Rakuten Software Engineer Interview Questions, Process, and Tips

Basic Reasoning and DS, Algo Question and 4 Coding in java and 3 Sql commands question on grouping

Q1. What is jvm, how objects created and managed in jvm memory ?
Ans. 
JVM is a virtual machine that executes Java bytecode. Objects are created and managed in JVM memory using heap and stack.
• JVM stands for Java Virtual Machine

• It is responsible for executing Java bytecode

• Objects are created in JVM memory using heap and stack

• Heap is used for storing objects and stack is used for storing method calls

• Garbage collector is responsible for managing memory in JVM
Answered by AI
Add your answer
Q2. What is polymorphism, overriding? demostrate by code example?
Ans. 
Polymorphism is the ability of an object to take on many forms. Overriding is when a subclass provides a specific implementation of a method that is already provided by its parent class.
• Polymorphism allows objects to be treated as if they are of any of their compatible types.

• Overriding is used to provide a specific implementation of a method that is already provided by its parent class.

• Example: Animal class has a metho...read more
Answered by AI
Add your answer
Q3. Whatis stack? live implementation in code?
Ans. 
A stack is a data structure that follows the Last-In-First-Out (LIFO) principle.
• Stack is a linear data structure

• Elements are added and removed from the same end called the top

• Common operations include push (add element) and pop (remove element)

• Stack can be implemented using arrays or linked lists
Answered by AI
View 2 more answers

Q1. Linklist, Java OOPs concept, Spring Boot questions
Add your answer

Hacker earth - arrays, string and trees concept question

Q1. Question on Spring Boot, Hibernate and Spring Cloud
Add your answer
Q2. DS Algo, binary search tree
Add your answer
Q3. Docker/kubernetes concept
Add your answer

Array string easy medium questions

20 questions were there to solve

Q1. Easy managerial round
Add your answer