Open Financial Technologies Private Limited android Software Engineer Interview Questions and Answers

Medium level leet code questions

Q1. Low Leven system design of Instagram.
Ans. 
Low level system design of Instagram involves designing the core components like database, storage, caching, and networking.
• Use sharding to distribute data across multiple database servers for scalability.

• Implement a caching layer using Redis or Memcached to improve performance.

• Utilize a content delivery network (CDN) for faster content delivery to users.

• Design a fault-tolerant storage system to ensure data durability ...read more
Answered by AI
Add your answer

Q1. Creating a high level design of a message queue system
Ans. 
Designing a message queue system for efficient communication between components
• Define the requirements and constraints of the system

• Choose a suitable messaging protocol (e.g. AMQP, MQTT)

• Design the message format and structure

• Implement mechanisms for message persistence and delivery guarantees

• Consider scalability and fault tolerance

• Use appropriate data structures and algorithms for efficient message handling
Answered by AI
Add your answer

Q1. What are your goals ?
Ans. 
My goal is to continuously improve my technical skills, contribute to impactful projects, and eventually move into a leadership role.
• Continuously improve technical skills through learning new technologies and best practices

• Contribute to impactful projects by delivering high-quality code and solutions

• Work towards moving into a leadership role by taking on more responsibilities and mentoring junior team members
Answered by AI
Add your answer
Q2. Why you choose jupiter
Ans. 
I chose Jupiter because of its strong gravitational pull and potential for scientific exploration.
• Jupiter's large size and mass make it a key player in shaping the solar system

• Its strong magnetic field and radiation belts provide valuable insights for space research

• Jupiter's moons, like Europa and Io, offer unique environments for potential exploration missions
Answered by AI
Add your answer

Q1. Design Rating Review System
Ans. 
Design a system to rate and review products or services.
• Allow users to rate products on a scale of 1-5 stars.

• Include written reviews for users to provide more detailed feedback.

• Implement a system to filter and display reviews based on relevance or helpfulness.

• Consider incorporating user profiles and past review history to personalize recommendations.
Answered by AI
Add your answer
Q2. General Engineering questions, system design concepts
Add your answer

Q1. Design a in-memory cache
Ans. 
Design a high-performance in-memory cache system for storing and retrieving data efficiently.
• Use a hash table or a key-value store to store data in memory

• Implement caching strategies like LRU (Least Recently Used) or LFU (Least Frequently Used) to manage cache eviction

• Consider using a distributed cache for scalability and fault tolerance

• Optimize cache size and expiration policies based on the application's data access
Answered by AI
Add your answer

I was asked to perform the low-level design of a microservice.

Asked to do coding for RDBMS using any programing language

Q1. Machine coding: Design in-memory document search
Add your answer

Q1. HLD: Design a ad-click aggregation service
Ans. 
Design an ad-click aggregation service for tracking and analyzing ad clicks.
• Use a distributed system to handle high volume of ad click data

• Implement real-time processing for immediate insights on ad performance

• Utilize a database to store aggregated ad click data for reporting and analysis
Answered by AI
Add your answer

Q1. Rating Service Low level design
Add your answer