Paytm Interview Questions and Answers

I applied for the Frontend role and test consisted of JS and React questions

Q1. What is Hoisting, Closures, Event loop etc and some code snippets
Add your answer
Q2. Given the code to flat the array ex : Input - [2,3,[4,5,[6,7],8,9,[0]]] Output : [2,3,4,5,6,7,8,9,0]
Ans. 
Flatten a nested array into a single-level array.
• Use recursion to iterate through each element of the array.

• If the element is an array, call the function recursively.

• If the element is not an array, add it to the result array.
Answered by AI
View 2 more answers
Q3. Write a Polyfill for flat function
Ans. 
Polyfill for flat function
• Create a function that takes an array and a depth as arguments

• Use recursion to flatten the array to the specified depth

• If depth is not specified, flatten the array completely

• Return the flattened array
Answered by AI
Add your answer
Q4. Write a js code to convert Roman to decimal number
Ans. 
JS code to convert Roman to decimal number
• Create a map of Roman numerals to their decimal values

• Loop through the Roman numeral string from right to left

• If the current numeral is less than the previous numeral, subtract it from the total

• Otherwise, add it to the total

• Return the total
Answered by AI
Add your answer
Q5. Create a dropdown(HTML Select tag) custom component in react.
Ans. 
Creating a custom dropdown component in React using HTML Select tag.
• Create a new component and import React

• Use the HTML Select tag to create the dropdown

• Use the map function to loop through the array of strings and create the options

• Add an onChange event to handle the selection and update the state

• Pass the array of strings as props to the component
Answered by AI
Add your answer

Q1. Create a Todo list component in react
Ans. 
Creating a Todo list component in React
• Create a new React component for the Todo list

• Use state to store the list of tasks

• Render the list of tasks using map()

• Add a form to add new tasks to the list

• Add a button to delete tasks from the list
Answered by AI
Add your answer
Q2. Js Code/React component to create a folder and file structure
Ans. 
Use Node.js fs module to create folder and file structure in React component
• Require fs module in React component

• Use fs.mkdirSync() method to create folder

• Use fs.writeFileSync() method to create file

• Use path.join() method to join folder and file paths

• Handle errors using try-catch block
Answered by AI
Add your answer
Q3. Write a code whose output should be 72 by making a call like this add(5,3).mul(9).calc();
Ans. 
Code to output 72 by calling add(5,3).mul(9).calc()
• Define a class with add, mul, and calc methods

• add method should add two numbers and return the class instance

• mul method should multiply the result with a number and return the class instance

• calc method should return the final result

• Call the methods in the given order to get the output 72
Answered by AI
Add your answer
Q4. Polyfill for promise.all()
Ans. 
Polyfill for promise.all() is a code that adds support for promise.all() in older browsers.
• Polyfill can be implemented using a combination of Promise and Array.prototype.reduce()

• The polyfill should return a promise that resolves when all promises in the input array have resolved

• If any promise in the input array rejects, the polyfill should reject with the reason of the first promise that rejected
Answered by AI
Add your answer
Q5. Write a code to convert an account number to asterisk ex: Input : PY12345 Output : PY***45
Ans. 
Code to convert account number to asterisk
• Create a function that takes in an account number as input

• Use string slicing to replace characters with asterisks

• Return the modified account number as output
Answered by AI
Add your answer

Q1. It was mostly sound previous experience
Add your answer
Q2. Mostly sound previous experience and few product design questions.
Add your answer

Q1. Why does Paytm company commit fraud with its agents and why does it not pay the salary of its agents on time? While working in Paytm, why is the salary held and why is the money not given?
Add your answer
Q2. Why is Paytm merchant not heard? Why is customer care number not reachable?
Add your answer
Q3. Talking about salary of 18000, why only ₹10000 is given in Paytm. Why is salary held?
Add your answer
Q4. When will I get my salary? The salary was promised on the 30th but did not come. The salary was promised on the 5th but did not come. Today is the 9th. When will my salary come? Why has my salary been put ...read more
Add your answer
Q5. How can the team leaders and HR at Paytm be so careless? Why is no one's salary being paid? Why is their salary being withheld?
Add your answer

Q1. Sound box & QR RELATED
Add your answer
Q2. Paytm company related
Add your answer
Q3. Jio company related
Add your answer