Housing.com Senior Software Engineer Interview Questions and Answers

Q1. The interview was outsourced to Interview Vector.
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Q2. One medium DSA question and an LLD question.
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Mettle Test based on DP based approach

Q1. Based on Tree, Graph, Segment Tree
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Q1. DS algo based on DP, Trees, Graphs
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Q1. Systed Design Round 1
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Q2. Design a Distributed Queue to have functionality similar to Kafka.
Ans. 
Design a distributed queue similar to Kafka.
• Use a distributed architecture with multiple brokers and partitions.

• Implement a publish-subscribe model for producers and consumers.

• Ensure fault tolerance and high availability through replication and leader election.

• Use a log-based storage system for messages and offsets.

• Provide support for message ordering and retention policies.

• Implement a scalable and efficient message de...read more
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Q3. Design Price Tagger System
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Design a Price Tagger System
• Identify the products to be tagged with prices

• Determine the pricing strategy (e.g. cost-plus, value-based, etc.)

• Choose the appropriate tagging technology (e.g. barcode, RFID, etc.)

• Develop a user-friendly interface for tagging and updating prices

• Implement a database to store product and pricing information

• Integrate with point-of-sale systems for accurate pricing at checkout
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Basic coding test from hackerearth.

Q1. Design Search Systems
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Designing search systems involves creating efficient algorithms and data structures to quickly retrieve relevant information.
• Understand the data structure of the search system (e.g. inverted index, trie)

• Implement efficient search algorithms (e.g. binary search, hash tables)

• Consider scalability and performance optimization techniques (e.g. caching, indexing)

• Include user-friendly features like autocomplete and spell corr...read more
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Q1. Levels of generation
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Levels of generation refer to the stages of software development, from requirements to deployment.
• 1st Generation: Machine code, directly executed by the CPU (e.g., binary code).

• 2nd Generation: Assembly language, using mnemonics (e.g., MOV, ADD).

• 3rd Generation: High-level languages (e.g., C, Java) that are more abstract and easier to read.

• 4th Generation: Languages focused on database querying and report generation (e.g....read more
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Q2. Design PlayO. Talked about concurrency and availability.
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It was a coding round, online assessment. Medium level DSA questions

Q1. The discussion was based on system design, was asked to design parking lot system
Ans. 
Design a parking lot system to manage parking spaces, vehicles, and payment processing efficiently.
• Define the main components: ParkingLot, ParkingSpace, Vehicle, and Payment.

• Implement a class for ParkingLot that manages multiple ParkingSpaces.

• Use a Vehicle class to represent different types of vehicles (e.g., Car, Motorcycle).

• Include methods for parking a vehicle, retrieving a vehicle, and checking availability.

• Conside...read more
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Q1. Hiring manager round, he asked about the problems that I solved
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I was asked question on sliding window on finding the largest subarray with all distinct numbers. The interviewer was very helpful.