Rakuten Applications Engineer Interview Questions and Answers

4 coding question easy level questions based on arrays and strings

Code pairing round need to use oops to solve the problem

Q1. Two sum problem
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Q2. Internal working of hashmap
Ans. 
HashMap in Java is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.
• HashMap uses hashing to store and retrieve key-value pairs

• It uses an array of linked lists to handle collisions

• The key's hash code is used to determine the index in the array where the key-value pair is stored

• HashMap allows one null key and multiple null values

• Example: HashMap<String, Integer> map = new
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Q3. Sql queries on aggregate function
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Q1. Gender equality
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Q2. Situation based question
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Q1. Basic interview question
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Q1. Basic interview questions
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Q1. Basic info of application development and upload process
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Q1. Had Technical Interview
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Q1. Discussion with manager
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Q1. Had HR discussion one to one
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Q1. Select from employees tables all those who don't work in any department.
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Q2. What is a cursor and write a query
Ans. 
A cursor is a database object used to retrieve data from a result set one row at a time.
• A cursor is used to iterate through a result set.

• It can be used to update or delete rows in a table.

• Example query: DECLARE cursor_name CURSOR FOR SELECT column1, column2 FROM table_name;

• Example usage: OPEN cursor_name; FETCH NEXT FROM cursor_name INTO @variable1, @variable2;

• Example usage: CLOSE cursor_name; DEALLOCATE cursor_name;
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Q3. How early you can join
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Coding plus aptitude

Code pairing round with one question and an hour to solve

Q1. Oops, dsa, java
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Q2. Projesct related
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Q1. Cultural fit round was kinda HR but more topics involved
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2 leetcode medium level type problems were given. This was a cut-off test were majority will be cut-off.

Long coding round - Paired with another thoughtworker

Q1. Questions on project
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Q2. Frameworks related
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Coding test contains 4 coding question easy to medium, Topic Array, String but DSA questions are in image formate first you have to decode the image then code.

Q1. Some question from resume project.
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Q2. How we can improve this project
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Q3. Add 20% discount code, Implement cashback
Ans. 
To add a 20% discount code and implement cashback in an application.
• Create a discount code field in the application where users can enter the code to avail 20% off.

• Calculate the discounted price by applying the 20% discount on the original price.

• Implement a cashback feature where users receive a certain percentage of the purchase amount back as cashback.

• Ensure that the cashback amount is credited to the user's account
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Online hackerrank test

Q1. Code pairing round
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Q2. Solving a problem and improving it
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Q1. Question on previous experience
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Q1. Basic HR questions
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