NxtWave Software Engineer Interview Questions and Answers

Use a user table with a column for user type (free, gold, platinum)

• Create a user table with columns for user ID, name, email, user type

• Use a separate table for user types with columns for type ID and type name

• Establish a one-to-many relationship between user and user type tables

• Example: user table - user_id, name, email, type_id; user_type table - type_id, type_name

High-level design for a live rank dashboard for a live test with millions of users.

• Use a scalable architecture to handle millions of users concurrently.

• Implement real-time data processing to update ranks dynamically.

• Utilize caching mechanisms to improve performance and reduce load on the database.

• Design a user-friendly interface with intuitive data visualization.

• Include features for filtering, sorting, and searching to

Angular pipes are used in Angular applications to transform data before displaying it in the view.

• Angular pipes are used to format data in the template.

• They can be used to transform data such as currency, dates, and text.

• Pipes can be chained together for more complex transformations.

• Custom pipes can also be created for specific formatting needs.

Routing is the process of selecting a path for network traffic to travel from one point to another.

• Routing involves determining the best path for data packets to travel through a network.

• Routers use routing tables to make decisions on how to forward packets.

• Routing protocols like OSPF and BGP help routers communicate and update routing information.

• Examples of routing include IP routing in the internet and routing withi

Auth guard is a feature in software development that restricts access to certain resources based on user authentication.

• Auth guard is commonly used in web applications to control access to certain pages or features.

• It checks if a user is authenticated before allowing them to access a specific resource.

• Examples include restricting access to admin pages or requiring login to view certain content.

An interceptor is a middleware component that intercepts incoming requests and outgoing responses in a web application.

• Interceptors can be used for logging, authentication, authorization, error handling, and more

• In Angular, interceptors can be used to modify HTTP requests before they are sent to the server or responses before they are returned to the calling code

React is a JavaScript library for building user interfaces. It is different from Angular in various ways.

• React is a library while Angular is a framework

• React uses virtual DOM while Angular uses real DOM

• React is more flexible and easier to learn than Angular

• Deep copy creates a new object with the same values while shallow copy creates a new reference to the same object

• Hoisting is a JavaScript mechanism where variables a...read more

Implement custom hooks and array flat method

• Custom hooks are reusable functions that allow you to extract component logic into reusable functions

• Array flat method is used to flatten an array of nested arrays into a single array

• To implement custom hooks, create a function that uses the useState and useEffect hooks

• To implement array flat method, use the reduce method to flatten the array