Neustar Associate Software Developer Interview Questions and Answers

Q1. Reverse the given array
Ans. 
Reverse the given array of strings
• Use a loop to iterate through the array

• Swap the first and last elements, then the second and second-to-last elements, and so on

• Stop swapping when the loop reaches the middle of the array
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Leetcode easy level questions

Q1. Eliminate subsequent repetitions in a string
Ans. 
Remove subsequent repetitions in a string
• Iterate through the string and compare each character with the next one

• If they are the same, remove the repetition by shifting the characters to the left

• Repeat this process until all repetitions are eliminated
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Q1. Behavioral questions asked by Delivery Manager
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Q1. Behavioral round and past experience
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Q1. Design a URL shortener
Ans. 
A URL shortener is a tool that takes a long URL and generates a shorter, more manageable link.
• Generate a unique short code for each long URL

• Store the mapping between short code and long URL in a database

• Redirect users from short URL to original long URL when accessed
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Q2. Write unit test for a sevice class
Ans. 
Unit test for a service class
• Create a test class for the service class

• Mock any dependencies of the service class

• Write test methods to cover different scenarios

• Use assertions to verify the expected outcomes
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Q1. Explain oops concepts
Ans. 
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOP focuses on creating objects that interact with each other to solve problems.

• Encapsulation: Objects can hide their internal state and require interactions through defined interfaces.

• Inheritance: Objects can inherit attributes and methods from other objects.

• Polymorphism: Objec...read more
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Q2. Write a code on simple one.
Ans. 
Code a simple one
• Use a basic programming language like Python or JavaScript

• Create an array of strings

• Print the array elements
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Q3. Explain about your projects
Ans. 
I have worked on various projects including a web application for tracking inventory and a mobile app for managing tasks.
• Developed a web application using React.js for tracking inventory levels and generating reports

• Created a mobile app using Flutter for managing tasks and setting reminders

• Implemented RESTful APIs for communication between frontend and backend systems
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Q1. Tell me about yourself
Ans. 
I am a software developer with 5 years of experience in Java, Python, and SQL.
• 5 years of experience in Java, Python, and SQL

• Strong problem-solving skills

• Experience working in Agile development environment

• Passionate about learning new technologies
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Q2. Why msg global solutions
Ans. 
I want to work at msg global solutions because of their reputation for innovative solutions and collaborative work environment.
• I am impressed by msg global solutions' track record of delivering cutting-edge software solutions to clients.

• I am excited about the opportunity to work with a team of talented developers and collaborate on challenging projects.

• I value the emphasis msg global solutions places on professional de...read more
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Q1. Basic to medium questions related to DotNet Core MVC, SQL Server, etc
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Q1. Completely unprofessional behavior of the interviewer. - No Introduction Direct start asking questions. - Asking too many misleading questions (First ask what you worked on, then ask did you heard about th...read more
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Q1. About the project. and asked what i did in project. how to create schema in pyspark. what is ADE. what are the difficulties i faced in project. what is spark submit command how we write sparksubmit command...read more
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Q2. No of occurrences of letter in a string.
Ans. 
Count occurrences of a letter in a string.
• Iterate through each character in the string and count occurrences of the specified letter.

• Use a hashmap to store the count of each letter.

• Handle both uppercase and lowercase letters to ensure accurate counting.
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30 mins Aptitude Question

30 mins - 3 Coding Question

Q1. Describe Rest API
Ans. 
Rest API is a set of rules and conventions for building and interacting with web services using HTTP methods.
• Rest API stands for Representational State Transfer Application Programming Interface.

• It uses standard HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations.

• RESTful APIs use URLs to access resources, and return data in JSON or XML format.

• Stateless communication allows for scalability and flexibilit...read more
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Q2. What is various Response code. Diffenrence b/w 200 & 201, 400 & 403
Ans. 
Response codes indicate the status of a HTTP request. 200 & 201 are success codes, while 400 & 403 are client error codes.
• 200 - OK: Request was successful

• 201 - Created: Request was successful and a new resource was created

• 400 - Bad Request: The server cannot process the request due to a client error

• 403 - Forbidden: The server understood the request, but refuses to authorize it
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