ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

How to Pass Coding Interview

Updated on July 27, 2020
FelishiyaPS profile image

Prachi works as a full-stack developer, specialized in e-commerce and mobile app development.

IT sector, especially software development field, is one of the most rewarding job markets and extremely competitive too. Besides mastering the required technical skills, it is equally important to prepare oneself for the technical interview. A technical interview mainly focuses on the kind of projects you have developed; their short introductions and discussions, in-depth knowledge of frameworks you have used and coding skills to have an estimate of your problem solving and algorithm writing techniques. There are five key rules, listed below, that can help you to nail the interview:

Do a thorough research on the company

Knowing about company details and their way of working is a key to crack any interview:

  • Grab an idea about what kind of technologies and framework they work with.
  • What are their five year plans?
  • What kind of domains and markets do they function with?

Getting enough knowledge about the company will help to get into a healthy conversation with the interviewer. It will also show your keen interest in the company, making you chances of getting hired more favorable. This also helps you know if you skills perfectly align with the requirements.

While searching the details about the company, keep in mind these following points:

  • Look for them on LinkedIn, especially your interviewer. Learning a little about them will help you channelize your answers in a better way, understandable by the interviewer.
  • For example, an HR person may not understand jargon, but an IT person would fully appreciate it.

It shows respect if you use interviewer’s name during the interview process. Also, it makes him/her believe that you have great interest in working with them.

First impression is everything

No one gets a second chance to perfect their first impression. So, be confident enough to present yourself with great enthusiasm and positive energy.

Small things such as a strong handshake and eye contact positively impact the interviewer’s thoughts about you.

Besides coding and putting your head into machines for long hours, today’s software development world need engineers who are not only efficient in these tasks, but also have the capability to work with other developers, business teams and stakeholders.

Being a master in technical skills is the foremost important thing, but you must not neglect the bonus point, you can achieve with your smooth communication skills.

Be in sync with your interviewer’s body language

Body language is a window to the soul both in social as well as professional interactions.

  • Maintain a good posture always. It enhances your personality.
  • Avoid interruptions and get rid of distracting behavior.
  • Make use of hand gestures, only when it is appropriate.

For instance, you may notice your interviewer becoming overwhelmed due to long and boring answers or clearing their throat. If you can follow their body language signals, then you can empathize with them and keep them engaged through your good momentum. It is quite a basic thing that can turn a poor interview into a better one.

Explain your Project

Technical interviews will judge your skills on the basis of your project. Talk about it in detail from high-level to low-level.

Normally, an interviewer will ask you to explain your project, which you added in your resume. Answer the high-level questions with high-level technical answers.

The best way is to start explaining from the front of the software / application and then, proceed further with the different tiers and modules that exist in your project and then, finally to the database, where information is stored either encrypted or non-encrypted.

Let us take an example, you may explain, “The front-end of my website is written in HTML designed with Bootstrap CSS, which send HTTP request to the server using node js. On the serve side, I have implemented Spring MVC controllers to handle the request, process it via JAVA and store or fetch data into / from MySql through Hibernate. I deployed my application onto AWS (Amazon Web Service) using RDS and EC2 services and an Apache container.” Utilizing the technical terms, buzz words and frameworks in your explanation will show your deep understanding with the software development process.

Prepare yourself for a Coding Challenge

If the job requirement is for a developer position, then be ready to go through coding challenges. There are high chances that the interviewer will ask you to write a code to test your logical skills. The test can be done either on whiteboard or on editing tool over the Internet. Most of the times, coding challenges are quite easy and can be done within a very short span of time. It is just to check your basic knowledge about the technology. Here are some examples of most common coding questions:

  • Write an algorithm to reverse String using String only functions
  • Write an algorithm to sort array either in a descending or in an ascending order.
  • Write a SQL query to find the employee with the third lowest salary.
  • Write a SQL query to find out employee names who have resigned and their age is less than 30.

Before putting up your thoughts to write a code, always ask the questions to make the requirements clear. Note them down somewhere. It is recommended to initiate the challenge by first drawing the diagrams and process flow, which shows that you have deeply understood the question. This is how the developers deal with real-life problems. Make sure your solution is short and quick to maintain interviewer’s interest and also explain why this is the best solution by taking space and time complexities into consideration.

Last but not the least

Interviews, either good or bad, will always be a part of your career. Each of them is a way to learn something new and there is no short cut to make every interview successful. Always give your best; make sure you know the company well before facing the interviewer, you have amazing body language and full confidence to leave an unforgettable first impression. You have thorough knowledge of your project from scratch and are well aware of technical terms.

Be Prepared. Do your Best. Good Luck!


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
    ClickscoThis is a data management platform studying reader behavior (Privacy Policy)