Surya Software Systems Software Developer Interview Questions and Answers

Q1. Let var const difference
Ans. 
var, let, and const are all used to declare variables in JavaScript, but they have different scopes and mutability.
• var is function-scoped and can be redeclared and reassigned

• let is block-scoped and can be reassigned but not redeclared

• const is block-scoped and cannot be reassigned or redeclared
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Q2. Polyfills of bind method
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Polyfills of bind method provide a way to use the bind method in older browsers that do not support it natively.
• Polyfill code typically checks if the bind method is available and if not, it creates a new function that mimics the behavior of bind.

• One common polyfill for the bind method is the following: Function.prototype.bind = Function.prototype.bind || function() { // polyfill code here };

• Polyfills are often used to ...read more
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Q1. Make a search bar in React
Ans. 
Create a search bar component in React for filtering data
• Create a functional component for the search bar

• Use state to store the search query

• Implement a onChange event handler to update the search query

• Filter the data based on the search query
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Q2. React js core concepts
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Q1. How you structure your work
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Q2. How you make a project from scratch
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Q1. Introduce yourself
Ans. 
I am a software developer with 5 years of experience in web development using technologies like JavaScript, React, and Node.js.
• 5 years of experience in web development

• Proficient in JavaScript, React, and Node.js

• Strong problem-solving skills
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Discussion on experience and current role and responsibilities

Q1. 1. Discuss one past project
Ans. 
Developed a web-based inventory management system to streamline stock tracking and order processing for a retail client.
• Utilized React for the front-end, ensuring a responsive and user-friendly interface.

• Implemented a RESTful API using Node.js and Express to handle data transactions.

• Integrated a PostgreSQL database for efficient data storage and retrieval.

• Incorporated real-time notifications for low stock levels using ...read more
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Q2. 2. Design a job scheduler
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A job scheduler is a software application that manages the scheduling of tasks or jobs to be executed by a computer system.
• Define the job scheduling requirements such as priority, deadline, resource constraints, etc.

• Implement a scheduling algorithm like First Come First Serve, Shortest Job First, Round Robin, etc.

• Maintain a queue of jobs to be executed and allocate resources accordingly.

• Monitor job execution and handle...read more
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Q1. Promises in javascript
Ans. 
Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.
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Q1. Resume based questions
Ans. 
I have a strong background in software development with experience in various programming languages and project management.
• Bachelor's degree in Computer Science from XYZ University.

• 3 years of experience working as a software developer at ABC Corp, focusing on web applications.

• Proficient in languages such as Java, Python, and JavaScript, with a recent project involving a full-stack application using React and Node.js.

• Ex...read more
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Q2. Event loop in nodejs
Ans. 
Event loop in Node.js manages asynchronous operations by executing callback functions when certain events occur.
• Event loop is responsible for handling I/O operations, timers, and callbacks in Node.js

• It allows Node.js to perform non-blocking operations efficiently

• Event loop continuously checks the event queue for new events to execute
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Q3. Javascript es6 questions
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Critical thinking, Logic, English

Q1. Dependency Injection in .NET
Ans. 
Dependency Injection in .NET is a design pattern where dependencies are injected into a class rather than created within the class.
• Dependency Injection helps in achieving loose coupling between classes.

• It allows for easier testing by enabling mock objects to be injected during testing.

• In .NET, Dependency Injection can be implemented using frameworks like Unity, Ninject, or built-in .NET Core DI container.

• Example: Const...read more
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Q1. Closures in JS. State management in Angular
Ans. 
Closures in JS allow functions to access variables from their outer scope. Angular uses services for state management.
• Closures in JavaScript allow functions to access variables from their outer scope, even after the outer function has finished executing.

• Angular uses services to manage state in applications, allowing for centralized data management and communication between components.

• State management in Angular involve...read more
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