LearningMate Solutions Developer Associate Interview Questions and Answers

Q1. Explain about Event loop
Ans. 
Event loop is a mechanism that allows for asynchronous programming by handling events and callbacks.
• Event loop is responsible for handling and executing events and callbacks in a non-blocking manner.

• It continuously checks the event queue and processes events one by one.

• Event loop is commonly used in JavaScript for handling asynchronous operations like setTimeout, setInterval, and AJAX requests.
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Ask to create a database design and API for a todo list app

Q1. Why do you want to join Byjus
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Q1. Mother vertex and connected city
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Leetcode aMedium to Hard

Q1. Question related Web architecture
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They discussed some easy questions on Node JS and Dp and heap , binary search

Q1. Introduce yourself
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Q2. What is multithreading and explain its usecases.
Ans. 
Multithreading is the ability of a CPU to execute multiple threads concurrently, improving performance and responsiveness.
• Multithreading allows for parallel execution of tasks, improving performance by utilizing multiple CPU cores.

• It is commonly used in applications that require handling multiple tasks simultaneously, such as web servers, video games, and data processing.

• Multithreading can help improve responsiveness i...read more
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Q1. Q1 difference between let and const
Ans. 
let is mutable and can be reassigned, const is immutable and cannot be reassigned
• let allows reassignment of values, const does not

• const must be initialized with a value, let can be declared without a value

• const is block-scoped, let is function-scoped
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Q2. Q2 what are closures?
Ans. 
Closures are functions that have access to variables from their containing scope even after the parent function has finished executing.
• Closures allow functions to maintain access to variables from their parent scope

• They are created when a function is defined within another function

• Closures are commonly used in event handlers and callbacks
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Q3. Q3. What is typeof null
Ans. 
typeof null returns 'object' in JavaScript.
• typeof null is 'object' in JavaScript

• This is a historical bug in JavaScript that has not been fixed for backward compatibility

• Example: console.log(typeof null) will output 'object'
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Q1. Q1. Find palindrome strings in an array of strings.
Ans. 
Finding palindrome strings in an array of strings.
• Iterate through each string in the array.

• For each string, check if it is equal to its reverse to determine if it is a palindrome.

• Store palindrome strings in a separate array or print them out.
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Q2. Q2. Explain debouncing with example.
Ans. 
Debouncing is a technique used to limit the rate at which a function is called.
• Debouncing is used to prevent multiple rapid calls to a function, typically in response to user input.

• It involves setting a delay before allowing the function to be called again.

• Example: Debouncing a search input field to only trigger the search function after the user has stopped typing for a certain period.
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2.5 Hours 2 Coding que and sql query and topin tech platform

Q1. Based on boolean matrix
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Q2. Find k closest node of given given node in a BST.
Ans. 
Find k closest nodes to a given node in a BST.
• Perform an inorder traversal of the BST to get a sorted list of nodes.

• Use a priority queue to keep track of the k closest nodes based on their absolute difference with the target node.

• Populate the priority queue with the first k nodes from the inorder traversal.

• For each subsequent node, calculate its absolute difference with the target node and compare it with the top eleme...read more
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Python technical SQL basic

Q1. Check if string is palindrome
Ans. 
Check if a string is the same forwards and backwards
• Iterate through the string from both ends and compare characters

• Use built-in functions like reverse() to check for palindrome

• Ignore spaces and punctuation when checking for palindrome
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