TransFunnel Consulting Data Engineer Interview Questions and Answers

Easy and moderate level question

Given a relevant topic and discussion on it

Q1. Introducd yourself
Add your answer
Q2. Why do you want to join us
Add your answer

Q1. Palindrome code should design
Ans. 
Palindrome code should be designed to check if a given string is the same forwards and backwards.
• Create a function that takes a string as input

• Remove any spaces and punctuation from the string

• Reverse the string and compare it to the original string to check if it is a palindrome
Answered by AI
Add your answer
Q2. Regarding sql topics like joins and acid
Add your answer
Q3. Project explain and domain
Add your answer
Q4. Project explain and domain and internal working
Add your answer
Q5. Oops concepts and coding
Add your answer

Q1. Rate yourself in js, node js, react, MongoDB (separately)
Add your answer
Q2. Typeof null, typeof undefined, typeof {}, typeof NaN
Add your answer
Q3. What changes came in es6
Ans. 
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
Answered by AI
Add your answer
Q4. This keyword, closures, hoisting
Add your answer
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.
Answered by AI
Add your answer
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.
Answered by AI
Add your answer
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
Answered by AI
Add your answer
Q8. What is modules? types of modules in nodejs
Ans. 
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.
Answered by AI
Add your answer
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
Answered by AI
Add your answer
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
Answered by AI
Add your answer
Q11. Fs module, http module, worker thread?
Add your answer
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.
Answered by AI
Add your answer

Q1. Diff btw vite and webpack
Add your answer
Q2. What is currying in js
Add your answer

Q1. What is currying in javascript?
Add your answer
Q2. Diff btw webpack and vite
Add your answer

Q1. Difference between function and method
Add your answer
Q2. A program related to strings
Add your answer
Q3. A program related to prime numbers
Add your answer

The aptitude test was relatively straightforward, consisting of both aptitude and technical questions, with a difficulty level ranging from easy to medium.

Q1. Was asked to write a code on basic DSA concept
Add your answer
Q2. Then was asked basic questions on DSA and SQL
Add your answer

Q1. What is single page application
Ans. 
Single page application is a web application that loads a single HTML page and dynamically updates the content as the user interacts with the app.
• SPA uses AJAX and HTML5 to create fluid and responsive user experience.

• It eliminates the need for page reloading during use, making it faster and more efficient.

• Examples include Gmail, Facebook, and Google Maps.
Answered by AI
Add your answer
Q2. What is state management
Ans. 
State management is the process of managing the state of an application, including data flow, user interface updates, and user interactions.
• State management involves storing and updating the state of an application to ensure data consistency.

• It helps in managing user interface updates based on changes in the application state.

• State management is crucial for handling user interactions and maintaining a seamless user exp...read more
Answered by AI
Add your answer

Q1. What is jdk, string related questions, basic java oops questions?
Add your answer

The aptitude test was of moderate level.

It checked on the concepts of oops

Q1. How will you deal with tight delivery time.
Ans. 
I will prioritize tasks, communicate effectively with team members, and utilize time management techniques to meet deadlines.
• Prioritize tasks based on importance and urgency

• Break down tasks into smaller manageable chunks

• Communicate effectively with team members to coordinate efforts

• Utilize time management techniques such as Pomodoro technique or Agile methodologies

• Identify and eliminate any potential roadblocks or bott...read more
Answered by AI
Add your answer