Raw Engineering Interview Questions and Answers

This program identifies and lists all prime numbers up to a specified limit using a simple algorithm.

• A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers.

• To find prime numbers, iterate through numbers starting from 2 up to a given limit.

• For each number, check if it is divisible by any number less than itself (except 1).

• If a number is not divisible by an...read more

Async code in JavaScript allows non-blocking execution, improving performance and responsiveness.

• Async code uses callbacks, promises, or async/await to handle asynchronous operations.

• Callbacks are functions passed as arguments to another function, to be executed once the async operation is complete.

• Promises represent the eventual completion or failure of an asynchronous operation, allowing chaining of multiple asy...read more

let, const, and var are JavaScript keywords for variable declaration with different scopes and mutability rules.

• var: Function-scoped or globally-scoped, can be redeclared and updated.

• Example: var x = 10; x = 20; var x = 30; // Valid

• let: Block-scoped, can be updated but not redeclared in the same scope.

• Example: let y = 10; y = 20; // Valid, let y = 30; // Error

• const: Block-scoped, cannot be updated or redeclared, m...read more

A promise is an object representing the eventual completion or failure of an asynchronous operation.

• Promises have three states: pending, fulfilled, and rejected.

• They allow for cleaner asynchronous code compared to callbacks.

• Example: A promise can be created using 'new Promise((resolve, reject) => { ... })'.

• You can handle results with '.then()' for success and '.catch()' for errors.

• Example: fetch('url').then(res...read more

In case of a server outage, I would quickly assess the situation, communicate with the team, and implement recovery procedures.

• Assess the situation: Check monitoring tools for alerts and logs to identify the cause of the outage.

• Communicate: Inform the team and stakeholders about the issue and expected downtime.

• Implement recovery: Restart the server or services if it's a minor issue, or escalate to the engineering ...read more

Yes, I am willing to work on 24x7 support requirements.

• I understand the importance of providing round-the-clock support to ensure system availability and minimize downtime.

• I am comfortable with working in shifts and being on-call to address any issues that may arise.

• I have experience in incident management and troubleshooting, which are crucial skills for handling support requirements.

• I am familiar with tools and ...read more

Faced performance issues in a React Native app due to heavy image loading; optimized it using caching and lazy loading techniques.

• Identified performance bottlenecks using React Native's built-in performance monitor.

• Implemented image caching using libraries like 'react-native-fast-image' to reduce load times.

• Utilized lazy loading for images in lists to only load them when they come into view, improving initial rend...read more

MVVM is a design pattern used in software development to separate the user interface from the business logic.

• MVVM stands for Model-View-ViewModel

• Model represents the data and business logic

• View represents the user interface

• ViewModel acts as an intermediary between the Model and View

• MVVM helps in achieving separation of concerns and easier unit testing

• Popular in frameworks like Angular and Vue.js