Q1. What is the difference between authentication and authorization?
Authentication (authn) establishes who the caller is: verifying a password, a session cookie, a token or a certificate. Authorization (authz) decides what that identified...
Technical Question Bank · Peer-Reviewed
Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (8 available).
Active:
Tag: authentication ×
Q2. Session-based versus token-based authentication: what are the trade-offs?
Session-based authentication stores session state on the server and gives the client an opaque session identifier in a cookie. It is easy to revoke (delete the session), ...
Q3. What is the difference between HTTP 401 and 403?
401 Unauthorized means the request lacks valid authentication credentials. The client should authenticate and retry, and the response should include a `WWW-Authenticate` ...
Q4. How do you handle authentication in Next.js with the Pages Router?
By using libraries like `next-auth` or implementing custom authentication logic in API routes. ```jsx // pages/api/auth/[...nextauth].js import NextAuth from "next-auth";...
Q5. How do you implement authentication in Next.js?
Authentication in Next.js applications is typically implemented using one of three industry-standard architectural patterns: ### 1. NextAuth.js / Auth.js (Industry Standa...
Q6. How to add authjs in Next.js app router?
To add authjs in nextjs app router, you can use the `next-auth` package. First, install it: ```bash npm install next-auth ``` Then, create a file named `[...nextauth].js`...
Q7. How do you handle authentication tokens in Next.js?
By using cookies or local storage to store authentication tokens. ```js // Example of setting a token in a cookie import Cookies from "js-cookie"; function setToken(token...
Q8. Explain the concept of authorization in middleware & routes in Next.js.
Authorization in middleware and routes in Next.js involves checking if a user has the necessary permissions to access a specific route or perform an action. This can be d...