Lenskart Software Engineer Interview Questions and Answers

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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