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Rakuten Interview Questions and Answers
51 Interview questions
Calculate the sum of an array, treating negative numbers as positive, using recursion and without recursion.
Create a variable to store the sum
Iterate through the array and add each element to the sum, treating negative numbers as positive
For the recursive solution, create a helper function that takes the array and the current index as parameters
In the recursive function, check if the current index is within the ar...
Peak and majority element finding algorithms
Peak element: binary search for element greater than both neighbors
Majority element: Boyer-Moore voting algorithm
Boyer-Moore: iterate through array, count occurrences of each element, return element with count > n/2
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 ...
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
Current trends in the industry include digital transformation, sustainability, and remote work.
Digital transformation is driving innovation and efficiency in processes and operations.
Sustainability is becoming a key focus with companies implementing eco-friendly practices and products.
Remote work is on the rise, leading to changes in workplace dynamics and collaboration.
Increased use of data analytics and AI for d...
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
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
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 an...
Functional programming focuses on functions and immutability, while object-oriented programming focuses on objects and encapsulation.
Functional programming uses pure functions and avoids side effects.
Object-oriented programming uses classes and objects to model real-world entities.
Functional programming emphasizes immutability, while object-oriented programming allows for mutable state.
Functional programming langu...
The company offers a range of software products and solutions to clients in various industries.
The company provides customized software solutions to meet the specific needs of each client.
Products include CRM systems, data analytics tools, and project management software.
Solutions may involve cloud-based services, mobile applications, and e-commerce platforms.
Rakuten Interview Experiences
90 interviews found
Anonymous
Selected
(2 Questions)
- Q1. HashMap DSA question
- Ans.
HashMap is a data structure that stores key-value pairs for efficient data retrieval and manipulation.
HashMap allows O(1) average time complexity for insertions, deletions, and lookups.
It uses a hash function to compute an index into an array of buckets or slots.
Example: In Java, HashMap<String, Integer> map = new HashMap<>();
Collisions are handled using techniques like chaining or open addressing.
Example o...
- Q2. DSA Question
(2 Questions)
- Q1. DSA Question & Project discussion
- Q2. DSA Question
I applied via Referral and was interviewed in Dec 2024. There were 2 interview rounds.
Hld question and coding question
Web crawler assignment to crawl e-commerce websites
Srinjoy Chatterjee
I applied via Naukri.com
(1 Question)
- Q1. Linklist, Java OOPs concept, Spring Boot questions
(3 Questions)
- Q1. Explain your project framework?
- Ans.
Our project framework is based on the Page Object Model design pattern, using Selenium WebDriver and TestNG for automation testing.
Page Object Model design pattern is used to create separate classes for each web page, making the code more organized and maintainable.
Selenium WebDriver is used for interacting with web elements and performing actions on the web pages.
TestNG is used for test case management, grouping, and ...
- Q2. Explain TestNG Framework usage?
- Ans.
TestNG is a testing framework used for automated testing in Java.
TestNG allows for easy configuration of test cases using annotations.
It supports parallel execution of test cases.
TestNG provides reporting and logging features for test results.
It allows for grouping of test cases for better organization.
TestNG supports data-driven testing using data providers.
- Q3. Explain Jenkins setup?
- Ans.
Jenkins is a popular open-source automation server used for continuous integration and continuous delivery.
Jenkins is installed on a server and can be accessed through a web interface.
It allows automation of tasks like building, testing, and deploying software.
Jobs in Jenkins are created to define the steps of the automation process.
Plugins can be added to Jenkins to extend its functionality, such as integrating with v...
Skills evaluated in this interview
I applied via Referral and was interviewed in Aug 2024. There were 2 interview rounds.
Linked list and string related
(2 Questions)
- Q1. Why do you want to join
- Ans.
I am passionate about testing and quality assurance, and I believe joining your team will allow me to further develop my skills and contribute to innovative projects.
Passionate about testing and quality assurance
Desire to develop skills and contribute to innovative projects
Belief that joining the team will be a valuable opportunity for growth
- Q2. How fast can you join
- Ans.
I can join within 2 weeks, depending on the notice period at my current job.
I can start within 2 weeks, pending any notice period at my current job
I am available to start immediately if needed
I can adjust my start date based on the company's requirements
Interview Preparation Tips
I applied via Approached by Company and was interviewed in Apr 2024. There was 1 interview round.
(3 Questions)
- Q1. Print All subset of an array of integers
- Ans.
Print all subsets of an array of integers
Use recursion to generate all possible subsets
For each element, include or exclude it in the subset
Base case: when all elements have been considered, print the subset
- Q2. Print length longest subsequence from two given strings
- Ans.
Find and print the length of the longest subsequence from two given strings.
Iterate through both strings and compare characters to find matching subsequences
Use dynamic programming to keep track of longest common subsequence
Return the length of the longest subsequence found
- Q3. Deep Basic Questions on C++ and golang, its comparisions
Interview Preparation Tips
- OOPS concepts, Slight touch on d
Skills evaluated in this interview
Hacker earth - arrays, string and trees concept question
(3 Questions)
- Q1. Question on Spring Boot, Hibernate and Spring Cloud
- Q2. DS Algo, binary search tree
- Q3. Docker/kubernetes concept
I applied via LinkedIn and was interviewed in May 2024. There was 1 interview round.
(2 Questions)
- Q1. All possible permutations of string
- Ans.
Generate all possible permutations of a given string
Use recursion to generate permutations
Swap characters to create different permutations
Store permutations in an array of strings
- Q2. SQL query to get employees coming to office
- Ans.
Use SQL query with WHERE clause to filter employees coming to office.
Use SELECT statement to retrieve data from the database.
Use WHERE clause to filter employees based on coming to office.
Consider using a column in the database that indicates whether an employee is coming to office or not.
Interview Preparation Tips
Skills evaluated in this interview
Market size assessment market for a new product
(1 Question)
- Q1. Current trends of Indsutry
- Ans.
Current trends in the industry include digital transformation, sustainability, and remote work.
Digital transformation is driving innovation and efficiency in processes and operations.
Sustainability is becoming a key focus with companies implementing eco-friendly practices and products.
Remote work is on the rise, leading to changes in workplace dynamics and collaboration.
Increased use of data analytics and AI for decisi...
I applied via Recruitment Consulltant and was interviewed in Dec 2024. There was 1 interview round.
About the project experience
Top trending discussions
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