Tech Mahindra Technical Lead Interview Questions, Process, and Tips

REST API is a web service that uses HTTP methods to interact with resources. GET, PUT, POST, DELETE, MERGE, PATCH are different methods.

• REST API is a stateless architecture that uses HTTP methods to interact with resources.

• GET method is used to retrieve data from a server.

• PUT method is used to update an existing resource on the server.

• POST method is used to create a new resource on the server.

• DELETE method is used to d...read more

Caching can speed up request response. Popular caches include Redis, Memcached, and browser caching.

• Caching stores frequently accessed data in memory for faster retrieval

• Browser caching stores static assets like images and CSS files

• Redis and Memcached are popular in-memory caching solutions for web applications

• Cache invalidation is important to ensure data consistency

JWT token is used to secure endpoints in REST APIs by providing authentication and authorization.

• JWT stands for JSON Web Token

• It is a compact, URL-safe means of representing claims to be transferred between two parties

• It is used for authentication and authorization

• It contains three parts: header, payload, and signature

• The header contains the algorithm used to sign the token

• The payload contains the claims or information...read more

Angular code to fetch and display JSON response in tabular format.

• Use HttpClient module to make an HTTP GET request to the given URL.

• Subscribe to the response and extract the JSON data.

• Create an Angular component to display the data in a tabular format using HTML and CSS.

Sort an array of strings based on frequency of occurrence

• Create a map to store the frequency of each string in the array

• Sort the array based on the frequency stored in the map

• Handle cases where multiple strings have the same frequency by sorting them alphabetically