javascript

Javascript

react

ReactJS

node

NodeJS

typescript

TypeScript

CSS covers styling and layout in frontend development—how a website looks and adapts. It includes selectors and the cascade, box model, positioning and Flexbox/Grid, typography and colors, responsive design (media/container queries), animations/transitions, and building reusable UI themes and components.

Develop and maintain iOS mobile applications using UIKit and SwiftUI · Design and implement new features, optimize and refactor existing code

swift

Swift (IOS Developer)

python

Python

soft-skills

Soft Skills

Frontend System Design is a hard skill—it’s about technical architecture.
But it’s evaluated alongside soft skills (communication & trade-off reasoning).
App architecture & state strategy (SPA/MPA, SSR/ISR, microfrontends)
Performance budgets, caching, CDN/edge, code-splitting
API contracts, schema/versioning, error handling & resiliency
Design system architecture, accessibility, i18n
Testing strategy, observability, security, and deployments

frontend-system-design

Frontend System Design

SQL Databases questions evaluate a candidate’s understanding of relational data, querying, joins, indexing, normalization, transactions, and performance optimization. These questions help assess how well a developer can design database structures, write efficient queries, and work with real-world data reliably.

sqldatabase

SQL databases

Category focused on command-line skills, shell scripting, and everyday terminal usage for developers. It covers working with files, processes, permissions, pipes, redirection, and common Unix-like system commands used in real development and DevOps workflows.

linux-unix-bash-shell-cli

Linux / Unix / Bash / Shell / CLI

Cybersecurity for Full-Stack developers, focused on interview preparation. Covers secure authentication and authorization, common web vulnerabilities, API and session security, frontend and backend attack vectors, data protection, and practical security decisions in modern full-stack applications.

cybersecurity

Cybersecurity for Full-Stack Developers (Node.js/React Stack)

Database optimization interview questions focused on query performance, indexing, execution plans, joins, pagination, transactions, and practical strategies for improving database efficiency in real-world systems.

dboptimization

Database optimization

MongoDB Performance Tuning category focused on improving query speed, indexing efficiency, schema design, aggregation performance, and scaling strategies for real-world MongoDB applications.

mongodbtunning

MongoDB Performance Tuning

Embedded Development covers the design and programming of software that runs directly on hardware devices. This category includes microcontrollers, real-time systems, sensors, communication protocols, memory management, hardware interfaces, debugging, and performance optimization for resource-constrained environments.

embedded

Embedded development

Electronics Basics covers foundational electronics knowledge for embedded engineers, including circuit fundamentals, basic components, schematic reading, practical signal handling, and power and protection concepts.

electronics-basics

Electronics Basics

Master C and C++ for embedded systems, including memory management, pointers, bitwise operations, hardware register access, interrupt-safe code, real-time constraints, and efficient interaction with microcontrollers and peripherals.

c_plus_embedded

C/C++ for Embedded

Assesses practical knowledge of Docker fundamentals, including images, containers, Dockerfiles, volumes, networking, registries, Docker Compose, security, troubleshooting, and container lifecycle management. Covers the ability to containerize applications, configure reproducible environments, optimize builds, manage persistent data and service communication, diagnose common runtime issues, and apply reliable containerization practices in development and production.

docker

Docker

NodeJS express test contains 20 questions to check your knowledge quickly

What is Node.js?

Event Loop

Using Streams

Exit and Exit Codes

Local Installation

http module

Catching Uncaught Exceptions

process.nextTick

Semantic Versioning

package.json

setImmediate

Buffer

Running Scripts

Thread Pool

Memory Management

Worker threads

fs module

Refactoring

setTimeout

SQL Native Drivers

Document Native Drivers

Handling Async Errors

path module

Glob

Express.js

NestJS

CommonJS

Event Emitter

Call Stack and Stack Trace

JavaScript Errors

Built-in HTTP module

TypeORM

Mongoose

crypto

dotenv

Request and Response Lifecycle

Streaming Responses

process

Why use Node.js?

History of Node.js

Node.js vs Browser

Running Node.js Code

Creating Custom Modules

global keyword

Global Installation

Using Installed Packages

Updating Packages

Creating and Publishing Packages

System Errors

User Specified Errors

Assertion Errors

Debugging Node.js

Promises

Callbacks

setInterval

process.argv

Commander.js

STDIN

Prompts

Inquirer

STDOUT / STDERR

chalk

figlet

cli-progress

Axios

Unfetch

Fastify

Passport.js

jsonwebtoken

nodemon

Sequelize

Prisma ORM

Prisma (MongoDB)

Marko

Jest

Mocha

Cypress

Morgan

Winston

forever

nohup

Cluster

Child Process

path

events

console

assert

perf_hooks

cluster module

Streams Module

Other Built-in Modules

NodeJS express test

NodeJS (1)

NodeJS express test