Labmentix Interview Questions and Answers

I chose web development for its creativity, impact, and the opportunity to solve real-world problems through technology.

• Web development allows me to combine creativity with technical skills, creating visually appealing and functional websites.

• The web is a powerful platform for reaching a global audience, enabling me to make a positive impact on people's lives.

• I enjoy the problem-solving aspect of web development, ...read more

An API (Application Programming Interface) allows different software applications to communicate and interact with each other.

• APIs define a set of rules and protocols for building and interacting with software applications.

• They enable data exchange between different systems, such as a web server and a client application.

• For example, a weather API allows developers to access weather data for their applications.

• APIs...read more

Error handling in Express involves middleware, try-catch blocks, and custom error responses to manage application errors effectively.

• Use middleware for centralized error handling: `app.use((err, req, res, next) => { ... })`.

• Implement try-catch blocks in async route handlers to catch errors: `async (req, res, next) => { try { ... } catch (err) { next(err); } }`.

• Send appropriate HTTP status codes and messages:...read more

PUT replaces the entire resource, while PATCH updates only specific fields of a resource.

• PUT is idempotent, meaning multiple identical requests have the same effect as a single request.

• PATCH is not necessarily idempotent; multiple identical requests may have different effects.

• Example of PUT: Sending a complete user object to update all fields.

• Example of PATCH: Sending only the email field to update a user's email ...read more

The virtual DOM is a lightweight representation of the actual DOM, enabling efficient updates in React applications.

• The virtual DOM is a JavaScript object that mirrors the structure of the real DOM.

• React uses the virtual DOM to optimize rendering by minimizing direct manipulations of the real DOM.

• When a component's state changes, React creates a new virtual DOM tree and compares it with the previous one.

• This compa...read more

I am familiar with several technical languages essential for web development, including HTML, CSS, JavaScript, and Python.

• HTML: Used for structuring web pages. Example: Creating the layout of a website.

• CSS: Styles the appearance of web pages. Example: Designing responsive layouts.

• JavaScript: Adds interactivity to web pages. Example: Implementing dynamic content updates.

• Python: Used for backend development. Example...read more

My big goal is to create impactful web applications, while my small goal is to continuously improve my coding skills daily.

• Big Goal: Develop a web platform that connects local businesses with customers, enhancing community engagement.

• Small Goal: Dedicate at least 30 minutes each day to learning new web technologies or frameworks.

• Big Goal: Contribute to open-source projects that address social issues, like educatio...read more

To delete duplicates in SQL, use techniques like CTEs, ROW_NUMBER(), or DELETE with a subquery.

• Use a Common Table Expression (CTE) with ROW_NUMBER() to identify duplicates.

• Example: WITH CTE AS (SELECT *, ROW_NUMBER() OVER (PARTITION BY column_name ORDER BY id) AS rn FROM table_name) DELETE FROM CTE WHERE rn > 1.

• Alternatively, use DELETE with a subquery to remove duplicates based on a unique identifier.

• Example: ...read more