In 2025, the job market for Software Engineering is highly competitive, so in order to have the best chance for success, you need to be as prepared as possible for your interview, and go over common interview questions. In this blog post, I am going to cover some of the most common ones so that you can stand out as a top candidate.
How to Prepare for Your Interview
In order to properly prepare for your interview, you need to closely read the job description to determine what type of software engineering job you applied for. If you applied to a front-end position, you will need to brush up on skills like React, and Tailwind. Read the description and familiarize yourself with their tech stack.
5 Common Front End Questions:
- What is a CDN?
Answer: CDN stands for content delivery network and it is a system that delivers content to users based on their geograhpical location. This can be used to reduce latency and improve loading times. CDNs can also be used to improve security, such as protecting against DDos attacks.
- What is the difference between let, var, and const?
Answer: let, var and const are keywords used to define variables in JavaScript. The difference between them is the scoping of the variable once you assign it. For example, let is used to block scope your variable, meaning that it is only avaiable to be used inside of the braces or block that you assigned it. Var is function scoped, meaning that it can be used anywhere within the function that you declared that variable. And lastly, const is also block scoped, but it's utility comes more from the fact that it is used to declare that the variable cannot be reassigned, or changed.
- What is virtual DOM in React?
Answer: DOM stands for Document Object Model in HTML. In React, there is a Virtual DOM that is exactly like the standard DOM, but the difference is React updates the Virtual DOM which is like a clone of the regular DOM. The virtual DOM then only updates what was changed in the regular DOM because updating the whole DOM on re-renders would give slow performance.
5 Common Full Stack Questions:
5 Soft Skills Questions:
Conclusion
After reviewing these questions, you will be more prepared for your software engineering interview. If you combine these answers with practicing coding skills, you should remain sharp for the call! Good luck and godspeed.