Bit Canny Technologies Senior Software Engineer Interview Questions and Answers

DSA based round. Taken by external company. I would say to medium level questions asked.

Q1. This was based on LLD.
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Q2. Why SQL and not NoSQL?
Ans. 
SQL is preferred for structured data, transactions, complex queries, and ACID compliance.
• SQL is better for structured data and relationships between data.

• SQL is preferred for transactions and ensuring data integrity.

• SQL is more suitable for complex queries involving multiple tables.

• SQL databases provide ACID compliance for data consistency and reliability.
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Q1. Past project experience with a Tech Lead.
Ans. 
Worked on a project with a Tech Lead to develop a new feature for a web application.
• Collaborated closely with the Tech Lead to define project requirements and timelines

• Received guidance and mentorship from the Tech Lead on best practices and coding standards

• Participated in regular code reviews and discussions with the Tech Lead to ensure quality and consistency

• Implemented feedback and suggestions provided by the Tech L
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Q2. More into the problems I have solved previously and the working culture discussion.
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Q1. Design a paginated list of items, then improve efficiency
Ans. 
Design a paginated list of items and improve efficiency
• Implement lazy loading to fetch data only when needed

• Use caching to store previously fetched data for faster retrieval

• Optimize database queries to reduce load times
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Q1. Basics on Javascript, ReactJS
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It was easy basic questions were there and we were asked to write two emails.

Q1. Questions related to projects
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Q2. QBasic SQL questions
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Q1. Resume based questions
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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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3 DSA questions on array and strings 1 easy, 2 medium level

Create django backend project for book store

Q1. Behaviour and Situations questions
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Q1. C# , oops & mvc. Be clear with basic concepts
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Q2. What is the four pillars of oops
Ans. 
The four pillars of OOP are Abstraction, Encapsulation, Inheritance, and Polymorphism.
• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and functions that manipulate it together.

• Inheritance: Creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: Ability of objects to take on multiple forms or behaviors.
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Q3. What is mvc and how it helps the developers
Ans. 
MVC stands for Model-View-Controller. It is a software design pattern that separates an application into three interconnected components.
• Model represents the data and business logic of the application

• View is responsible for rendering the user interface

• Controller handles user input and updates the model and view accordingly

• MVC helps developers to write clean, modular and maintainable code

• It also enables parallel develop...read more
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