Jio Platforms Interview Questions, Process, and Tips

Machine code test related to javascript and mcq questions from output based

Q1. Write code for promise and explain. Write html form from scratch for js. Coding questions related to array
Ans. 
Answering coding questions related to promises, HTML forms, and arrays.
• Promises in JavaScript are used for asynchronous programming. They represent a value that may be available now, in the future, or never.

• Example of a promise code snippet: const myPromise = new Promise((resolve, reject) => { setTimeout(() => { resolve('Promise resolved'); }, 2000); });

• HTML form can be created using

  tag and various inpu...read more
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Q2. Write code for promise
Ans. 
A promise is an object representing the eventual completion or failure of an asynchronous operation.
• Create a new promise using the Promise constructor

• Use the resolve and reject functions to handle the success or failure of the asynchronous operation

• Chain .then() and .catch() methods to handle the resolved or rejected promises respectively
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Q3. Write react component code for use memo use callback
Ans. 
React component code using useMemo and useCallback
• Use useMemo to memoize a value and useCallback to memoize a function

• Example: const memoizedValue = useMemo(() => computeExpensiveValue(a, b), [a, b]);

• Example: const memoizedCallback = useCallback(() => { doSomething(a, b); }, [a, b]);
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Q4. Create own filter method
Ans. 
Custom implementation of filter method for arrays
• Create a function that takes an array and a callback function as parameters

• Iterate through the array and apply the callback function to each element

• If the callback function returns true for an element, add it to a new array
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Q5. Create pagination work flow
Ans. 
Pagination work flow involves dividing content into pages for easier navigation.
• Determine total number of items to be paginated

• Calculate total number of pages based on items per page

• Display page numbers for navigation

• Allow users to navigate to previous and next pages

• Update content based on selected page number
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Q1. What is your name
Ans. 
My name is John Smith.
• Full name is John Smith

• Common name

• No need for additional details
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Q2. What is your qualifications
Ans. 
I have a Bachelor's degree in Business Administration and 3 years of experience in customer support roles.
• Bachelor's degree in Business Administration

• 3 years of experience in customer support roles

• Strong communication and problem-solving skills

• Ability to work well under pressure

• Experience using CRM software and ticketing systems
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Q3. Where do you live
Ans. 
I live in a cozy apartment in downtown Los Angeles.
• I live in downtown Los Angeles

• I reside in a cozy apartment

• My address is in the city center
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Normal group discussion topics

Q1. Object oriented programming,dsa
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Q1. SOLID , DRY, K.I.S.S principles
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SOLID, DRY, K.I.S.S are software design principles to ensure code quality and maintainability.
• SOLID: Encourages writing clean, maintainable, and scalable code by following five principles - Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion.

• DRY (Don't Repeat Yourself): Avoids duplication in code by extracting common functionality into reusable components or functions.

• K....read more
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Q2. Event Loop, React Fiber, Try catch block, Finally keyword, React Memo , HOC
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Hashing based questions , one DP and one graph

Q1. Resume discussion
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Q2. Rolling hash dsa problem
Ans. 
Rolling hash is a hashing technique used in data structures and algorithms to efficiently compare substrings of text.
• Rolling hash is used in algorithms like Rabin-Karp string matching algorithm.

• It involves updating the hash value of a substring by removing the contribution of the first character and adding the contribution of the next character.

• It is useful for comparing substrings in constant time complexity.
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