IT Catalyst Software Software Engineer Interview Questions and Answers

Q1. What is the difference between normal and arrow functions
Ans. 
Arrow functions are more concise and have a lexical 'this' binding compared to normal functions.
• Arrow functions do not have their own 'this' keyword, they inherit it from the parent scope.

• Arrow functions do not have their own 'arguments' object.

• Arrow functions cannot be used as constructors with 'new'.

• Arrow functions are more concise and have implicit return when no curly braces are used.
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Q2. All basic JS Questions to cover Hoisting closure
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Q3. They asked to show me an example using the API call
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Q4. Difference between forEach and Map
Ans. 
forEach is used to iterate over an array and perform a function on each element, while map creates a new array by applying a function to each element.
• forEach does not return a new array, while map does

• forEach does not modify the original array, while map creates a new array

• forEach is used for side effects, while map is used for transformation

• Example: forEach - array.forEach(item => console.log(item)), map - const newAr
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Q1. Explain your work in current project
Ans. 
I am currently working on developing a web application for a client in the e-commerce industry.
• Developing front-end using React.js

• Implementing back-end functionalities using Node.js and Express

• Integrating payment gateway for online transactions

• Optimizing performance and user experience
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Q1. Explain the design of the current project
Ans. 
The current project is a web application for managing inventory and sales.
• The project uses a client-server architecture with a front-end built using React and a back-end built using Node.js and MongoDB.

• The front-end communicates with the back-end through RESTful APIs.

• The project includes features such as user authentication, product management, sales tracking, and reporting.

• The design follows a modular approach with se...read more
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Aptitude was very basic.

Q1. What is constant?
Ans. 
A constant is a value that does not change during the execution of a program.
• Constants are used to store values that remain the same throughout the program.

• They are declared using the 'const' keyword in many programming languages.

• Examples include mathematical constants like pi (3.14159) or physical constants like the speed of light (299,792,458 m/s).
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Q2. What is object oriented programming?
Ans. 
Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.
• Objects are instances of classes, which define the structure and behavior of the objects.

• Encapsulation, inheritance, and polymorphism are key principles of object oriented programming.

• Example: Inheritance allows a subclass to inherit attributes and methods from a superclass.
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Q1. Salary Negotiation
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Q2. Work culture description
Ans. 
Our work culture is collaborative, innovative, and focused on continuous learning and growth.
• Encourages teamwork and open communication

• Emphasizes creativity and problem-solving

• Provides opportunities for professional development

• Values diversity and inclusion

• Promotes a healthy work-life balance
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Q1. Spring related questions
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Q2. Java related questions
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Q3. Couple of coding questions (Easy)
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Write code to return the maximum profit by buying and selling stocks using available money

Q1. What is Webpack
Ans. 
Webpack is a module bundler for JavaScript applications.
• Webpack takes modules with dependencies and generates static assets representing those modules.

• It can handle various types of assets such as JavaScript, CSS, and images.

• Webpack allows for code splitting, lazy loading, and hot module replacement.

• It is commonly used in modern web development workflows to optimize and bundle code for production.
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MCQs on DN and SQL etc.

2 coding questions, 7 debugging questions.

Q1. Python core question
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Q2. DSA question on BFS
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Q1. Design discussion
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Q2. Resume question
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Basic program with stream

Q1. Microservice architecture
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Q2. Crud operations
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