Rakuten Interview Questions, Process, and Tips

Easy String recursion questions, java questions

Q1. Java exception handling assignment
Ans. Fixed the codebase by handling different exceptions
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Q1. Implement stack that can do push, pop, getmin in O(1)
Ans. 
Implement a stack with push, pop, and getmin operations in O(1) time complexity.
• Use two stacks - one for storing the elements and the other for storing the minimum values

• When pushing an element, check if it is smaller than the current minimum and push it to the minimum stack if it is

• When popping an element, check if it is the current minimum and pop it from the minimum stack if it is

• To get the minimum element, simply r
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Q1. Architecture design for large scale app
Ans. 
Architecture design for large scale app involves distributed systems, microservices, and scalability.
• Use distributed systems to handle large amounts of data and traffic

• Implement microservices to break down the app into smaller, manageable components

• Ensure scalability by designing for horizontal scaling and load balancing

• Use caching and database sharding to improve performance

• Implement fault tolerance and disaster recov...read more
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Q2. Multithreading and multiprocessing use cases
Ans. 
Multithreading and multiprocessing are used to improve performance by executing multiple tasks simultaneously.
• Multithreading is useful for I/O-bound tasks, such as web scraping or file processing.

• Multiprocessing is useful for CPU-bound tasks, such as image processing or scientific computing.

• Both can be used together to achieve maximum performance.

• Care must be taken to avoid race conditions and deadlocks.

• Python's Global...read more
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Q3. Hash Table implementation
Ans. 
Hash table is a data structure that maps keys to values using a hash function.
• Hash function maps keys to indices in an array

• Collisions can occur when two keys map to the same index

• Collision resolution techniques include chaining and open addressing

• Hash tables have O(1) average case time complexity for insert, delete, and search operations
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Q4. Memory management in python
Ans. 
Python uses automatic memory management through garbage collection.
• Python uses reference counting to keep track of objects in memory.

• When an object's reference count reaches zero, it is deleted by the garbage collector.

• Python also uses a cyclic garbage collector to handle circular references.

• Memory can be managed manually using the 'gc' module.

• Python's memory management is efficient and transparent to the programmer.
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Prior to the Interview I got the Assignment and Basis on the Assignment Got the Interview Invitation.

Q1. Interviewer starts with Introduce about yourself without even introduce himself & Off the Camera & I cannot seen even interviewer name because his Family name is only visible with First Name First Initial....read more
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Q2. He Asked me about only one question related to Stake Holder that's it, He even not capable to take the interview i do not why.
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Q1. System Design for use cases
Ans. 
System design for use cases involves identifying requirements, designing components, and ensuring scalability and reliability.
• Identify use cases and requirements

• Design components to meet use case requirements

• Ensure scalability and reliability of the system

• Consider factors like performance, security, and maintainability

• Use tools like UML diagrams, flowcharts, and architecture diagrams
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Q2. Architecture for real scenarios
Ans. 
Architecture for real scenarios involves designing systems that can handle real-world use cases and challenges.
• Consider scalability to handle increasing user load

• Ensure reliability and fault tolerance to prevent system failures

• Design for security to protect sensitive data

• Optimize performance for efficient operation

• Implement monitoring and logging for troubleshooting

• Use microservices architecture for flexibility and mod
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Q1. Elaboration of system design
Ans. 
System design involves creating a high-level architecture for a software system to meet specific requirements.
• Identify the requirements and constraints of the system

• Break down the system into components and modules

• Define the interactions between components

• Consider scalability, reliability, and performance

• Choose appropriate technologies and tools

• Create a detailed design document
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Q2. Elaboration of arch choices
Ans. 
Architectural choices refer to the decisions made regarding the structure and design of a system.
• Architectural choices impact the scalability, performance, and maintainability of a system.

• Common architectural choices include monolithic, microservices, serverless, and event-driven architectures.

• Consider factors such as the size of the team, the complexity of the project, and the expected growth when making architectural
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Q1. Engineering practices
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Q2. Quality control
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Q1. Leadership Skills
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Q2. Real scenarios to manage people
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Q1. Cultural fitness
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Q2. Location verification
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