Iterable India Software Engineer Interview: Rounds, Questions and Preparation

What the job involves

Software Engineers at fast-growing global tech companies build, test, and maintain scalable software products that serve customers worldwide. Day to day, they write clean code, collaborate with product and design teams, debug production issues, and continuously improve system performance. Freshers typically start with well-defined features and gradually take ownership of larger components.

Role and Technical Knowledge

1. 1

   Explain the difference between SQL and NoSQL databases, and when would you choose one over the other for a customer engagement platform?

   Cover scalability, schema flexibility, and use cases like user profiles (SQL) versus activity logs (NoSQL).

2. 2

   What is a REST API, and how would you design an endpoint for retrieving a user's notification preferences?

   Mention HTTP methods, status codes, resource naming, and JSON response structure.

3. 3

   Describe how you would handle version control in a team project using Git, including branching and merging strategies.

   Talk about feature branches, pull requests, code reviews, and resolving merge conflicts.

4. 4

   What are the key principles of object-oriented programming, and how do they help in building maintainable software?

   Explain encapsulation, inheritance, polymorphism, and abstraction with a simple example.

Practical Scenarios

1. 5

   You are asked to optimize a slow database query that fetches user engagement metrics. What steps would you take?

   Discuss indexing, query analysis, caching, and possibly denormalization for read-heavy workloads.

2. 6

   How would you debug a production issue where users are not receiving email notifications?

   Outline checking logs, reproducing the issue, isolating the failure point, and communicating with the team.

3. 7

   Imagine you need to add a new feature to an existing codebase you are unfamiliar with. How do you approach it?

   Mention reading documentation, writing tests, pair programming, and making small incremental changes.

4. 8

   If you had to design a simple URL shortener service, what components would you include?

   Cover hashing, database choice, API endpoints, and handling high read traffic.

Behavioural and HR

1. 9

   Why do you want to work at a fast-growing global tech company like Iterable India?

   Show interest in scale, learning opportunities, and the company's product domain without claiming specific knowledge.

2. 10

   Tell me about a time you worked in a team to solve a difficult problem. What was your role?

   Use STAR method: describe situation, task, action, and result, highlighting collaboration.

3. 11

   How do you handle feedback or criticism on your code?

   Demonstrate openness, focus on learning, and willingness to improve.

4. 12

   Where do you see yourself in the next two years as a software engineer?

   Align your growth with technical depth, ownership, and contributing to team goals.

Problem Solving and Coding

1. 13

   Given an array of integers, find two numbers that sum to a target value. How would you optimize your solution?

   Start with brute force, then use a hash map for O(n) time complexity.

2. 14

   Write a function to check if a string is a palindrome, considering only alphanumeric characters and ignoring case.

   Use two pointers or reverse the cleaned string, and discuss edge cases.

3. 15

   Explain how you would detect a cycle in a linked list.

   Describe Floyd's tortoise and hare algorithm and its time/space complexity.

4. 16

   How would you find the first non-repeating character in a string?

   Use a hash map to count frequencies, then iterate to find the first with count 1.