Cyber Sapient Interview Questions and Answers

90 minute test on hacker rank consisting of 3 coding questions all of medium difficulty. Most candidates are required to solve more than 1 question.

Q1. Questions on concepts of OOPS and Operating Systems.
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Q2. Find least common ancestor of a binary tree.
Ans. 
Find the lowest common ancestor of a binary tree.
• Traverse the tree recursively from the root node.

• If the current node is null or matches either of the given nodes, return the current node.

• Recursively search for the nodes in the left and right subtrees.

• If both nodes are found in different subtrees, return the current node.

• If both nodes are found in the same subtree, continue the search in that subtree.
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Q3. Find first missing positive integer from an array for non-negative integers.
Ans. 
Find first missing positive integer from an array of non-negative integers.
• Create a hash set to store all positive integers in the array

• Loop through the array and add all positive integers to the hash set

• Loop through positive integers starting from 1 and return the first missing integer not in the hash set
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Q1. Design a parking lot
Ans. 
Design a parking lot
• Consider the size and capacity of the parking lot

• Decide on the layout and organization of parking spaces

• Implement a system to manage parking availability and reservations

• Include features like ticketing, payment, and security

• Consider scalability and future expansion
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Q1. Given a grid which represents an ocean( For all index i,j if mat[i][j] = 1 is island and mat[i][j] = 0 means water). Find the island with largest area.
Ans. 
Find the largest island area in a grid representing an ocean using DFS or BFS.
• Use Depth-First Search (DFS) or Breadth-First Search (BFS) to explore the grid.

• Mark visited cells to avoid counting them multiple times.

• Count the size of each island during the traversal.

• Example: For a grid [[1,0,0],[1,1,0],[0,0,1]], the largest island has area 3.

• Keep track of the maximum area found during the exploration.
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Q2. Given list of strings group them into distinct anagrams.
Ans. 
Group list of strings into distinct anagrams.
• Create a hash table with sorted string as key and list of anagrams as value.

• Iterate through the list of strings and add each string to its corresponding anagram list in the hash table.

• Return the values of the hash table as a list of lists.
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The aptitude section will consist of multiple-choice questions (MCQs).

There will be coding problems relevant to the domain in which we are interviewing.

Q1. What do you hope to achieve in the next two years?
Ans. 
In the next two years, I hope to enhance my technical skills, take on more challenging projects, and potentially move into a leadership role.
• Enhance technical skills through continuous learning and certifications

• Take on more challenging projects to expand my knowledge and experience

• Work towards potentially transitioning into a leadership role within the team
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Q1. Qs related to javascript
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Q1. Why should we hire you
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