Basis Vectors Interview Questions and Answers

Q1. Describe projects?
Ans. 
I have worked on various projects ranging from data analysis to machine learning models.
• Developed a sentiment analysis model using natural language processing techniques

• Implemented a recommendation system based on collaborative filtering algorithm

• Worked on a predictive maintenance project for optimizing equipment performance
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Q2. Explain architecture of Efficient-nets
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EfficientNets are a family of convolutional neural networks that have been designed to achieve state-of-the-art accuracy with fewer parameters and FLOPS.
• EfficientNets use a compound scaling method to balance network depth, width, and resolution for optimal performance.

• They are based on a baseline network architecture called EfficientNet-B0, which is then scaled up to create larger models like EfficientNet-B1, Efficient...read more
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Q3. Explain transformers architecture
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Transformers architecture is a deep learning model that uses self-attention mechanism to process sequential data.
• Transformers consist of an encoder and a decoder, each composed of multiple layers of self-attention and feed-forward neural networks.

• Self-attention mechanism allows the model to weigh the importance of different input tokens when making predictions.

• Transformers have achieved state-of-the-art performance in ...read more
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Q4. Longest sub array question in python.
Ans. 
Find the longest subarray of strings in a given array.
• Iterate through the array and keep track of the current subarray length.

• Reset the subarray length when encountering a non-string element.

• Return the length of the longest subarray found.
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Q1. About family and past life
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Q2. Past internships and learnings
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Q3. College life and what they expect.
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Q1. Rate yourself in js, node js, react, MongoDB (separately)
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Q2. Typeof null, typeof undefined, typeof {}, typeof NaN
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Q3. What changes came in es6
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ES6 introduced several new features and improvements to JavaScript, making it more powerful and efficient.
• Arrow functions for more concise syntax

• Let and const for block-scoped variables

• Classes for easier object-oriented programming

• Template literals for easier string interpolation

• Default parameters and rest parameters for function arguments

• Destructuring assignment for easier data extraction

• Promises for asynchronous prog
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Q4. This keyword, closures, hoisting
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Q5. Are let and cont variables hoisted?
Ans. 
Yes, let and const variables are hoisted but not initialized.
• let and const variables are hoisted to the top of their block scope, but they are not initialized until the actual line of code is executed.

• This means that you cannot access a let or const variable before it is declared in the code.

• For example, trying to access a let variable before it is declared will result in a ReferenceError.
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Q6. What is global context
Ans. 
Global context refers to the overall environment or setting in which something exists or operates.
• Global context encompasses all variables, functions, and objects that are accessible throughout an entire program.

• It can be thought of as the 'big picture' view of a program's execution.

• In web development, global context includes the window object in JavaScript.
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Q7. What is temporal deadzone
Ans. 
Temporal dead zone is a period during the variable creation process where accessing the variable results in a ReferenceError.
• Occurs when trying to access a variable before it has been declared with let or const

• Happens due to the variable being in the temporal dead zone until it is declared

• Example: accessing a variable before its declaration will result in a ReferenceError
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Q8. What is modules? types of modules in nodejs
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Modules in Node.js are reusable blocks of code that encapsulate related functionality.
• Modules in Node.js can be built-in modules like fs (file system) or third-party modules like express.

• Modules help in organizing code into separate files for better maintainability and reusability.

• Modules can be imported using the require() function in Node.js.
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Q9. Index in mongodb, why we need index, is index good or bad?
Ans. 
Indexes in MongoDB improve query performance by allowing the database to quickly locate and retrieve specific documents.
• Indexes help to speed up query performance by allowing the database to quickly locate specific documents based on the indexed fields.

• Without indexes, MongoDB would have to perform a collection scan, which can be slow and resource-intensive.

• Indexes can be created on single fields or compound fields to ...read more
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Q10. What are hooks , use of useRef
Ans. 
Hooks are a feature in React that allow you to use state and other React features in functional components. useRef is a hook that allows you to create a mutable object that persists for the lifetime of the component.
• Hooks are used to add state and lifecycle methods to functional components in React

• useRef is used to create a mutable reference that persists between renders

• useRef can be used to access DOM elements directl
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Q11. Fs module, http module, worker thread?
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Q12. Why we use mongoose not mongodb driver?
Ans. 
Mongoose is an Object Data Modeling (ODM) library for MongoDB that provides a higher level of abstraction and simplifies interactions with the database.
• Mongoose provides schema validation which helps maintain data integrity.

• Mongoose simplifies querying and data manipulation with built-in functions.

• Mongoose supports middleware functions for pre and post processing of data operations.
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Q1. ACID Properties
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ACID properties are a set of properties that guarantee reliable and consistent transactions in a database system.
• Atomicity ensures that either all operations in a transaction are completed successfully or none at all.

• Consistency ensures that the database remains in a valid state before and after the transaction.

• Isolation ensures that the concurrent execution of transactions results in a system state that would be obtai...read more
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Q2. What are Idempotent HTTP Requests?
Ans. 
Idempotent HTTP requests are requests that can be repeated multiple times without changing the result beyond the initial request.
• Idempotent requests have the same outcome no matter how many times they are executed.

• GET, PUT, and DELETE HTTP methods are typically idempotent.

• POST requests are not idempotent as they can create new resources with each execution.
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Q3. Questions regarding your project, and how did you learn from the projects and tasks assigned to you?
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Q4. System Design
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Q1. Introduction yourself in details covering each points
Ans. 
Experienced cluster manager with a proven track record in team leadership and strategic planning.
• Over 5 years of experience in managing multiple teams and projects simultaneously

• Strong leadership skills with the ability to motivate and inspire team members

• Expertise in strategic planning and execution to achieve organizational goals

• Excellent communication and interpersonal skills for effective team collaboration

• Proven t...read more
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Q2. Location can be for new hotels for max revenue
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Q1. Tell me about yourself
Ans. 
Experienced Senior Product Manager with a background in tech industry and a passion for driving product innovation.
• Over 8 years of experience in product management roles

• Strong background in the tech industry, with a focus on software development

• Proven track record of successfully launching and managing products from concept to market

• Passionate about driving product innovation and improving user experiences

• Skilled in cr...read more
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Q2. Aptitude Question
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Q1. Experience Questions
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Q2. Hobbies and Passion
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Q1. Assignment Round with Review at the end
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Q2. Pitch GoComet to the founder
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Mostly questions on logical aptitude

Q1. DSA questions. Reverse word of string, bubble sort, swap two variables without use of third variable
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Q2. OOPs concepts also some questions on project
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Q3. 1 puzzle (refer gfg)
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Q1. Why do you want to work at our company?
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Q2. What was the toughest challenge you have ever faced?
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