Lenskart Software Engineer Interview Questions and Answers for Experienced

Q1. Discussion with Lead Engineer around basics of javascript, HTML, CSS, and Resume based question
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Q1. Discussion with Technical Architect around Some advanced concepts of javascript, React, Some aptitude questions.
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Q1. Discussion with hiring manager. Understanding around the project, roles and responsibility of the position I was being hired for.
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It was a ideal machine coding round. Consisting of a question to be completed within 45 mins. For a given manager to employee hierarchy, count direct + indirect repartees.

Q1. OOPS, java, data structure
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Q2. Coding assignment for binary search
Ans. 
Implement binary search algorithm to find a target string in a sorted array of strings.
• Ensure the array of strings is sorted before performing binary search.

• Compare the target string with the middle element of the array and adjust the search range accordingly.

• Repeat the process until the target string is found or the search range is exhausted.
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Q1. What is your Notice period
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Q2. Expectation from new job
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Q1. Print the nodes of a n-ary tree in an arc wise manner as seen from the outside.
Ans. 
Print nodes of n-ary tree in arc wise manner from outside
• Traverse the tree level by level from outside to inside

• Use a queue to keep track of nodes at each level

• Print the nodes at each level in a clockwise or anticlockwise manner
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Q1. Design hld interview asked question
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Q2. Design lld asked question
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Its mcqs where we need to answer 25 questions

Q1. Knowledge if sql based on experience. Good to know joins well
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Machine coding - design food ordering service,

Q1. Sort array having 0 , 1 and 2. do it in single pass
Ans. 
Use Dutch National Flag algorithm to sort array of 0s, 1s, and 2s in single pass.
• Initialize three pointers low = 0, mid = 0, high = n-1 where n is the length of the array.

• Iterate through the array and swap elements based on their values and positions.

• Example: Input array ['0', '1', '2', '0', '1', '2'] should be sorted as ['0', '0', '1', '1', '2', '2'].
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Q2. Given tree and list of nodes to be deleted. return all new trees created after the deletion
Ans. 
Return new trees after deleting specified nodes from a given tree
• Traverse the tree and delete nodes that match the given list

• For each deleted node, create a new tree with the remaining nodes

• Return all new trees created after deletion
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Q1. Design Restaurant management sytem
Ans. 
Restaurant management system to streamline operations, orders, inventory, and customer service.
• Include features for table management, order processing, menu customization, inventory tracking, and customer feedback.

• Implement user roles for staff, managers, and administrators with varying levels of access and permissions.

• Integrate payment processing systems for seamless transactions and reporting.

• Utilize data analytics t...read more
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Q1. Discussed about projects in depth
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Q2. Question around redis, kafka and all
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Mostly DSA expect DP, graph problems

Q1. Graph traversal + DP
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