Jio Software Developer Interview Questions, Process, and Tips

Just basic quants and maths was in the test

Q1. Based on projects
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Q1. Behavioral questions were asked and what do you know about the company
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Basic aptitude round and 2 coding questions

Q1. Techincal interview questions on basic DSA and os DBMS and major grilling on projects
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Q1. Basic questions like tell me about your self and willing to relocate etc
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Q1. All basics which language you know?
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Q2. Ready to learn and work ?
Ans. 
Yes, I am ready to learn and work.
• I am highly motivated and eager to expand my knowledge and skills.

• I am open to learning new technologies and programming languages.

• I am willing to take on challenging projects and work collaboratively with a team.

• I have a track record of quickly adapting to new environments and delivering high-quality software solutions.
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Q3. Able to handle work pressure?
Ans. 
Yes, I am able to handle work pressure.
• I prioritize tasks and manage my time effectively

• I communicate with my team and ask for help when needed

• I take breaks and practice stress-relieving techniques

• I stay organized and focused on the end goal
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Q1. Which tech stack you worked ?
Ans. 
I have worked with a variety of tech stacks including MEAN, MERN, LAMP, and Java Spring.
• MEAN stack (MongoDB, Express.js, Angular, Node.js)

• MERN stack (MongoDB, Express.js, React, Node.js)

• LAMP stack (Linux, Apache, MySQL, PHP)

• Java Spring stack (Java, Spring Framework)
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Q2. Crucial work which you done in your career?
Ans. 
Developed a critical software module for a large e-commerce platform.
• Designed and implemented a secure payment gateway integration.

• Optimized database queries to improve performance by 50%.

• Resolved a major bug that was causing system crashes.

• Implemented a real-time chat feature using WebSockets.

• Developed an automated testing framework to ensure code quality.
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Q3. How to manage your work ?
Ans. 
Managing work involves setting goals, prioritizing tasks, and using effective time management techniques.
• Set clear goals and objectives for each project or task

• Break down complex tasks into smaller, manageable subtasks

• Prioritize tasks based on urgency and importance

• Create a schedule or to-do list to organize and track progress

• Use tools and technologies to streamline work processes

• Communicate and collaborate with team m...read more
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Best way to prefer java, core java and most imp spring boot because many of companies required spring boot now a days

Q1. What is java is the basic question for everyone
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Q2. What is difference between path and classpath variables
Ans. 
Path variable is used to locate executable files while classpath variable is used to locate Java classes.
• Path variable is used by the operating system to locate executable files.

• Classpath variable is used by Java to locate classes and resources.

• Path variable is system-specific while classpath variable is Java-specific.

• Path variable is set by the user while classpath variable is set by the developer.

• Example of path vari...read more
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Q3. What is enum in java
Ans. 
Enum is a special data type in Java used to define a set of constants.
• Enums are used to represent a fixed number of values that do not change.

• They are declared using the enum keyword.

• Each enum constant is an object of the enum type.

• Enums can have constructors, methods, and fields.

• Example: enum Color { RED, GREEN, BLUE }

• Enums can also have values associated with them, like Color.RED(255, 0, 0).
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Q4. What is 2 phase commit
Ans. 
2 phase commit is a protocol used to ensure distributed transactions are either committed or rolled back.
• Used in distributed systems where multiple databases are involved in a transaction

• Ensures all databases either commit or rollback the transaction

• Involves a coordinator and multiple participants

• Coordinator sends a prepare message to participants, who respond with either commit or abort

• If all participants respond with...read more
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Q5. They can ask questions on your project
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Q6. Is java completely object oriented?
Ans. 
Yes, Java is completely object oriented.
• Java is designed to be completely object oriented.

• All code in Java is written inside classes and objects.

• Java supports encapsulation, inheritance, and polymorphism.

• Java does have some non-object oriented features like primitive data types.

• However, even these can be treated as objects using wrapper classes.
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Q7. What is exception in java?
Ans. 
Exception is an event that occurs during the execution of a program and disrupts the normal flow of instructions.
• Exceptions are objects that are thrown at runtime when an abnormal condition occurs

• Java provides a set of predefined exceptions that can be used to handle errors

• Exceptions can be caught and handled using try-catch blocks

• Unchecked exceptions are those that are not checked at compile-time, while checked except
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Q1. No specific questions they can ask about company only and will talk about package
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Round duration - 90 Minutes
Round difficulty - Medium

It was in the evening. Coding platform was good. There were 3 coding questions only in the screening round

Q1. 
Triple Sum Problem Statement
Bojack wants to gift Todd a binary tree with N nodes for his birthday. However, the tree is too large, so he decides to select exactly three nodes such that their sum equals a...read more
Ans. 
The task is to determine if it is possible to select three nodes from a binary tree such that their sum equals a given value.
• Traverse the binary tree and store all the node values in an array

• Use three nested loops to iterate through all possible combinations of three nodes

• Check if the sum of the three nodes equals the given value

• If a valid combination is found, return True

• If no valid combination is found, return False
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Q2. 
Inorder Traversal of Binary Tree
You are provided with a binary tree consisting of 'N' nodes, where each node carries an integer value. Your task is to determine the in-order traversal of the given binary...read more
Ans. 
The task is to find the in-order traversal of a given binary tree.
• Implement a recursive function to perform in-order traversal of the binary tree

• Start from the left subtree, then visit the root, and finally visit the right subtree

• Use an array to store the values of the nodes in the in-order traversal
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Round duration - 45 minutes
Round difficulty - Medium

It was conducted in day time. Interviewer shared the jio's platform link where question was there and a function was there which I needed to complete while sharing my screen. Interviewer was very nice in behaviour

Q1. 
Problem Statement: Check Whether Binary Tree Is Complete
You are provided with a binary tree. Your task is to determine if the given binary tree is a Complete Binary Tree.
A Complete Binary Tree is defin...read more
Ans. 
The task is to check whether a given binary tree is a complete binary tree or not.
• A complete binary tree is a binary tree where every level, except possibly the last, is completely filled.

• All nodes in the last level are placed at the left end.

• To check if a binary tree is complete, we can perform a level order traversal and check if any null nodes appear before all non-null nodes in the last level.

• If any null nodes appe...read more
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Round duration - 45 minutes
Round difficulty - Medium

It was conducted in early evening, again it consist of one coding question and some Basic OOP question.

Q1. 
Rat in a Maze Problem Statement
You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...read more
Ans. 
The task is to find all possible paths for a rat to reach its destination in a maze.
• The maze is represented as a square matrix of 0s and 1s.

• The rat starts at (0, 0) and the destination is at (N-1, N-1).

• The rat can move in four directions: up, down, left, and right.

• Use backtracking to explore all possible paths.

• Print the paths in alphabetical order.
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Round duration - 45 minutes
Round difficulty - Easy

It was conducted at night like it was 8.00pm . HR was very nice. She asked managerial questions only and asked about my hobbies, experiences, why I want to join jio etc.

Q1. Why do you want to join Jio?
Ans. 
I want to join Jio because of its innovative technology and vast opportunities for growth.
• Jio is known for its cutting-edge technology and I want to be a part of that innovation.

• Jio offers a wide range of career opportunities and growth prospects.

• Jio's strong market presence and success make it an exciting company to work for.

• Jio's focus on digital transformation aligns with my passion for technology.

• Jio's commitment t...read more
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Q2. What will you do if there is a conflict in a team you are working with?
Ans. 
In case of conflict in a team, I would first try to understand the root cause and then facilitate open communication and collaboration to resolve the conflict.
• Listen to all parties involved and understand their perspectives

• Encourage open and respectful communication

• Facilitate a discussion to identify the root cause of the conflict

• Promote collaboration and finding common ground

• Propose potential solutions and encourage c...read more
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Round duration - 70 minutes
Round difficulty - Medium

Link was active for 24 hours, I took the test at night.
Difficulty was medium.
There were some MCQs on Springboot/Java along with 2 DSA questions.

Q1. 
Zigzag Binary Tree Traversal Problem
Given a binary tree, compute the zigzag level order traversal of the node values in the tree. The zigzag traversal requires traversing levels from left to right, then ...read more
Ans. 
Zigzag level order traversal of a binary tree is computed by alternating between left to right and right to left traversal at each level.
• Use a queue to perform level order traversal of the binary tree.

• Maintain a flag to switch between left to right and right to left traversal at each level.

• Store the node values in a list while traversing and alternate the order based on the flag.

• Example: For input 1 2 3 4 -1 5 6 -1 7 -...read more
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Q2. 
K Closest Points to Origin Problem Statement
Your house is located at the origin (0,0) of a 2-D plane. There are N neighbors living at different points on the plane. Your goal is to visit exactly K neighb...read more
Ans. 
Find the K closest points to the origin in a 2-D plane using Euclidean Distance.
• Calculate the Euclidean Distance of each point from the origin

• Sort the points based on their distances from the origin

• Return the first K points as the closest neighbors
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Round duration - 60 minutes
Round difficulty - Medium

Technical round (Questions on Java, Spring Boot, Microservices, Rest APIs, OOPs and Solid principals).

Round duration - 45 minutes
Round difficulty - Easy