Oriserve Interview Questions, Process, and Tips

Q1. Duplicate element in array
Ans. 
Find and return the duplicate element in an array of strings.
• Iterate through the array and keep track of elements seen so far using a hash set.

• If an element is already in the hash set, return it as the duplicate element.

• Example: ['apple', 'banana', 'apple', 'orange'] should return 'apple' as the duplicate element.
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Q2. Async await in js
Ans. 
async await in JavaScript is a way to write asynchronous code in a synchronous manner.
• async functions return a Promise

• await keyword is used to pause the execution of async functions until a Promise is settled

• async/await makes asynchronous code easier to read and write compared to using callbacks or Promises
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Q1. Cant specify as per company policy
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Q2. Cant specify
Ans. 
The question was related to designing a scalable system for handling large amounts of data.
• Focus on distributed systems and scalability

• Consider using technologies like Hadoop, Spark, or Kafka

• Discuss strategies for data partitioning and replication
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Q1. Cant specify as per company policy
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Q1. DSA question of DP
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Q2. Backend and Database discussion
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Q1. What is react dom?
Ans. 
React DOM is a package that provides DOM-specific methods that can be used to render React components.
• React DOM is used to render React components in the DOM.

• It provides methods like ReactDOM.render() to render components.

• React DOM takes care of updating the DOM to match the React components.
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Q2. What is SPA and how is react SPA?
Ans. 
SPA stands for Single Page Application. React is a popular JavaScript library for building SPAs.
• SPA is a web application that loads a single HTML page and dynamically updates the page as the user interacts with it.

• React is a JavaScript library for building user interfaces, including SPAs.

• React uses a virtual DOM to efficiently update the UI without reloading the entire page.

• React Router is commonly used with React to h
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