Reliance Retail Database Support Engineer Interview Questions and Answers

Mostly on js basics. Event loop, hoisting, GraphQL

Q1. How to implement Cadence algorithm
Ans. 
Cadence algorithm is used for real-time stream processing of data.
• Cadence is a distributed system for managing workflows.

• It uses a programming model called the Cadence Workflow Model.

• The Cadence server is responsible for managing the state of workflows.

• The Cadence client is responsible for executing the workflow tasks.

• Cadence provides a lot of features like retries, timeouts, and error handling.
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Q2. How does vdom works in react
Ans. 
VDOM stands for Virtual Document Object Model, which is a lightweight copy of the actual DOM used by React for efficient rendering.
• VDOM is a tree-like structure that React uses to keep track of changes in the UI.

• When a component's state changes, React creates a new VDOM tree and compares it with the previous one to identify the changes.

• React then updates only the parts of the actual DOM that need to be changed, resulti...read more
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Round duration - 120 Minutes
Round difficulty - Easy

Q1. 
Check Word Presence in String
Given a string S and a list wordList containing N distinct words, determine if each word in wordList is present in S. Return a boolean array where the value at index 'i' indi...read more
Ans. 
Given a string and a list of words, determine if each word in the list is present in the string and return a boolean array indicating their presence.
• Iterate through each word in the word list and check if it is present in the string.

• Use a boolean array to store the presence of each word in the string.

• Consider case sensitivity when checking for word presence.

• Do not use built-in string-matching methods.

• Return the boolean
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Round duration - 20 Minutes
Round difficulty - Easy

LinkedList add numbers

Q1. Multithreaded question
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Q2. More multithreading questions
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It includes technical along with DSA

Q1. Asks about the core concepts
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Q2. The question are related to the skill set of an individual
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Q1. More of an casual discussion
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Q1. How can fragments communicate among themselves
Ans. 
Fragments can communicate among themselves using interfaces, shared view models, and activity callbacks.
• Use interfaces to define communication contract between fragments

• Implement the interface in the hosting activity and pass it to the fragments

• Use shared view models to share data between fragments

• Use activity callbacks like onActivityResult() to communicate between fragments
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Find cycle in a linked list

Q1. Javascript questions
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Q1. Coding question
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Q1. System design round
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Q1. Behavioral question
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Q1. Discussed project on resume
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Q2. Microservices patterns
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Leetcode easy medium questions

Q1. Graph question was asked
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Q2. Tree Question was asked
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