Most Difficult Javascript Interview Questions

Michael Zippo 04.11.2021

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Information technology is one of the most profitable and rewarding areas of business. But before you get that awesome CS gig, you need to go through the application process. That’s why we’ve put together this guide - to help you prepare for the most common IT interview questions.

With the growing tech industry, computer science has become a popular career choice for many students. Common roles for which computer science graduates apply are: computer engineer, computer engineer, software development engineer, computer software developer, and application engineer.

Computer Science is one of the most profitable graduates ; s through engineering, mathematics, science and business. As a computer science graduate, you can earn an average salary of $ 50 - $ 130,000 per year . In this area, you will also have great potential for growth as salaries for IT professionals are known to increase dramatically from year to year.

Computer technical interview questions

A person speaking in an interview. — Being good at a technical interview can be the difference between getting hired or fired .

JavaScript is my favorite language because it is easy to use and my main choice for final back-development. Before JavaScript websites were static, however after JS the web equation changed. Now with JS we have features that help build user friendly and vibrant websites. Here are a few reasons why JS is my favorite programming language to work with.

What is a class and a superclass?

The answer to this question is similar to the others should be at the beginning of the language. You can answer this question as follows:

A class defines the project from which the class objects are created example, the characteristics of an object and with which methods and variables it is associated. A super class, on the other hand, refers to the considered direct class.

What is the difference between Process and Thread?

Although a process and a thread may seem conceptually similar, the two are independent sequences of execution. You can answer this question as follows:

Process is a running program. The thread is a segment of a process, which means that a process can have multiple threads.

Compared to a thread, the process takes longer to complete. The process also takes longer to create while the thread takes less time. The process is isolated while the threads share memory.

What is a constructor?

In object oriented programming, a constructor is a method of a class or structure and initializes an object of that type. Your answer might look like this:

Most of the CS interview questions as discussed above will revolve around similar concepts.

Common questions for IT interviews

What is a message ?

What is a feed ?

How many types of access modifiers are there ? Name and define each of them.

What is the application layer?

Name the main types of constructors.

Explains some main types of access modifiers.

What is the transport layer?

What is the difference between an interface and an abstract class?

Describe a singleton class.

What is an abstract class ?

What is an abstract keyword ?

Provide C source code

What is a byte stream ?

Name a type of balanced binary tree. It explains how it is implemented.

What is a view?

How does the central processing unit (CPU) work in a computer system?

What is GitHub, and how do you use it ?

Explain how a wrapper class works.

What is an array ?

What does a system work ? Give some examples of common operating systems in use today.

Comparison of method and constructor.

What is a data structure ?

List the steps for creating an object.

Explains the purpose of the data link layer.

What is recursion?

Explain the difference between overload and overwrite.

What JavaScript frameworks do you know?

What do you know about the software development cycle?

What is polymorphism?

Here are some examples of technical interview questions you can expect at your next interview. The best way to prepare would be to review basic CS concepts first. Then, start to compare concepts, identify similarities and differences, and understand the structure and components involved in each concept. You should also check websites like Glassdoor for the types of questions asked of previous applicants for a similar position.

If you are in an interviewee, the interviewer may ask you to answer questions on a whiteboard. . These whiteboard interview questions often ask you to troubleshoot programming issues in real time. In a telephone interview, however, the goal will be to provide your understanding of the concepts and their application.

Behavioral interview questions
When preparing for an IT interview, do not assume that the hiring manager will only ask questions. technical issues. The behavioral interview questions have become an important part of the recruiting process in most companies. This applies to both tech giants and startups.

Behavioral questions are typically worded like this:

Tell me about a time when ...
Describe a situation where ...

Give me an example of a time ...

The purpose of the behavioral questions is to allow the employer to understand the results you have obtained in your past work experience. For example, how you applied your knowledge and skills from your previous job to take concrete " action ‚". This action could be a task that you completed successfully, a team that you managed, or an actual issue that you resolved.

The interviewer can also ask general questions. For example:

What am I your greatest strengths and weaknesses ?

Describe a situation in which you would seek help for something you do not understand. So, describe a situation where you might find the solution on your own. Why ?

Why you are leaving your current position < / a> ?

Why are you applying for this position ?

How do you manage multiple projects ?

Tell me about a time you disagreed with a colleague. How did you handle the situation ?

Make sure to review your resume several times before the interview so that you can answer any resume-related questions as well.

Ask your questions
The hard part is over ; however, the last part that a lot of people also tend not to pay a lot of attention is very important. In this final step, you can show the interviewer that you are interested in the job and that you have been attentive throughout the interview process.

So at the end when an interviewer asks "Do you have questions for me?" You should always have a list of 2-3 questions. You can ask a follow-up question based on the job description or ask questions about the team.