ZET SDE Interview Questions and Answers

The test consisted of questions ranging from easy to medium on Leetcode. It was a 90 min round and can be efficiently completed well within 60 min

The was a design problem slightly skewed on the DSA side related to N-arry lockable tree, something similar to the Tree of Space problem on GFG.

This round was a build-up on the previous one with the task of adding concurrency to the operations defined in last problem

Q1. The interview round lasted a little over 60 min, comprised of a DSA medium question and a low-level design question, and was followed up with a series of leading core questions based on OS and COA.
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Q2. The problem was getting on the stack in constant time; the optimization was the trick
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Hard que multiple que scattered economics shares average etc

Easy case study question breakeven etc

Moderate case study related to finance sector

Hard case study deep analysis required

Q1. Behaviour question round by HR easy to moderate
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The first round was a coding test, which was outsourced to an external vendor. I was asked 2 basic DSA questions, and there was discussions around the time and space complexity, and scope of optimizing the solutions. Post that there were a few questions around Spring Boot features and basic system design. The interviewer was professional throughout the interview, and the interview process felt more like a discussion, as compared to the standard interview process.

There was another round of coding - this time conducted by the organization itself. It consisted of a medium level DSA question on stacks. I wrote the code on my personal IDE and executed it there itself. The interviewer discussed about the possible edge cases and how I would deal with them. Post solving the question I was asked about my previous projects.

Q1. Discuss in detail about a scenario where a challenging production issue was handled.
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Q2. What are your responsibilities as a senior / team lead in the current organization?
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Q3. How did you handle conflicts with junior engineers and reporting managers?
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This was the final round where the discussion was largely around system design and HLD. It started off with questions are system design patterns and concepts. Then I was asked to design a booking design, with discussions around concurrency control and transaction management.

Q1. DP on Stock buy n sell
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Implement a dynamic programming solution for stock buy and sell problem.
• Use dynamic programming to find the maximum profit by buying and selling stocks.

• Keep track of the minimum stock price seen so far and update the maximum profit accordingly.

• Consider edge cases like no profit or negative profit.

• Example: Input [7, 1, 5, 3, 6, 4], Output 5 (buy at 1, sell at 6)
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Q1. Dynamo db working style
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DynamoDB is a fully managed NoSQL database service provided by AWS, designed for high performance and scalability.
• DynamoDB is schema-less, allowing for flexible data models

• It offers high availability and durability through replication and automatic backups

• DynamoDB uses primary keys for data retrieval, with optional secondary indexes for querying

• It supports ACID transactions for consistency and reliability

• DynamoDB is de...read more
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Q2. Function vs method
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A function is a standalone block of code that can be called independently, while a method is a function that is associated with a class or object.
• Functions are standalone blocks of code, while methods are functions associated with classes or objects.

• Functions can be called independently, while methods are called on specific instances of classes or objects.

• Functions are defined outside of classes, while methods are defi...read more
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Q1. Tell me something which is not there on your resume ?
Ans. 
I am fluent in three languages - English, Spanish, and French.
• Fluent in English, Spanish, and French

• Have lived in three different countries to learn the languages

• Able to communicate effectively with diverse groups of people
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Q2. When I was presenting my answer while my interaction with Co founder Name: Manas G and based on previous my company he was verbally using slangs like thats " THAT'S A Chu***a company" while he was taking ...read more
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Q3. Nothing use less question even they dont know what to ask?
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Q4. There is no structural interview approach
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Q1. NORMAL QUESTION
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Q2. TELLUS ABOUT YOU
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Q1. What is private key and public key
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Private key and public key are cryptographic keys used in asymmetric encryption to secure communication and data.
• Private key is kept secret and used for decryption and signing

• Public key is shared and used for encryption and verification

• Example: SSL/TLS certificates use public and private keys for secure communication
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Q2. How you wioll distribute the traffic to different servers.
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Traffic can be distributed using load balancers, DNS round robin, or server-side load balancing algorithms.
• Use a load balancer to evenly distribute traffic among servers based on various algorithms like round robin, least connections, or IP hash.

• Implement DNS round robin to distribute traffic by rotating the IP addresses returned for a domain name query.

• Utilize server-side load balancing algorithms like weighted round ...read more
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