis	Testing	Medium	2 mins	Solve
Adaface is developing a new database system called “Helen”. The tester at Adaface developed the following testcase for regression testing: 1. Open Helen 2. Open “Students” database 3. Enter data for “Sid” 4. Set checkpoint 5. Store “Sid” data in “Students” 6. Restart Helen 7. Read “Sid” data from “Students” 8. Compare checkpoint with the contents When the tester ran the testcase the first time, it worked as expected. Pick the correct statements: A: When the test case is ran the second time, the data entry for “Sid” already exists in the database. B: When the test case is ran the second time, it performs exactly as it did the first time C: The testcase is a good example for regression testing “Helen” D: The testcase is not a good example for regression testing “Helen” since the system behaves differently when the testcase is ran the second time
	Decision Table	Testing	Medium	3 mins	Solve
Check the following decision table: What are the expected actions for following testcases? I: Joey's age is 22. He is a smoker residing in India II: Jennifer's age is 62. She is a non-smoker not residing in India A) I - Insure, 10% discount. II - Insure, no discount B) I - Don't insure. II - Don't insure C) I - Insure, no discount. II - Don't insure D) I - Insure, no discount. II - Insure, 10% discount
	Cart Checkout Incident Report	Testing	Easy	2 mins	Solve
Review the following incident report written QA team of LWB, Little White Book (an e-commerce app): 1. Place any items in the cart (Say “Nike FST Men”). 2. Place any other (different) item in the shopping cart (Say “Nike Air Max”). 3. Remove “Nike FST Men” from the shopping cart, but leave “Nike Air Max” in the cart. 4. Click on “Check out” button. 5. Expect the app to display the check out screen, instead ‘No items in the shopping cart. Click continue to go back to shopping.’ error message is shown as a popup. 6. Click “Continue”. 7. Expect the app to go to shopping screen to add/remove items from the cart. Instead the app crashes. 8. The error in steps 5 and 7 occurred in every attempt of 5 attempts (1 2 3 4 and 6). Which of the following information is missing from the incident report?
	Async Await Promises Promises Async-Await Asynchronous Programming	JavaScript	Medium	2 mins	Solve
What will the following code output? A: 24 after 5 seconds and after another 5 seconds, another 24 B: 24 followed by another 24 immediately C: 24 immediately and another 24 after 5 seconds D: After 5 seconds, 24 and 24 E: Undefined F: NaN G: None of these
	Bitcoin prices Axios Promises	JavaScript	Medium	2 mins	Solve
Review the following JavaScript code and pick the correct options: Assume that the API returns a successful 200 response code and a JSON object as the response body. What would the value of ‘a’ be after the code is executed?
	My Module Scope Javascript Es6 Closure	JavaScript	Medium	2 mins	Solve
What will the output of the following JavaScript code be?
	Promise Resolve Promises Async-Await Code Analysis Syntax Understanding	JavaScript	Medium	2 mins	Solve
What does the following code output?
	Throw, Try, Async Promises Async-Await Async/await	JavaScript	Easy	2 mins	Solve
What does the following JS code output?

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We evaluated several of their competitors and found Adaface to be the most compelling. Great library of questions that are designed to test for fit rather than memorization of algorithms.

Swayam Narain, CTO, Affable

Why you should use Pre-employment Mocha Online Test?

The Mocha Online Test provides a streamlined method for evaluating a candidate's grasp of key JavaScript testing concepts. This assessment quickly pinpoints individuals with practical skills applicable to modern web development workflows, saving valuable time in the hiring process. By focusing on real-world application of Mocha and related testing libraries, it helps identify candidates who can contribute to a high-quality codebase from day one.

The questions in this test are crafted to evaluate a junior to intermediate candidate's understanding of testing principles using Mocha, JavaScript, and related testing frameworks. It assesses their capacity to write unit tests, integration tests, and end-to-end tests. The test gauges their ability to utilize Mocha's features effectively, apply testing methodologies and best practices, and comprehend asynchronous testing. Further, it measures their knowledge of testing code for Data Layers, Statistical Layers, and Initializers, evaluating understanding of Test Execution and Mocha Backends. The questions also assess competence with Computation Layer and Utility Layers as well as CPU Backend with Native Extension testing.

Upon completion of the Mocha Online Test, you'll receive a detailed scorecard for each candidate. This report provides a clear breakdown of their skills, allowing you to easily compare candidates and identify the best fit for your team. This data-driven approach allows for better informed hiring decisions and reduces the risk of costly mis-hires.

What topics are covered in the Mocha Online Test?

The Mocha Online Test assesses a candidate's skills across various layers and components critical for building and maintaining effective systems. It helps gauge their understanding of concepts that underpin application architecture and performance.

This evaluation includes Data Layers, which concern the persistence and retrieval of information. A solid understanding here ensures data integrity and availability. Further, the test looks at Statistical Layers, important for deriving insights and making data-driven decisions within an application. The ability to appropriately apply statistical methods is key to analyzing data trends and informing strategy.

We also examine Initializers, the processes responsible for setting up the application environment. This area impacts how smoothly an application starts and integrates with its dependencies. Proficiency in Test Execution ensures the quality of the deliverables through rigorous testing protocols. Understanding Mocha Backends showcases familiarity with testing frameworks and environments, verifying code behaves as expected across various platforms.

Computation Layer expertise reflects the ability to design and implement the core logic of an application. How tasks are processed and algorithms are executed falls under this skill set. Moreover, the test considers Utility Layers, which provide reusable functions that streamline development and promote code maintainability. Finally, the test explores familiarity with CPU Backend with Native Extension, which allows us to understand how candidates handle native code integration and optimize application performance at the hardware level.

Full list of covered topics

The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for Mocha Online Test to be based on.

Data Layers

Data manipulation

Data analysis

Statistical Layers

Statistical analysis

Statistical modeling

Initializers

Setup and configuration

Initialization process

Test Execution

Test planning

Test case design

Test execution process

Mocha Backends

Backend setup

Backend configuration

Backend operations

Computation Layer

Mathematical computations

Algorithm implementation

Data processing

Utility Layers

Utility functions

Helper methods

Code optimization

CPU Backend

Native extension usage

Performance tuning

What roles can I use the Mocha Online Test for?

Node.js Software Engineer
Front-End Developer

How is the Mocha Online Test customized for senior candidates?

For seasoned candidates, the Mocha Online Test adapts to measure their advanced understanding and capabilities in JavaScript testing. The questions are designed to explore their in-depth knowledge of testing methodologies, advanced mocking techniques, and proficiency in performance testing.

The assessment for more experienced individuals explores complex testing scenarios. These may involve in-depth understanding of writing tests for Data Layers, Statistical Layers, and Initializers. It probes their expertise in Test Execution, including Mocha Backends, Computation Layer, Utility Layers and CPU Backend with Native Extension.. The test will evaluate their competence in writing efficient and scalable tests, their aptitude in debugging intricate testing failures, and their familiarity with different testing strategies such as behavior-driven development (BDD) or test-driven development (TDD).

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Non-googleable Questions

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Webcam Proctoring

MCQ Questions

Coding Questions

Typing Questions

Personality Questions

Custom Questions

Ready-to-use Tests

Custom Tests

Custom Branding

Bulk Invites

Public Links

ATS Integrations

Multiple Question Sets

Custom API integrations

Role-based Access

Priority Support

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Have questions about the Mocha Hiring Test?

What is Mocha Online Test?

The Mocha Online Test is designed to assess the knowledge and skills of candidates in various areas related to Mocha. It includes multiple-choice questions on Mocha, Testing, and JavaScript. It is used by recruiters to gauge the proficiency of candidates in these domains.

Can I combine Mocha Online Test with Testing questions?

Yes, recruiters can request a single custom test with multiple skills, including Testing. For more details on how we assess Testing skills, check the Testing Assessment.

What topics are evaluated in the Mocha Online Test?

The Mocha Online Test covers skills such as Data Layers, Statistical Layers, Initializers, Test Execution, Mocha Backends, Computation Layer, Utility Layers, and CPU Backend with Native Extension. For senior roles, it also assesses skills like customizing initializers, developing automated test execution strategies, and implementing custom Mocha backends.

How to use Mocha Online Test in my hiring process?

Use the Mocha Online Test as a pre-screening tool.

Add a link to the assessment in your job post.
Invite candidates by email.
Find skilled candidates earlier.

Can I test JavaScript and Mocha together?

Yes, you can test both JavaScript and Mocha together. This combination is recommended to get a comprehensive understanding of the candidate's skills. Check the JavaScript & Mocha Test for more information.

What are the main JavaScript tests?

Here are some important JavaScript tests:

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.

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

We have the following anti-cheating features in place:

Hidden AI Tools Detection with Honestly
Non-googleable questions
IP proctoring
Screen proctoring
Web proctoring
Webcam proctoring
Plagiarism detection
Secure browser
Copy paste protection

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.

View sample scorecard

Along with scorecards that report the performance of the candidate in detail, you also receive a comparative analysis against the company average and industry standards.

View sample scorecard