Yellow.ai India Software Developer Interview: Rounds, Questions and Preparation

What the job involves

A Software Developer at an Indian IT services company like Yellow.ai India typically works on building and maintaining conversational AI platforms, backend services, or web applications for clients. Day to day, you may write code, fix bugs, integrate APIs, participate in stand-ups, and collaborate with senior developers to deliver features on time. Freshers often start with structured training and then move to project teams where they learn domain-specific tools and frameworks.

Role and Technical Knowledge

1. 1

   What is the difference between a process and a thread, and why does it matter for a software developer?

   Explain that a process has its own memory space while threads share memory, and mention how this affects performance and concurrency in applications.

2. 2

   How would you design a simple REST API for a chatbot to fetch user details?

   Cover endpoint naming, HTTP methods like GET, status codes, request/response format in JSON, and basic authentication.

3. 3

   Explain normalization in DBMS with an example relevant to storing chat conversations.

   Describe 1NF, 2NF, 3NF briefly and show how splitting tables for users, sessions, and messages reduces redundancy.

4. 4

   What is the time complexity of binary search and when would you use it over linear search?

   State O(log n) and explain that it requires a sorted array, making it efficient for large datasets but not for unsorted or frequently changing data.

Practical Scenarios and Coding

1. 5

   You are given an array of integers. Write a function to find the first non-repeating element. How would you test it?

   Use a hash map to count frequencies, then iterate to find the first with count 1. Mention edge cases like empty array, all duplicates, and negative numbers.

2. 6

   A client reports that their chatbot is responding slowly during peak hours. How would you debug this?

   Suggest checking logs, database query performance, API response times, and server load. Mention profiling and caching as possible fixes.

3. 7

   How would you handle a situation where you need to integrate a third-party payment gateway into an existing application?

   Talk about reading API docs, using sandbox environments, handling errors and retries, and securing API keys.

4. 8

   Write a SQL query to find the top 3 most active users based on number of messages sent in the last week.

   Use GROUP BY, COUNT, WHERE with date filter, ORDER BY DESC, and LIMIT 3. Mention indexing on date and user_id for performance.

Behavioural and Teamwork

1. 9

   Tell me about a time you worked in a team to complete a college project. What was your role?

   Use STAR method: describe the situation, task, your action, and result. Highlight collaboration, communication, and any conflict resolution.

2. 10

   Describe a situation where you had to learn a new technology quickly for a project. How did you approach it?

   Show initiative, mention specific resources like documentation or online courses, and explain how you applied the learning under a deadline.

3. 11

   How do you handle feedback or criticism on your code?

   Emphasize a positive attitude, willingness to improve, and giving an example of incorporating review comments to write better code.

4. 12

   Have you ever missed a deadline? What did you do?

   Be honest, focus on lessons learned, and show that you communicate early and adjust priorities to avoid repeat mistakes.

HR and Company Fit

1. 13

   Why do you want to join a company like Yellow.ai India as a software developer?

   Research the company's work in conversational AI and mention your interest in building scalable, user-facing products. Avoid generic answers.

2. 14

   Are you willing to relocate or work in different shifts if required?

   Be clear about your flexibility. Indian IT services often require relocation or shift work, so a straightforward yes or a reasoned condition is fine.

3. 15

   Where do you see yourself in the next three years?

   Show ambition to grow technically, take ownership of modules, and contribute to team success without sounding like you will leave soon.

4. 16

   What are your salary expectations for this role?

   For a fresher, research typical entry-level salaries in Indian IT services and give a range or say you are open to company standards.