Ninjacart Software Development Engineer Interview Questions and Answers

Apti and coding

Q1. Questions on java a d sql
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Q1. Hard Stock sell problem
Ans. 
The hard stock sell problem involves determining the best time to sell stocks to maximize profit.
• Consider using dynamic programming to solve this problem efficiently.

• Keep track of the minimum stock price seen so far and calculate the maximum profit that can be made by selling at each day.

• The final answer will be the maximum profit that can be made by selling at the last day.
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Q2. Create a server without express
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Creating a server without using Express framework
• Use Node.js built-in 'http' module to create a server

• Listen for incoming requests on a specific port

• Handle different routes and methods using 'http' module
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Q3. What is singleton class, write a usecase through code
Ans. 
Singleton class is a class that can only have one instance created throughout the application.
• Singleton class restricts the instantiation of a class to one object.

• It is often used for logging, caching, thread pools, database connections, etc.

• Example: Java implementation of Singleton class -

• public class Singleton { private static Singleton instance; private Singleton() {} public static Singleton getInstance() { if(insta...read more
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Q1. Create pagination component using an api show the data for the pages
Ans. 
Create a pagination component using an API to display data for different pages.
• Use API to fetch data for each page

• Implement pagination logic to display data for each page

• Allow users to navigate between pages
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Coding test has multiple choice questions based on basics of programming and 2 coding questions.

Q1. What are the details of Object-Oriented Programming (OOP) concepts?
Ans. 
OOP is a programming paradigm based on the concept of objects, which can contain data and code to manipulate that data.
• OOP focuses on creating objects that interact with each other to solve problems.

• Key concepts include classes, objects, inheritance, polymorphism, and encapsulation.

• Classes are blueprints for creating objects, defining their properties and behaviors.

• Inheritance allows new classes to be based on existing...read more
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Q2. DSA question to solve using any programming language ?
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Q3. Some concepts of web development and binary tree related questions
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Q1. What do you know about Digit insurance?
Ans. 
Digit Insurance is a technology-driven insurance company offering a range of general insurance products.
• Digit Insurance was founded in 2016 by Kamesh Goyal.

• It is known for its innovative and customer-centric approach to insurance.

• Digit offers various insurance products such as health insurance, motor insurance, travel insurance, and more.

• The company leverages technology to simplify the insurance process and provide a s
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Q2. Where do you see yourself after 5 years ?
Ans. 
In 5 years, I see myself as a senior software engineer leading a team of developers on innovative projects.
• Leading a team of developers on projects

• Continuing to learn and grow in my technical skills

• Contributing to the success and growth of the company

• Possibly pursuing further education or certifications

• Exploring opportunities for mentorship and leadership roles
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First round was coding test in online mode which was quite easy.

Q1. In the 2nd round they asked the technical questions from SQL , simple coding questions.
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Basic maths, logical resoning, puzzles

Competitive Programming on Dynamic Programming, Java code debug, SQL qurries