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Technical Aptitude & JavaScript Online Test

The Technical Aptitude & JavaScript Online Test uses scenario-based MCQs to evaluate candidates on their technical aptitude, logical reasoning, and JavaScript programming skills. The test assesses candidates' understanding of topics such as data structures, algorithms, programming paradigms, syntax, and programming logic, as well as their proficiency in using JavaScript to solve programming problems. Candidates are evaluated on their ability to analyze problems, identify patterns, and develop effective solutions using programming concepts, as well as their proficiency in using JavaScript to write functional code.

Covered skills:

  • JavaScript basics
  • Errors and Exception Handling in JS
  • ES6
  • Structuring and styling HTML DOM
  • Programming fundamentals
  • Algorithm Basics
  • Data Structures
  • JavaScript Programming
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About the Technical Aptitude & JavaScript Test


The Technical Aptitude & JavaScript 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:

  • Efficiently handle exceptions and errors
  • Demonstrate knowledge of ES6 features
  • Effectively structure and style HTML DOM
  • Apply programming fundamentals
  • Understand algorithm basics
  • Implement various data structures
  • Write JavaScript programs
  • Utilize JavaScript's basic syntax and functions
  • Apply JavaScript programming concepts

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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 Technical Aptitude & JavaScript Test will be non-googleable.

🧐 Question

Medium

Decryptor
Strings
Solve
What does the following pseudo code print?
 image

Hard

Fibonacci codes
Time Complexity
Pseudo Code
Algorithm Analysis
Solve
Here are three pseudocodes for calculating the Nth Fibonacci number. Which of the following statements about these codes are true?
 image
A: Time complexity/efficiency of CODE 1, CODE 2, CODE 3 is the same.
B: CODE 2 is more space-efficient than CODE 3.
C: CODE 3 is more space-efficient than CODE 2.
D: CODE 2 is more time-efficient than CODE 1.
E: CODE 3 is more time-efficient than CODE 1.

Hard

Palindrome Test cases
Strings
Solve
Go through the following faulty palindrome detection pseudocode and test cases. For which of the test cases would the code return true?
 image
Testcases
A: a
B: aba
C: aaa
D: aac

Medium

Rewards Activities Order
Database Connection
Concurrency
Transaction Management
Solve
A new popular app tracks the activities performed by its users and grants them rewards based on each individual's total activities performed in a year. This data is maintained in a database table (activitesinfo), with the following columns: userid, totalactivities, reward. This year, due to fundraising activity, the company has decided to further reward its users by enhancing the reward as per the following formula: If reward < = 4000, increase it by 2%, If 4000 < reward <= 8000, increase it by 4%, If reward > 8000, increase it by 6%.
The tech team has written three different scripts to calculate increment for each slab, each script is to run as a separate transaction. Here are the three scripts:
Script 1:
For users with reward <= 4000, set reward = reward * 1.02

Script 2:
For users with reward > 4000 and reward <= 8000, set reward = reward * 1.04

Script 3:
For users with reward > 8000, set reward = reward * 1.06
Each script is to be executed separately. Which of the following options will update the rewards as expected:
A: Execute Script 1 followed by Script 2 followed by Script 3
B: Execute Script 2 followed by Script 3; Script 1 running concurrently throughout
C: Execute Script 3 followed by Script 2; Script 1 running concurrently throughout
D: Execute Script 3 followed by Script 2 followed by Script 1
E: Execute Script 2 followed by Script 3 followed by Script 1

Medium

Async Await Promises
Promises
Async-Await
Asynchronous Programming
Solve
What will the following code output?
 image
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: 
 image
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?
 image
 image

Medium

Promise Resolve
Promises
Async-Await
Code Analysis
Syntax Understanding
Solve
What does the following code output? 
 image

Easy

Throw, Try, Async
Promises
Async-Await
Async/await
Solve
What does the following JS code output?
 image

Easy

Registration Queue
Logic
Queues
Sorting By Custom Order
Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.
For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.
⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
5
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10

Medium

Visitors Count
Strings
Logic
String Parsing
Character Counting
Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 
Example:

Input:
WWMMWWCCC

Expected Output: 
4W3C2M

Explanation: 
‘W’ has the highest count, then ‘C’, then ‘M’. 
⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.
🧐 Question🔧 Skill

Medium

Decryptor
Strings

2 mins

Technical Aptitude
Solve

Hard

Fibonacci codes
Time Complexity
Pseudo Code
Algorithm Analysis

2 mins

Technical Aptitude
Solve

Hard

Palindrome Test cases
Strings

2 mins

Technical Aptitude
Solve

Medium

Rewards Activities Order
Database Connection
Concurrency
Transaction Management

3 mins

Technical Aptitude
Solve

Medium

Async Await Promises
Promises
Async-Await
Asynchronous Programming

2 mins

JavaScript
Solve

Medium

Bitcoin prices
Axios
Promises

2 mins

JavaScript
Solve

Medium

My Module
Scope
Javascript Es6
Closure

2 mins

JavaScript
Solve

Medium

Promise Resolve
Promises
Async-Await
Code Analysis
Syntax Understanding

2 mins

JavaScript
Solve

Easy

Throw, Try, Async
Promises
Async-Await
Async/await

2 mins

JavaScript
Solve

Easy

Registration Queue
Logic
Queues
Sorting By Custom Order

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic
String Parsing
Character Counting

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Decryptor
Strings
Technical Aptitude
Medium2 mins
Solve
Fibonacci codes
Time Complexity
Pseudo Code
Algorithm Analysis
Technical Aptitude
Hard2 mins
Solve
Palindrome Test cases
Strings
Technical Aptitude
Hard2 mins
Solve
Rewards Activities Order
Database Connection
Concurrency
Transaction Management
Technical Aptitude
Medium3 mins
Solve
Async Await Promises
Promises
Async-Await
Asynchronous Programming
JavaScript
Medium2 mins
Solve
Bitcoin prices
Axios
Promises
JavaScript
Medium2 mins
Solve
My Module
Scope
Javascript Es6
Closure
JavaScript
Medium2 mins
Solve
Promise Resolve
Promises
Async-Await
Code Analysis
Syntax Understanding
JavaScript
Medium2 mins
Solve
Throw, Try, Async
Promises
Async-Await
Async/await
JavaScript
Easy2 mins
Solve
Registration Queue
Logic
Queues
Sorting By Custom Order
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
String Parsing
Character Counting
Coding
Medium30 minsSolve
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Why you should use Pre-employment Technical Aptitude & JavaScript Online Test?

The Technical Aptitude & JavaScript 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:

  • Understanding and using JavaScript basics effectively
  • Handling errors and exceptions in JavaScript
  • Applying ES6 concepts in JavaScript development
  • Structuring and styling HTML DOM elements using JavaScript
  • Demonstrating programming fundamentals in JavaScript
  • Implementing algorithm basics in JavaScript
  • Working with various data structures in JavaScript
  • Writing efficient JavaScript programs
  • Utilizing JavaScript libraries and frameworks effectively
  • Debugging and troubleshooting JavaScript code

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 Technical Aptitude & JavaScript Online Test?

JavaScript basics: JavaScript basics refers to the fundamental concepts and syntax of the JavaScript programming language. This skill should be measured in the test to determine a candidate's knowledge and understanding of the core principles of JavaScript, such as variables, data types, operators, and control flow.

Errors and Exception Handling in JS: Errors and Exception Handling in JavaScript involves identifying and handling errors and exceptions that can occur during code execution. This skill should be measured in the test to assess a candidate's ability to handle and debug errors effectively, ensuring robustness and reliability of JavaScript applications.

ES6: ES6, also known as ECMAScript 2015, is an important update to the JavaScript language, introducing new features and improvements. This skill should be measured in the test to evaluate a candidate's familiarity with ES6 concepts, such as arrow functions, template literals, destructuring, and modules, which are widely used in modern JavaScript development.

Structuring and styling HTML DOM: Structuring and styling HTML DOM (Document Object Model) involves manipulating and organizing the elements of a webpage using JavaScript. This skill should be measured in the test to gauge a candidate's ability to dynamically update and modify the structure, content, and appearance of a webpage, enhancing user experience and interactivity.

Programming fundamentals: Programming fundamentals encompass the foundational principles of coding, including problem-solving techniques, algorithms, and logic. This skill should be measured in the test to assess a candidate's ability to think critically, approach problems systematically, and write clean and concise code, essential qualities for a competent JavaScript developer.

Algorithm Basics: Algorithm Basics involve understanding and implementing common algorithms and data structures, such as searching, sorting, and linked lists. This skill should be measured in the test to evaluate a candidate's knowledge and proficiency in leveraging algorithms and data structures to optimize code performance and solve complex problems effectively.

Data Structures: Data Structures refer to the organization and storage of data in a computer system. This skill should be measured in the test to assess a candidate's familiarity with different data structures, such as arrays, objects, stacks, queues, and trees, and their ability to choose and implement appropriate data structures based on the specific requirements of a JavaScript application.

JavaScript Programming: JavaScript Programming involves the implementation and execution of JavaScript code to create interactive and dynamic web applications. This skill should be measured in the test to evaluate a candidate's proficiency in writing efficient and reliable JavaScript code, ensuring functionality, performance, and maintainability of web 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 Technical Aptitude & JavaScript Test to be based on.

Variables
Data Types
Operators
Conditional Statements
Loops
Functions
Arrays
Objects
Strings
Regular Expressions
Scope
Closures
Prototype and Inheritance
Promises
Async/Await
Modules
Classes
Destructuring
Arrow Functions
Template Literals
Spread and Rest Operators
Array Methods (e.g., forEach, map, filter, reduce)
DOM Manipulation
Event Handling
Selectors
Styling with CSS
Error Types
Exception Handling Techniques
Debugging
ESLint and Code Formatting
Coding Conventions
Using let and const
Default Parameters
Import and Export
Callback Functions
Recursion
Sorting Algorithms
Searching Algorithms
Linked Lists
Stacks
Queues
Binary Trees
Graphs
Hash Tables
Linear Search
Binary Search
Bubble Sort
Insertion Sort
Selection Sort
Merge Sort
Quick Sort
Heap Sort

What roles can I use the Technical Aptitude & JavaScript Online Test for?

  • Front-end Developer
  • Web Developer
  • UI Developer
  • JavaScript Developer

How is the Technical Aptitude & JavaScript Online 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

  • Optimizing JavaScript code for better performance
  • Implementing security measures in JavaScript applications
  • Integrating JavaScript with other web technologies
  • Creating interactive web interfaces using JavaScript
  • Utilizing JavaScript for web scraping and automation tasks
  • Applying object-oriented programming principles in JavaScript
  • Using JavaScript to manipulate and validate data
  • Implementing design patterns in JavaScript
  • Working with RESTful APIs using JavaScript
  • Implementing test-driven development (TDD) in JavaScript

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 Technical Aptitude & JavaScript Hiring Test?

What is the Technical Aptitude & JavaScript Test?

The Technical Aptitude & JavaScript Test assesses a candidate's proficiency in JavaScript and their technical aptitude. It's used by recruiters to identify competent developers for roles requiring these skills.

Can I combine a Technical Aptitude & JavaScript Test with other questions?

Yes, recruiters can request a custom test with multiple skills. For instance, you can include questions from our JavaScript & NodeJS Test for a more comprehensive evaluation.

What topics are evaluated in the Technical Aptitude & JavaScript Test?

The test covers JavaScript basics, Errors and Exception Handling in JS, ES6, Structuring and styling HTML DOM, Programming fundamentals, Algorithm Basics, Data Structures, and JavaScript Programming.

How to use the Technical Aptitude & JavaScript Test in my hiring process?

Use this test as a pre-screening tool. You can add a link to the assessment in your job post or invite candidates via email. It helps in identifying skilled candidates early in the hiring process.

Can I test JavaScript and NodeJS together in a test?

Yes, you can. We recommend our JavaScript & NodeJS Test for a comprehensive evaluation of both skills in one test.

What are the main 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:

  • 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.

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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.

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