Practo Web Developer Interview Questions and Answers

Q1. What is react.js? Ans: React.js is javascript library used for building the UI components.
Ans. 
React.js is a JavaScript library used for building user interfaces by creating reusable UI components.
• React.js allows developers to create interactive user interfaces efficiently.

• It uses a virtual DOM for optimal performance by updating only the necessary components.

• React components can be reused across different parts of an application.

• It follows a unidirectional data flow, making it easier to manage state and data.

• Re...read more
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Q2. What is JavaScript? Ans: javaScript is type free language that means to declare the variable we don't any specific datatype and values. javascript is a dynamic type language.
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Q3. Why javascript is Dynamic language? Ans: The type of variable is dynamically changed based on the its current value. that is the reason the javascript is treated as as dynamic language.
Ans. 
JavaScript is considered a dynamic language because variables can change types based on their current value.
• Variables in JavaScript can hold different types of values at different times

• The type of a variable is determined at runtime, not at compile time

• Dynamic typing allows for flexibility and ease of use in JavaScript programming

• Example: a variable can start as a number and then be reassigned as a string
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Q4. How to run the jscode? Ans: In terminal type the node filename.js
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Q1. Why should i hire you? Ans: you should hire me because of i have great skills on the frontend development. and improve the organizations standard with my work and skills.
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Q2. What is salary expection per annum? Ans: upto 600000
Ans. 
My salary expectation is up to 600,000 per annum based on my experience and skills.
• Consider factors such as experience, skills, industry standards, and location when determining salary expectations.

• Research average salaries for front end developers in your area to ensure your expectations are realistic.

• Be prepared to negotiate and discuss other benefits in addition to salary.
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My mostly question were around node js frame works and other tools

Q1. Case study for the question asked
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Q2. Tell me something more about you
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Question are very tough and faad

Question like trees linked list and graphs

1 Hr coding round, Leetcode medium problems like Minimum Grid sum & Basic calculator

Q1. They asked me about web workers and web assembly. The whole questions were planned to reject the candidate.
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Q1. Machine oding asked to implement LLD
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Q2. What is a semaphore
Ans. 
A semaphore is a synchronization object used in concurrent programming to control access to shared resources.
• Semaphores can be used to limit the number of threads accessing a resource at the same time

• They can be implemented as counting semaphores or binary semaphores

• Example: In a producer-consumer problem, semaphores can be used to control access to a shared buffer
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Q1. Pakage and company placement etc
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