Palo Alto Networks DevOps Site Reliability Engineer Interview Questions, Process, and Tips

HAProxy is a free, open-source load balancer and proxy server software.

• HAProxy stands for High Availability Proxy.

• It is used to distribute traffic across multiple servers to ensure high availability and scalability.

• It supports TCP and HTTP-based applications.

• It can perform SSL/TLS termination, content switching, and request routing.

• It is highly configurable and can be used in various deployment scenarios.

• Examples of co...read more

REST API is a web-based API that uses HTTP requests to access and manipulate data.

• REST stands for Representational State Transfer

• It is an architectural style for building web services

• It uses HTTP methods like GET, POST, PUT, DELETE to perform operations on resources

• Responses are usually in JSON or XML format

• Examples include Twitter API, Facebook API, and Google Maps API

TCP for reliable data transfer, UDP for low latency and loss tolerance

• TCP is used when reliable data transfer is required, such as in file transfers or email communication

• UDP is used when low latency and loss tolerance are more important than reliability, such as in online gaming or video streaming

• TCP is connection-oriented while UDP is connectionless

• TCP provides flow control and congestion control while UDP does not

• TC...read more

SHA is a cryptographic hash function used for data integrity and security.

• SHA stands for Secure Hash Algorithm

• It generates a fixed-length hash value from input data

• Used for data integrity, digital signatures, and password storage

• Examples include SHA-1, SHA-256, SHA-512