Search test library by skills or roles
⌘ K

TypeScript Online Test

About the test:

The TypeScript test uses scenario-based MCQ questions and code-tracing questions to evaluate a candidate's understanding of Typescript concepts like Types, ES6 Support, OOP (Classes, Modules, Interfaces) and their ability to write asynchronous code with async/await. Along with TypeScript, the test has MCQ questions to evaluate JavaScript fundamentals and coding questions to evaluate hands-on JavaScript coding skills.

Covered skills:

  • JavaScript fundamentals
  • Typescript basics (Types; ES6)
  • Understanding of DOM and web scripting
  • Creating objects using classes
See all covered skills

9 reasons why
9 reasons why

Adaface TypeScript Online Test is the most accurate way to shortlist Full Stack (Typescript) Engineers



Reason #1

Tests for on-the-job skills

The TypeScript Online Assessment Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. The test screens candidates for the typical skills recruiters look for in a TypeScript developer:

  • Types and how to use them
  • Understanding how the TypeScript compiler works
  • ES6 features (Ex: Creating and using arrow functions)
  • Classes, objects, inheritance and encapsulation
  • Namespaces and modules
  • Use Interfaces to define a contract for objects, functions and arrays
  • Generics, Closures and Decorators
  • Asynchronous programming
  • Creating functions that take optional, default and variable number of arguments
  • Analyzing errors and handling exceptions
  • Using Typescript with Webpack to run it inside the browser
  • Creating Dynamic views

Along with TypeScript, code-tracing MCQ questions are used to evaluate JavaScript fundamentals and coding questions to evaluate hands-on JavaScript programming skills.

Reason #2

No trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface ->
Reason #3

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.

These are just a small sample from our library of 10,000+ questions. The actual questions on this TypeScript Online Test will be non-googleable.

🧐 Question

Medium

Alias
OOPs
Solve
What does the following TypeScript code print?
 image
 image

Medium

Truthiness
Narrowing
Solve
We wrote the following TypeScript function to work as global print function. The function needs to handle string input, an array of strings as input or null as an input. In case of string and array of strings, it needs to print them to console. For null input, the code should not print anything.
 image
The function is throwing an error when it is called with null - globalConsole(null). This is happening because typeof null is ‘object’ in JavaScript. Here are two modifications of the code to handle this case:
 image
 image
Pick the correct statements:

A: In the case of null input, globalConsole1 won’t produce any compiler errors like globalConsole
B: In the case of null input, globalConsole2 won’t produce any compiler errors like globalConsole
C: globalConsole1 will differ from globalConsole for an empty string
D: globalConsole2 will differ from globalConsole for an empty string

Medium

Types
Solve
Consider the following TypeScript code: 
 image
Which of the following statements are correct:

A: The typescript compiler confirms that toUpperCase exists on the a instance.
B: The typescript compiler states that the toUpperCase function does not exist on the b instance.
C: The typescript compiler confirms that the toUpperCase function exists on the b instance.
D: RectangleType is an array where the type of a fixed number of elements is known.
E: Variables r, g, b are immutable.
F: r, g, b would compile to same type signature

Medium

Async Await Promises
Promises
Async-Await
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

Easy

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
Solve
What will the output of the following JavaScript code be?
 image
 image

Easy

Promise Resolve
Promises
Async-Await
Solve
What does the following code output?
 image

Easy

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

Easy

Registration Queue
Logic
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

Longest Road
logic
hashmaps
Solve
A startup company E-Motors is building driverless automated cars. The car contains a sensor that checks the road quality for the next N meters to decide the optimal speed at which the cars should move. We are given recorded data by the sensor in the form of an array, where each element of the array is the rating given to 1 meter of the road in sequence. 

The rating given by the sensor is from 1 to 100, where 100 represents the road with the best condition, and any rating above 60 is optimal. Find the longest stretch of road in meters that is categorized as optimal by the sensor.

The input is an array of "strings" which needs to be converted from string to integer/number inside the function.

Medium

Visitors Count
Strings
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

Alias
OOPs
2 mins
TypeScript
Solve

Medium

Truthiness
Narrowing
3 mins
TypeScript
Solve

Medium

Types
2 mins
TypeScript
Solve

Medium

Async Await Promises
Promises
Async-Await
2 mins
JavaScript
Solve

Easy

Bitcoin prices
Axios
Promises
2 mins
JavaScript
Solve

Medium

My Module
Scope
2 mins
JavaScript
Solve

Easy

Promise Resolve
Promises
Async-Await
2 mins
JavaScript
Solve

Easy

Throw, Try, Async
Promises
Async-Await
2 mins
JavaScript
Solve

Easy

Registration Queue
Logic
30 mins
Coding
Solve

Medium

Longest Road
logic
hashmaps
25 mins
Coding
Solve

Medium

Visitors Count
Strings
30 mins
Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Alias
OOPs
TypeScript
Medium2 mins
Solve
Truthiness
Narrowing
TypeScript
Medium3 mins
Solve
Types
TypeScript
Medium2 mins
Solve
Async Await Promises
Promises
Async-Await
JavaScript
Medium2 mins
Solve
Bitcoin prices
Axios
Promises
JavaScript
Easy2 mins
Solve
My Module
Scope
JavaScript
Medium2 mins
Solve
Promise Resolve
Promises
Async-Await
JavaScript
Easy2 mins
Solve
Throw, Try, Async
Promises
Async-Await
JavaScript
Easy2 mins
Solve
Registration Queue
Logic
Coding
Easy30 minsSolve
Longest Road
logic
hashmaps
Coding
Medium25 minsSolve
Visitors Count
Strings
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

Brandon

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!


Brandon Lee, Head of People, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment TypeScript Online Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the TypeScript Online Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

Reason #7

Detailed scorecards & comparative results

Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

Reason #9

Advanced Proctoring


How is the test customized for Senior TypeScript Developers?

The questions will test advanced topics for tests aimed at senior developers. Here are some topics that we use to create advanced Kotlin questions:

  • How to convert Java code into Kotlin
  • Understand how Java and Kotlin programs interoperate
  • Advanced OOP (Interface Classes, Abstract Classes, Generic Classes, Enums in Kotlin)
  • Advanced collections (MapOf, Arrayof, MutableList)
  • Asynchronous programming techniques (Threading, Callbacks, Futures, promises etc)
  • Reactive extensions and Coroutines

What roles can I use the TypeScript Online Test for?

  • Full Stack (Typescript) Engineer
  • Backend Engineer Typescript
  • Frontend Software Developer (TypeScript)
  • Web Developer (TypeScript)
  • Node JS + TypeScript Developer
  • Senior TypeScript Developer
  • Senior Software Engineer (TypeScript)

What topics are covered in the TypeScript Online Test?

Types
Arrays
Tuples
Enums
TypeScript compiler
ES6 features
Arrow functions
Webpack
Dynamic views
Object-oriented programming (OOP)
Classes, methods and properties
Namespaces
Modules
Interfaces
Generics
Decorators
Closures
Access modifiers
Asynchronous programming
Async/Await
Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.


85%
reduction in screening time

Typescript Online Test FAQs

Can I evaluate JavaScript and TypeScript in the same test?

Yes. We support testing multiple skills in the same test. You can review our standard JavaScript test to get a sense of what kind of questions will be included to test JavaScript alone. The final test will include MCQ questions to evaluate TypeScript, JavaScript and coding questions to evaluate JavaScript.

Can I evaluate React and TypeScript in the same test?

Yes. We support testing multiple skills in the same test. You can review our standard React test to get a sense of what kind of questions will be included to test React skills. The final test will include MCQ questions to evaluate React, TypeScript, HTML/ CSS and coding questions.

Can I evaluate VueJS with TypeScript in the same test?

Yes. We support testing multiple skills in the same test. You can review our standard Vue JS test to get a sense of what kind of questions will be included to test Vue skills. The final test will include MCQ questions to evaluate Vue, TypeScript, HTML/ CSS and coding questions.

Can I evaluate Angular with TypeScript in the same test?

Yes. We support testing multiple skills in the same test. You can review our standard Angular test to get a sense of what kind of questions will be included to test Angular skills. The final test will include MCQ questions to evaluate Angular, TypeScript, HTML/ CSS and coding questions.

How is the test customized for Backend NodeJS TypeScript Developers?

The test will include scenario-based MCQ questions to evaluate Node JS, TypeScript, REST skills and coding questions. You can check our standard NodeJS test to understand how we design NodeJS questions.

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.

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
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser

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.

Join 1200+ companies in 75+ countries.
Try the most candidate friendly skills assessment tool today.
Ready to use the Adaface TypeScript Online Test?
Ready to use the Adaface TypeScript Online Test?
Chat with us
40 min tests.
No trick questions.
Accurate shortlisting.
Terms Privacy Trust Guide

🌎 Pick your language

English Norsk Dansk Deutsche Nederlands Svenska Français Español Chinese (简体中文) Italiano Japanese (日本語) Polskie Português Russian (русский)
Ada
Ada
● Online
Previous
Score: NA
Next
✖️