Rakuten Golang Developer Interview Questions and Answers

First round was aptitude test of 60 MCQs on Java , core Java in mettl platform.

Second round was coding round
one easy and one medium leetcode question.

Q1. In this round discussed about projects .
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Q1. About yourself, what do you know about company? , How to overcome difficulties if task assigned is incomplete before due? Why are you switching job ? Are you ready to work on different techstack?
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Q1. There were two technical and one HR round. Question were scenario based on sql and .net applications.
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Q2. Replication of Databases
Ans. 
Replication of databases involves copying and maintaining multiple copies of the same database for redundancy and fault tolerance.
• Replication helps in ensuring high availability and fault tolerance by having multiple copies of the same data.

• There are different types of replication such as master-slave replication, master-master replication, and multi-master replication.

• Replication can be synchronous or asynchronous, wi...read more
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Q1. I was not selected for round two
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Q2. I am not aware of question in 2nd technical
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Q1. I was not selected for HR round
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Online zoom coding test will be there - 4 questions - 2 about output of code & 2 about technical questions.

Q1. Polymorphism and explain about virtual polymorphism
Ans. 
Polymorphism is the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Virtual polymorphism is achieved through virtual functions in C++.

• Virtual functions allow a function in a base class to be overridden in a derived class.

• Example: Animal class with virtual function 'makeSound' overridden in Dog a
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Q2. Write code for virtual polymorphism and explain
Ans. 
Virtual polymorphism allows objects of different classes to be treated as objects of a common superclass.
• Create a base class with virtual functions

• Create derived classes that override the virtual functions

• Use pointers or references of the base class to call the overridden functions
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Q1. About yourself should explain
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Q2. Reason for job change
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Q3. Salary negotiations and location
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Normal coding round with simple oa complexity

Q1. Discussion on projects
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Q2. Culture fit check
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Q1. How does consumer, producer work in kafka
Ans. 
Consumers read data from topics, while producers write data to topics in Kafka.
• Consumers subscribe to topics to read messages from them

• Producers publish messages to topics for consumers to read

• Consumers can be part of a consumer group to scale out consumption

• Producers can specify key for messages to control partitioning
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Q1. SOLID principles
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Q2. Microservice Architecture and Kafka
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Q1. Questions on spring boot and question around spring annotations and its benifits
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Q2. Questions on Java 8 - 21 versions such as virtual threads and stream API
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Q3. Question on Databases fundamentals.
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Asked some basic level questions

Asked little bit hard questions

Asked depth questions and wrote some sample programs

Q1. Wrote some sample program
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Q1. Salary discussion
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