8 Questions to Ask About TypeScript in an Interview (With Sample Answers)
TypeScript is a complicated programming language that many professionals, like coders and software developers, use every day. When people apply for jobs that require them to use TypeScript, hiring managers may ask them questions to see how much they know about this programming language. If you know how to talk about this program in an interview, you may have a better chance of getting the job. This article gives you some interview questions about TypeScript that a hiring manager might ask, explains why they might ask them, and gives you some sample answers that you can use to prepare for an interview.8 Questions to Ask About TypeScript
TypeScript questions and some examples of how to answer them
Using TypeScript to make apps often requires special training and a lot of work experience. During an interview for a job that involves technology, an employer may ask about the basics of a program to see if a candidate can do their job well. Here are some interview questions that a hiring manager might ask about TypeScript, along with examples of possible answers:
1. What are the main types in TypeScript?
During interviews for certain tech-related jobs, hiring managers may ask this question to find out how familiar a candidate is with TypeScript. You can also show that you know how TypeScript and JavaScript are related by giving a good answer to this question. Try to name the three primitive types in your answer and maybe say how they are the same as JavaScript’s primitive types.
Example: “Strings, numbers, and booleans are the three basic types in TypeScript. These three kinds are the same as the ones in JavaScript. For instance, the string element can represent values that are made up of words, like “typescript” and “javascript.””
2.How are JavaScript and TypeScript different?
Most candidates who know a lot about TypeScript also know a little bit about JavaScript. TypeScript is based on JavaScript, and employers often look for people who know how to use both languages correctly. In your answer, try to name a few big differences between these two related programming languages.
Example: “One of the most obvious differences between JavaScript and TypeScript is that JavaScript is a scripting language and TypeScript is an object-oriented language. TypeScript also has a feature called “static typing” that lets functions and models with parameters be used. JavaScript can’t do any of these things.”
What are some of the best things about TypeScript?
Most people who work in technology use more than one programming language to do their jobs every day. Employers often check to see if candidates know what makes TypeScript unique and how to use it most effectively. You might want to list at least two of TypeScript’s best features in your answer.
Example: “TypeScript’s ability to run on any browser or JavaScript engine is one of its best features. This programming language is also useful because its syntax and meaning are the same as those of JavaScript. This means that back-end coders can speed up the work of front-end coders.”
4. Which version of TypeScript is the most stable right now, and what do you like about it?
This is a question an interviewer might ask to see how well you know what TypeScript can do now. A hiring manager might ask you if you want to keep your language skills up-to-date and if you have experience with new models. If you know what month and year the new version came out, try to put that information in your answer. Try to learn as much as you can about the topic before your interview so you can talk about current events.
Example: “Version 4.5.2 of TypeScript is the most stable version right now. I like how the part of the language that deals with imports has been improved. It has given developers more control over how types and variables are added.”
5.What types of access modifiers does TypeScript support?
Access modifiers are important because they help programmers organize code and hide implementation details that can be changed in the future. Employers often want to know if you understand the different kinds of access modifiers and know how to put code in the right way into classes and packages. In your answer, try to name the three access modifiers that TypeScript can handle.
Example: “TypeScript has three different kinds of access modifiers: public, protected, and private. All class and child class members, as well as the instance of each class, can use public access modifiers. Protected access modifiers can be accessed by members of the class and its children. The only people who can use private access modifiers are people who are part of a class. If TypeScript doesn’t say what kind of access modifier it is, it’s assumed to be public.”
6. How do you fix a TypeScript file that doesn’t work right?
Employers probably want people who can write code in TypeScript and fix bugs in files that already exist. You can show that you have a lot of skills if you can explain how to fix bugs in existing files. You might want to say in your answer that fixing a TypeScript file is easy.
Example: “Before I start debugging, I look at the.js source map file. Then, I run the.ts file with the –sourcemap flag to make a source map file. A file1.js.map and a file1.js are made during this process. The file1.js is the reference for the source map file, and it is a very important part of the debugging process.”
7. What are generics in TypeScript?
TypeScript has a number of tools, and most employers want to know if candidates know how to use each one. TypeScript Generics is a useful tool that can speed up how things are done. In your answer, try to describe what generics are and how they can help you as a developer or coder.
Example: “With TypeScript Generics, users can make parts of code that can be used more than once. It also helps people write parts that can work with many different kinds of data. I like using generics especially because they make me feel safe.”
8. What is one important rule to follow when using REST parameters?
Rest parameters are hints that tell a function it can take as many arguments as it wants. They are often used in code, so a possible employer may ask if you know how to use them correctly. You might want to include at least one rule about how to use REST parameters in your answer. You can also add more rules to show how well you know them.
Example: “One of the most important rules to follow when using rest parameters is to only use one per function. Other important rules are to make the rest parameter an array type and to put it at the end of your list of parameters.”
