60+ Enzene Biosciences Interview Questions and Answers

Given a number x, find the minimum number of operations (decrement by 1 or multiply by 2) to convert it to y.

• Use a breadth-first search (BFS) approach to explore all possible operations and find the minimum number of steps.

• Start with x and generate all possible next numbers by decrementing or multiplying by 2.

• Keep track of the number of steps taken to reach each number and stop when y is found.

• Use a queue to implement the BFS algorithm.

• Example: x = 10, y = 30. Possible steps:...read more

Create subarrays with sum = 0 from given array of integers.

• Iterate through the array and keep track of the running sum.

• Store the running sum in a hashmap and check if the current sum - any previous sum equals 0.

• If yes, then the subarray between those two indices has a sum of 0.

The question involves finding the pivot in a rotated sorted array using combinatorics and count sort.

• To find the pivot in a rotated sorted array, we can use a modified binary search algorithm.

• First, we compare the middle element with the first element to determine if the pivot is in the left or right half.

• Then, we continue dividing the array in half and adjusting the search range based on the pivot's location.

• Count sort is a sorting algorithm that works well when the range of...read more

Design a parking lot system with features like parking, retrieving, and tracking available spots.

• Create a ParkingLot class with attributes like total number of spots, available spots, and a list of parked vehicles.

• Implement methods for parking a vehicle, retrieving a vehicle, and tracking available spots.

• Use data structures like arrays or lists to manage parked vehicles and available spots.

• Consider implementing features like ticketing system, vehicle size restrictions, and pa...read more

Find the longest subsequence in an array with sum zero.

• Iterate through the array and keep track of the running sum.

• Store the running sum in a hashmap along with the index.

• If the same sum is encountered again, the subsequence between the two indices has a sum of zero.

Design a hotel booking system for managing reservations and availability.

• Use a database to store hotel information, room availability, and reservations.

• Implement user authentication and authorization for booking.

• Include a search feature for users to find available rooms based on their criteria.

• Allow users to make reservations, modify or cancel them.

• Send confirmation emails to users after successful bookings.

The question involves finding the sum of right leaf nodes and swapping nodes in groups of k.

• The sum of right leaf nodes can be found by traversing the tree and checking if a node is a right leaf node.

• Swapping nodes in groups of k can be done by iterating through the linked list and swapping the nodes in each group.

• Examples: For the sum of right leaf nodes, consider a binary tree with nodes 1, 2, 3, 4, 5. The sum would be 5. For swapping nodes in groups of k, consider a linked...read more

The question involves reversing nodes in groups of k and finding the sum of right leaf nodes.

• Implement a function to reverse nodes in groups of k

• Traverse the reversed linked list and find the sum of right leaf nodes

• Handle edge cases like when the number of nodes is not a multiple of k

LLD for a S3 or a storage based system involves designing the detailed architecture and components of the system.

• Define the data model including objects, metadata, and storage classes

• Design the system components like storage nodes, metadata servers, and access control mechanisms

• Consider scalability, fault tolerance, and data consistency in the design

• Implement features like versioning, encryption, and access control policies

• Optimize for performance and cost efficiency

The diameter of a tree is the longest path between two leaf nodes in the tree.

• Calculate the longest path between two leaf nodes in the tree

• This can be done by finding the height of the left and right subtrees and adding them together

• The diameter of the tree is the maximum of either the diameter of the left subtree, the diameter of the right subtree, or the sum of the heights of the left and right subtrees

LLD for a storage based system involves designing the detailed architecture and components of the system to efficiently store and retrieve data.

• Identify the requirements for the storage system, including data types, volume, access patterns, and performance expectations.

• Design the data storage architecture, including data structures, indexing mechanisms, and storage technologies like databases or file systems.

• Define the data access and retrieval mechanisms, such as APIs, proto...read more

Zigzag level order traversal of tree involves traversing the tree level by level in a zigzag pattern.

• Use a queue to perform level order traversal of the tree

• Alternate between left to right and right to left traversal for each level

• Store the nodes at each level in separate arrays

Apache Spark is a distributed computing framework for big data processing.

• Apache Spark is an open-source distributed computing framework.

• It provides an interface for programming entire clusters with implicit data parallelism and fault tolerance.

• Spark uses in-memory processing for speed and can run on Hadoop, Mesos, Kubernetes, or in standalone mode.

• It supports multiple programming languages like Scala, Java, Python, and R.

• Spark has libraries for SQL, streaming, machine learni...read more

Find the maximum length of increasing subsequence in an array of strings.

• Use dynamic programming to keep track of the length of increasing subsequences ending at each index.

• Iterate through the array and update the length of increasing subsequences.

• Return the maximum length found.

A cloud storage service like Google Drive for storing and sharing files

• Allow users to upload, store, and organize files in folders

• Provide sharing options for files and folders with permissions

• Include collaboration features like real-time editing and commenting

• Offer integration with other services like Google Docs, Sheets, and Slides

The left view of a binary tree is the set of nodes visible when the tree is viewed from the left side.

• Traverse the tree in a level order manner and keep track of the first node at each level.

• Use a queue to store nodes at each level and update the left view nodes accordingly.

• Example: For a binary tree with root node 1, left child 2, and right child 3, the left view would be [1, 2].

Destination packages are pre-planned travel itineraries that include accommodation, transportation, and activities.

• Destination packages are designed to provide a hassle-free travel experience.

• They can be customized based on the traveler's preferences and budget.

• Popular destination packages include beach vacations, city breaks, and adventure trips.

• They often include guided tours, meals, and tickets to attractions.

• Destination packages can be booked through travel agencies or on...read more

A cinema API is a software interface that allows developers to access and interact with cinema-related data and services.

• Provides information about movies, showtimes, theaters, and ticket availability

• Allows users to search for movies, view trailers, and book tickets

• May include features like seat selection, payment processing, and user reviews

• Can integrate with external services like payment gateways and movie databases

A vector is a dynamic array that can resize itself as needed.

• A vector is typically implemented using a dynamically allocated array.

• It provides constant time access to elements using index.

• Vectors can grow in size by reallocating memory when needed.

• Example: vector vec;

• Example: vec.push_back(10);

Reverse a linked list by changing the pointers direction.

• Start with three pointers: current, previous, and next.

• Iterate through the linked list, updating the pointers to reverse the direction.

• Update the head pointer to the last node to complete the reversal.

Resume points are concise descriptions of your work experience, skills, and achievements listed on your resume.

• Resume points should be clear, specific, and quantifiable.

• Use action verbs to start each point, such as 'developed', 'implemented', 'analyzed'.

• Include relevant metrics or results to demonstrate impact, such as 'increased sales by 20%' or 'reduced processing time by 30%'.

Build a system for generating and managing Tiny URLs

• Use a unique identifier for each long URL to generate a short URL

• Store the mapping of short URL to long URL in a database

• Implement a redirect mechanism to redirect users from short URL to long URL

• Consider adding expiration dates for short URLs to manage storage

• Implement analytics to track usage of short URLs

Extensive experience in designing, implementing, and managing cloud-based solutions.

• Designed and implemented scalable cloud architectures using AWS, Azure, or Google Cloud

• Managed cloud infrastructure for high-traffic web applications

• Experience with containerization technologies like Docker and Kubernetes

• Implemented serverless computing solutions using AWS Lambda or Azure Functions

Managed a large-scale software development program for a financial services company.

• Led a team of 20 developers and testers in delivering a new online banking platform

• Implemented Agile methodologies such as Scrum to improve project efficiency

• Collaborated with stakeholders to define project scope and prioritize features

• Managed project budget and resources to ensure on-time delivery