30 Most Commonly Asked Technical Interview Questions

technical interview questions

Technical interview questions is an easy way for an employer, to learn about the technical expertise of his or her prospective employee.

Which ofcourse includes the equipment they use and the practical abilities they possess, during a technical interview.

Interviewers are more focused on your level of knowledge, problem-solving and critical thinking skills, and readiness for the role.

Let’s discuss on the 30 Most Commonly Asked Technical Interview Questions, along with some answers to help you get prepared for your next interview.

We have in this blog post, and tips on how you can answer them.

What is Technical Interview?

The majority of jobs call for a diverse set of job skills, or a mix of hard abilities and soft skills related to the workplace. Technical skills are those you acquire in order to perform a specific task, such as understanding a programming language or using a content management system, whereas workplace skills are those that relate to how you work.

Technical interviews are conducted as part of the hiring process for technology companies and are relevant for roles that include a lot of technology, such engineering, product, or design.

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Under such circumstances, there’s a chance that your technical interview will also include an in-person or online challenge, such a live coding exam or a whiteboard design task.

In order to demonstrate relevant technical abilities, candidates looking for jobs in sales, marketing, finance, or other sectors of the economy might additionally need to go through a technical interview.

Here are The Different Types of Technical Interview Questions

Technical interview questions could cover a broad range of topics, depending on the specific role and industry. These questions are meant to assess the technical proficiency, problem-solving ability, and subject-matter breadth of applicants.

Here are some illustrations of common categories for technical interviews:

Data Structures and Algorithms

Candidates’ understanding of a variety of data structures and algorithms, such as arrays, linked lists, stacks, queues, trees, and graphs, as well as sorting, searching, traversals, and dynamic programming, is tested by these kinds of problems.

It might be necessary for candidates to examine and/or apply time and spatial complexity concepts in their responses to challenges.

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Programming and Coding

This stage is to check an applicant’s ability to produce code and solve problems using programming languages such as Python, Java, C++, or JavaScript.

These could involve solving algorithmic problems, coding riddles, data structures, or writing code to solve specific problems.

The System Design

The system design is to evaluate the persons ability to build and architect large-scale systems. They usually concentrate on the trade-offs, scalability, dependability, and performance of complex systems.

The Architecture of The System

The system focuses on the components and overall structure of a system. They may experience problems with cloud computing, distributed systems, networking, security, and scalability.

SQL and Database

This questions is to check a candidate’s knowledge of database management systems, SQL queries, and database design concepts.

It can be necessary for candidates to create complex queries, optimize queries for speed, or develop database structures.

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Evaluate and Debug

Here the questions assess a candidate’s knowledge of debugging techniques, software testing principles, and troubleshooting skills.

Web Dev

RESTful APIs, HTML, CSS, JavaScript, browser compatibility, and frameworks like Angular or React are among the web technologies addressed by these questions.

It may be necessary for candidates to have experience with web application development or optimization, front-end troubleshooting, or web-related debugging.

Frequently Asked Technical Interview Questions

In a technical interview, questions may be asked in a number of ways, such as:

  • Behabioral Interview Questions
  • Situational Interview Questions
  • Concerns regarding your schooling
  • Questions regarding technical expertise and experience

Continue reading for sample responses to inquiries concerning technical expertise and experience, as well as a discussion of the reasons behind the questions employers ask and the qualities they want.

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Behavioral Interview Questions

Technical interviews typically start with a series of general and behavioral interview questions meant to elicit more information about the candidate and their potential fit with the company’s culture. This is how most interviews start.

It is best to try to use the STAR interview technique when responding to behavioral interview questions by precisely stating the Situation, Task, Action, and Outcome of an experience you have that is pertinent to the subject being asked. Some typical behavioral interview questions for a technical interview are as follows:

  • In the most recent project you worked on, what was your exact role and responsibilities?
  • Which project do you feel most proud of, and what role did you play in it?
  • Which type of work team do you prefer?

Situational Interview Questions

The interviewer may ask you a few situational interview questions after posing a few behavioral interview questions. In these questions, you will be asked to reply to a hypothetical issue or find a solution.

The interviewer uses these questions to find out if you have thought about potential working difficulties and how you would handle them.

By recognizing a comparable circumstance you’ve already experienced, you can utilize the STAR technique to provide a solution to these questions.

During your technical interview, you might anticipate the following typical scenario interview questions:

  • If you were assigned a task and were unsure about how to finish it, how would you respond?
  • Tell me about a moment when you worked on a project and went above and beyond what was required of you.
  • How would you handle the situation if a coworker is challenging to work with on a collaborative project?

Interview Questions for Education

When an interviewer probes about your educational background, they aim to learn more about the particular technical education and training you have had, as well as how it equipped you for the role you are seeking.

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Make sure to include any unique credentials, education, or training you have obtained, as well as any academic achievements pertinent to the position you are applying for, in your response to these questions.

A few typical technical interview questions about your degree are as follows:

In what ways did your schooling equip you for your role?

Which technological credentials do you possess?

How do you maintain your technical qualifications and expertise current?

Examples of Technical Interview Questions and Answers

The interviewer will ask you questions regarding your technical knowledge, skills, and experience after probing more about your educational background and asking you situational and behavioral interview questions.

It’s crucial to demonstrate your ability to explain technical ideas in an understandable way and to outline your work procedures while responding to these questions.

Depending on the technical requirements of the position, you can anticipate different technical interview questions; nonetheless, the following are some typical questions and sample responses:

  • Which programming language do you feel most at ease using?
  • How is a Storage Area Network (SAN) used?
  • When is denormalizing database design appropriate?
  • How do continuous integration systems function inside the automated build process?

Which programming language do you feel most at ease using?

In order to ascertain whether you are comfortable using many languages and whether you have a thorough understanding of the one they require you to use, the interviewer will likely ask you about the coding languages you are familiar with.

It’s crucial to include the precise coding languages you have experience with and feel comfortable using in your response to this question. Next, indicate which particular coding language you feel most at ease using and why.

Example: “JavaScript is the coding language I have the most practical experience working with, although I am proficient with a variety of coding languages, including SQL, Python, C++, and Visual Basic.

I feel most comfortable with JavaScript because it was the first computer language I learnt and I have used it on a number of projects over the past ten years.”

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How is a Storage Area Network (SAN) used?

This interview question assesses your technical proficiency with respect to a particular network that you will need to understand in order to succeed in your position. It’s critical that you explain what SAN is, what it does, and how you would utilize it in the position for which you are seeking in your response to this question.

For instance: “SAN is an acronym for storage area network. Block-level network access to storage is provided by this fast, specialized network. Applications may be made more available, performance can be improved, storage effectiveness can be increased, and data security and protection can be improved using SANs.”

When is denormalizing database design appropriate?

This is a more advanced technical interview question meant to assess your ability to weigh the advantages and disadvantages of using denormalization for database optimization. Denormalization will affect the capabilities of a database, thus it’s critical to outline the benefits and drawbacks of this approach and indicate when it makes sense to apply it.

For instance: “Denormalization is a database optimization technique that enhances the performance of a database for particular queries. When a database needs to be improved in order for it to satisfy the requirements of your application, denormalization can be necessary.

Denormalization will, however, limit the functionality of your database, thus before deciding to utilize it as an optimization strategy, be sure it is required for performance or scalability.”

How do continuous integration systems function inside the automated build process?

This is a question from the interviewer to make sure you know what continuous integration technologies are and how the automated build process uses them. Give a precise definition of continuous integration in your response, followed by an explanation of how the automated build process uses it.

Example: “Developers must integrate code into a shared repository multiple times a day as part of the continuous integration process. Every time the code is incorporated, the automatic build verifies it. This makes it possible to find bugs and other issues in the software early.”

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Interview Techniques in Technical Terms

Here are some more pointers to help you in a technical interview make a strong impression as a candidate:

Describe your Reasoning Pattern

There are definite right answers to many interview questions in technical fields. This implies that you must come up with a strategy to differentiate your response from that of the other applicants.

Making an effort to differentiate yourself from the competition by providing an explanation of how you solve problems and the reasoning behind your solution.

Be familiar with various approaches to problem-solving

Technical interview questions often have multiple valid solutions. When responding to an inquiry with multiple paths to resolution, describe your approach to problem-solving and demonstrate that you are proficient in using each technique.

If you need clarity, ask

It’s acceptable to ask the interviewer for clarification if you require more information to adequately respond to a question they pose. This will demonstrate to the interviewer your ability to recognize when more information is required and your willingness to seek clarification when necessary.

Explain any responses you are unsure of

It’s acceptable to inform the interviewer if you are unsure about the answer to a question that comes up during a technical interview.

But if this were a situation you encountered at work, you ought to go into more detail with your response and describe how you would go about obtaining the information needed to provide an answer.

This will demonstrate to the interviewer your capacity to look up information when you don’t know how to perform things.

Be ready to demonstrate your abilities

A common component of technical interviews is the demonstration of your abilities through a series of brainteasers, remote coding projects, or whiteboard coding tasks.

While this phase often occurs during the second or third interview, it is vital to be prepared for at least one brainteaser question or whiteboard challenge during your first technical interview.

It’s necessary to keep in mind that when answering these questions, you should justify your thinking and the procedures you took to arrive at your conclusion.

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Describe a binary search algorithm’s concept and the complexity of its time

One divide-and-conquer method for effectively searching a sorted array is binary search. Until the target element is located or determined to be absent, it repeatedly cuts the search space in half. Binary search has an O(log n) time complexity since each comparison reduces the search space by half.

Describe linked lists and the advantages they have over arrays

A data structure called a linked list is made up of nodes, each of which has a value and a reference to the node after it. In contrast to arrays, linked lists can insert or remove entries at any location with efficiency and have a dynamic size. On the other hand, linked lists use more memory to store references and have slower access times.

Data that isn’t sorted or that needs to be added to or removed regularly is represented using linked lists. This is so that they can be easily modified without requiring the shifting of other list elements.

The following are some benefits of linked lists over arrays:

Dynamic size: Linked lists don’t require memory pre-allocation; they can expand or contract on their own.

Effective insertion and deletion: Since a linked list simply needs to update the pointers of the impacted nodes, adding or removing members is a fairly efficient operation.

Memory efficiency: When storing data that needs to be added or removed often or is not sorted, linked lists may be a more memory-efficient option than arrays.

Describe the differences between a queue data structure and a stack

Both a queue and a stack are examples of linear data structures, which arrange data in a specific order. Their ability to add and remove pieces, however, is where they diverge.

A last in first out (LIFO) data structure is a stack. This implies that the first piece to be removed from a stack is the last element to be added. The programming method known as recursion, which enables a function to call itself, is frequently implemented using stacks.

A queue is a first in first out (FIFO) data structure. Accordingly, the first element to be withdrawn from a queue is the same one that is first added to it. Queues are frequently used to carry out operations like processing requests and printing jobs.

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What exactly distinguishes HTTP from HTTPS?

Data is transmitted over the internet via the insecure HTTP (hypertext transfer protocol). With the use of SSL/TLS protocols, HTTPS (HTTP secure) is a secure variant of HTTP that offers confidentiality and integrity through data encryption. Web browsers display a padlock icon to denote HTTPS, which is frequently used for secure transactions like online banking and e-commerce. Nonetheless, there are a few significant variations between the two.

Security: The HTTP protocol lacks security. This implies that anybody in the middle of a data transmission over HTTP might intercept and read the data. Conversely, HTTPS is a secure protocol. This indicates that information sent via HTTPS is encrypted and is not readable by anybody residing between the sender and the recipient.

Speed: In general, HTTP is quicker than HTTPS. This is due to the fact that HTTPS incurs more expense due to the need for extra encryption and authentication procedures. Still, the speed difference is usually negligible.

Use: HTTP is utilized for many different things, such as file downloads, media streaming, and website surfing. When performing actions that demand for a higher level of security, such online banking, shopping, and email.

Here are a few instances of HTTPS-enabled websites:

Financial websites: To safeguard client information, including account numbers and passwords, banks employ HTTPS.

E-Commerce websites: To safeguard consumer credit card information, eCommerce websites employ HTTPS.

Email services: To safeguard user messages, email services employ HTTPS.

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What distinguishes integration testing from unit testing?

Whereas integration testing checks the interactions between various components to make sure they function as intended, unit testing concentrates on evaluating individual parts or code units in isolation. At various phases of the development process, both tests are carried out.

Unit testing, a form of software testing, examines individual lines of code to ensure they perform as planned. Code can be divided into smaller components called modules, classes, or functions.

Unit tests are normally written by the developer of the code being tested, and they often make use of a unit testing framework. Integration testing comes after unit testing most of the time.

Due to their simpler detection and repair, defects can now be found and fixed early in the development process by developers.

Frequently Asked Questions About Technical Interview Questions

Are technical interviews challenging?

Technical interviews are difficult, but they’re also manageable. In technical interviews, interviewees assess candidates’ abilities beyond programming.

Which five characteristics should an IT technician possess?

Make sure to keep an eye out for these five essential qualities in a potential hire: self-control, the ability to solve problems, attention to detail, effective communication, and a love of technology.

How can a fresh graduate prepare for technical interviews questions?

Answer: Learn the basics of data structures and algorithms to help you prepare for a technical interview as a new hire. Reread your preferred programming language, practice solving coding challenges, and be prepared to describe how you solve problems. You can also hone your abilities by using online coding platforms and mock interviews.

What is your interview sample introduction?

A professional introduction should begin with a kind salutation, your full name, your educational background, any relevant work experience, a focus on your strongest suit, a synopsis of your career goal, and a statement of thanks for the chance.