Delhi Metro Rail Corporation Interview Questions and Answers

rsync is a command-line tool for syncing files and directories between two locations on a Unix-like system.

• rsync stands for remote sync.

• It can be used to copy files locally or between a local and remote system.

• rsync only transfers the differences between source and destination files, making it efficient for large transfers.

• It can preserve permissions, timestamps, and other file attributes during synchronization.

• Example: rsync -avz /path/to/source/ user@remote:/path/to/destina...read more

Load balancing is the process of distributing network traffic across multiple servers to ensure optimal resource utilization and prevent overload.

• Load balancing helps improve the performance, reliability, and scalability of applications by evenly distributing incoming traffic.

• It can be achieved through various methods such as round-robin, least connections, IP hash, and weighted round-robin.

• Examples of load balancing solutions include hardware load balancers like F5 Networks,...read more

UDP is connectionless and faster, while TCP is connection-oriented and reliable.

• UDP stands for User Datagram Protocol, while TCP stands for Transmission Control Protocol.

• UDP is connectionless, meaning it does not establish a connection before sending data, while TCP is connection-oriented and establishes a connection before data transfer.

• UDP is faster but less reliable as it does not guarantee delivery of packets, while TCP is slower but ensures reliable delivery through erro...read more