JavaScript (Coding): Intermediate Level Algorithms Test

Q: What are the main JavaScript-related tests?

Some important JavaScript-related tests include: JavaScript, HTML/CSS & NodeJS Test JavaScript, HTML/CSS & React Test JavaScript & NodeJS Test

The JavaScript (Coding): Intermediate Level Algorithms Test evaluates a candidate's proficiency in implementing advanced JavaScript concepts and algorithms. It assesses skills in array manipulation, object-oriented and functional programming, asynchronous JavaScript, and ES6+ features. Through coding questions and MCQs, it tests the ability to solve complex problems, optimize code, and apply efficient algorithmic solutions.

Covered skills:

Array Manipulation
Object-Oriented Programming
Functional Programming
Asynchronous JavaScript
ES6+ Features
Data Structures
Algorithm Complexity
Recursion
Sorting and Searching
Dynamic Programming
Memory Management
Debugging and Error Handling

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About the JavaScript (Coding): Intermediate Level Algorithms Assessment Test

The JavaScript (Coding): Intermediate Level Algorithms 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:

Experience with the basic syntax and functions of JavaScript.
Proficient in array manipulation techniques.
Skilled in object-oriented programming concepts.
Ability to apply functional programming paradigms.
Expertise in asynchronous programming, including promises and async/await.
Knowledge of ES6+ features and their applications.
Competence in implementing and managing data structures.
Understanding and analyzing algorithm complexity for performance optimization.
Aptitude for employing recursion in problem-solving.
Capable of implementing various sorting and searching algorithms.
Ability to solve problems using dynamic programming techniques.
Proficiency in managing memory efficiently in JavaScript.
Skilled in debugging and handling errors effectively.

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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 JavaScript (Coding): Intermediate Level Algorithms Test will be non-googleable.

🧐 Question
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 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
	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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Why you should use Pre-employment JavaScript (Coding): Intermediate Level Algorithms Test?

The JavaScript (Coding): Intermediate Level Algorithms Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

Manipulating arrays and collections
Creating and using JavaScript objects
Implementing array sorting algorithms
Utilizing ES6+ features like let and const
Writing and invoking nested functions
Handling promises and async/await
Working with JavaScript closures
Understanding callback functions
Parsing and manipulating JSON data
Debugging and fixing code issues

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the JavaScript (Coding): Intermediate Level Algorithms Test?

Array Manipulation: Array manipulation involves modifying, transforming, and analyzing arrays efficiently. It's crucial for data processing and algorithm implementation. Mastery of array methods and operations is essential for writing optimized JavaScript code.

Object-Oriented Programming: OOP is a programming paradigm that uses objects to structure code. It emphasizes concepts like encapsulation, inheritance, and polymorphism. Proficiency in OOP leads to more maintainable and scalable JavaScript applications.

Functional Programming: Functional programming focuses on using pure functions and immutable data. It promotes code clarity, testability, and parallel execution. This paradigm is increasingly important in modern JavaScript development.

Asynchronous JavaScript: Asynchronous JavaScript handles non-blocking operations like API calls and file I/O. It uses mechanisms such as callbacks, promises, and async/await. Proficiency in async programming is crucial for building responsive web applications.

ES6+ Features: ES6+ includes modern JavaScript features like arrow functions, destructuring, and modules. These features enhance code readability and developer productivity. Understanding ES6+ is essential for writing contemporary JavaScript code.

Data Structures: Data structures are specialized formats for organizing and storing data. They include arrays, linked lists, trees, and graphs. Efficient use of data structures is fundamental to writing performant algorithms.

Algorithm Complexity: Algorithm complexity analyzes the efficiency of algorithms in terms of time and space. It involves concepts like Big O notation. Understanding complexity helps in choosing optimal solutions for different programming challenges.

Recursion: Recursion is a technique where a function calls itself to solve a problem. It's often used for tasks that have a recursive nature, like tree traversal. Mastering recursion is crucial for solving complex algorithmic problems.

Sorting and Searching: Sorting arranges data in a specific order, while searching finds specific elements in a dataset. These fundamental operations are critical in many applications. Knowledge of various sorting and searching algorithms is essential for efficient data manipulation.

Dynamic Programming: Dynamic programming is an optimization technique that solves complex problems by breaking them into simpler subproblems. It's used in various fields including artificial intelligence and economics. This skill is valuable for tackling computationally intensive tasks.

Memory Management: Memory management involves controlling and coordinating application memory allocation. In JavaScript, it includes understanding concepts like garbage collection and memory leaks. Efficient memory management is crucial for developing high-performance applications.

Debugging and Error Handling: Debugging identifies and fixes errors in code. Error handling manages and responds to runtime errors gracefully. These skills are essential for developing robust and reliable JavaScript applications.

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 JavaScript (Coding): Intermediate Level Algorithms Test to be based on.

Array Methods

Spread Operator

Rest Parameters

Object Creation

Prototypes

Classes

Inheritance

Immutability

Higher-Order Functions

Closures

Currying

Promise API

Async/Await

Generators

Modules

Destructuring

Template Literals

Arrow Functions

Map Data Structure

Set Data Structure

WeakMap

WeakSet

Binary Search

Merge Sort

Quick Sort

Bubble Sort

Linked Lists

Stacks

Queues

Tree Traversal

Graph Traversal

Big O Notation

Time Complexity

Space Complexity

Memoization

Tabulation

Garbage Collection

Memory Leaks

Event Loop

Async Event Handling

Try/Catch

Custom Errors

Unit Testing

Integration Testing

Refactoring

Functional Composition

Pure Functions

Event Delegation

What roles can I use the JavaScript (Coding): Intermediate Level Algorithms Test for?

Front-end Developer
Full-stack Developer
JavaScript Developer
Web Application Developer
Software Engineer
UI Developer
Node.js Developer
React Developer
Angular Developer
Vue.js Developer

How is the JavaScript (Coding): Intermediate Level Algorithms Test customized for senior candidates?

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

Designing object-oriented JavaScript code
Creating and using JavaScript classes
Managing memory using garbage collection
Optimizing algorithm complexity in code
Implementing advanced sorting algorithms
Applying dynamic programming techniques
Handling recursion efficiently
Integrating data structures like stacks
Using iterative and recursive techniques
Conducting efficient searching algorithms

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

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Have questions about the JavaScript (Coding): Intermediate Level Algorithms Hiring Test?

What is the JavaScript (Coding): Intermediate Level Algorithms Test?

The JavaScript (Coding): Intermediate Level Algorithms Test is designed to assess a candidate's ability to solve intermediate-level algorithmic problems in JavaScript. It is commonly used by recruiters to evaluate candidates for roles requiring strong JavaScript knowledge and problem-solving skills.

Can I combine the JavaScript (Coding): Intermediate Level Algorithms Test with another skill?

Yes, recruiters can request a custom test combining skills. For example, you can combine it with the JavaScript & NodeJS Test to evaluate both JavaScript and NodeJS skills.

What topics are covered in the JavaScript (Coding): Intermediate Level Algorithms Test?

The test covers topics such as Data Structures, Algorithms, Asynchronous Programming, Error Handling, Functions and Scope, Array and String Manipulation, Object-Oriented Programming, Closures and Higher-Order Functions, Promises and Async/Await, Event Loop and Callbacks, Time Complexity and Optimization.

How to use the JavaScript (Coding): Intermediate Level Algorithms Test in my hiring process?

Use this test as a pre-screening tool at the start of recruitment. Add a link to the assessment in your job post or invite candidates via email to reliably identify the most skilled candidates early.

Can I test JavaScript and NodeJS together in a test?

Yes, you can test both JavaScript and NodeJS skills together. Refer to the JavaScript & NodeJS Test for more details.

What are the main JavaScript-related tests?

Some important JavaScript-related tests include:

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:

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?

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Can I get a free trial?

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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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