Bacancy Technology Interview Questions and Answers

Q1. Difference between async and promise
Ans. 
Async is a keyword used to define a function that returns a promise. Promises are objects representing the eventual completion or failure of an asynchronous operation.
• Async functions always return a promise, while promises represent the eventual result of an asynchronous operation.

• Async functions make it easier to write asynchronous code in a synchronous manner, using the 'await' keyword to pause execution until the pr...read more
Answered by AI
Add your answer
Q2. Difference between fetch and axios
Ans. 
Fetch is a built-in web API in JavaScript for making HTTP requests, while Axios is a third-party library for the same purpose.
• Fetch is built into the browser, while Axios is a standalone library that needs to be installed separately.

• Axios has built-in support for handling request and response interceptors, while Fetch does not.

• Axios automatically transforms JSON data, while with Fetch you need to manually call the .jso...read more
Answered by AI
Add your answer

Q1. Tell me about your self
Add your answer
Q2. Explain the roles and responsibilities.
Add your answer
Q3. Explain the testing process of current company
Add your answer

Q1. What are your strengths and weaknesses?
Add your answer
Q2. What are the reasons for choosing Bacancy as a workplace?
Add your answer

Explain the difference between volatile and const volatile in C

Q1. What is the difference between SPI and I2C Communication protocols?
Ans. 
SPI is faster, full-duplex, and uses separate data lines, while I2C is slower, half-duplex, and uses a shared data line.
• SPI is faster than I2C

• SPI is full-duplex, allowing data to be sent and received simultaneously

• SPI uses separate data lines for communication

• I2C is slower than SPI

• I2C is half-duplex, meaning data can only be sent or received at a time

• I2C uses a shared data line for communication
Answered by AI
Add your answer

Q1. What is directive, pipes, service, forms
Ans. 
Directives, pipes, services, and forms are core Angular concepts for building dynamic web applications.
• Directives: Custom HTML attributes that enhance the behavior of elements. Example: <div *ngIf='isVisible'>Content</div>

• Pipes: Transform data for display in templates. Example: {{ dateValue | date:'short' }} formats a date.

• Services: Singleton objects for business logic and data sharing. Example: @Injectable...read more
Answered by AI
Add your answer
Q2. Rxjs Operators, subject vs behaviour subject
Add your answer

Q1. Js promises async await closusre
Add your answer
Q2. Node js architecture event loop
Add your answer

Q1. What is JS?
Add your answer
Q2. What is Callback?
Add your answer