Pagarbook Senior Bdm Manager Interview Questions and Answers

Will be given Requirement to write code for Restraunt. Based on that have write code for delivering orders by delivery boys.

Q1. OOPS Concepts, Java Basics, Collections, MultiThreading
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Q1. Lazy loading in react
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Lazy loading in React is a technique used to improve performance by loading components only when they are needed.
• Lazy loading helps reduce initial load time by splitting the code into smaller chunks.

• React.lazy() and Suspense are commonly used for lazy loading in React.

• Lazy loading is especially useful for large applications with many components.
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Q2. Cache bursting
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Q3. Difference between == and ===
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The difference between == and === is that == checks for equality after type coercion, while === checks for equality without type coercion.
• == is a loose equality operator that performs type coercion before comparing two values.

• === is a strict equality operator that does not perform type coercion before comparing two values.

• Example: 1 == '1' will return true, but 1 === '1' will return false.
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Q1. Largest island (graph question)
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Q2. SQL question related to joins
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Q1. About the databases and questions from system design
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Q1. Questions based on concurrency , suitable databases HLD,LLD,book my show design
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Q1. Salary discussion
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Q1. Implement cache in the given architecture where read and write both are pretty frequent. What are the cache eviction mechanisms and which one should we follow here ?
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Q2. Rotten oranges - leetcode graph question
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Assignment to develop a prototype

Q1. Face to face questions
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Q2. Java Question Technical & coding
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Q3. Mongodb & Mysql Question
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Q1. Resume based questions
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Q2. Event loop in nodejs
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Event loop in Node.js manages asynchronous operations by executing callback functions when certain events occur.
• Event loop is responsible for handling I/O operations, timers, and callbacks in Node.js

• It allows Node.js to perform non-blocking operations efficiently

• Event loop continuously checks the event queue for new events to execute
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Q3. Javascript es6 questions
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Q1. Promises in javascript
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Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.
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