Legrand Technical Support Engineer Interview Questions and Answers for Experienced

Tomarrow, power system

Machine power system drive

They asked to find the elements which are present more than once. I solved it using map in c++

Q1. Explain about your favorite algorithm
Ans. 
My favorite algorithm is Dijkstra's algorithm for finding the shortest path in a graph.
• Dijkstra's algorithm is a greedy algorithm that finds the shortest path between nodes in a graph.

• It works by maintaining a priority queue of nodes to visit next, updating the shortest distance to each node as it explores the graph.

• The algorithm is commonly used in routing and network optimization.

• Example: Finding the shortest route b
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Q2. Tell about different types of deadlocks
Ans. 
Deadlocks occur when two or more processes are unable to proceed because each is waiting for the other to release a resource.
• Resource deadlocks: Processes hold resources and wait for others to release resources. Example: Process A holds resource X and waits for resource Y, while Process B holds resource Y and waits for resource X.

• Communication deadlocks: Processes wait for messages from each other indefinitely. Example...read more
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Q3. Tell about you project.
Ans. 
Developed a web application for online shopping with user authentication and payment gateway integration.
• Implemented user authentication using JWT tokens

• Integrated Stripe API for payment processing

• Designed responsive UI using React and Bootstrap
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30min and ask one coding question

30min and ask 2 coding question

Q1. Can you explain the difference between a stack and a queue and provide a real-world example where each would be used.
Ans. 
A stack is a Last In First Out (LIFO) data structure, while a queue is a First In First Out (FIFO) data structure.
• Stack: LIFO - Last In First Out. Example: browser history where the last page visited is the first to be accessed.

• Queue: FIFO - First In First Out. Example: a line at a grocery store where the first person in line is the first to be served.
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Q2. Given an array of integers, write a function to find the two numbers that add up to a specific target. How would you optimize this solution?
Ans. 
Function to find two numbers in array that add up to target. Optimize solution.
• Use a hash map to store each number and its index as you iterate through the array.

• For each number, check if the difference between the target and the number exists in the hash map.

• Return the indices of the two numbers that add up to the target.
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