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Delhi Metro Rail Corporation Interview Questions and Answers
Q1. What is rsync in linux?
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
Q2. What is load balancing
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
Q3. Difference in udp and tcp
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
Q4. 10 linux commands
Common Linux commands for system administrators
ls - list directory contents
cd - change directory
pwd - print working directory
cp - copy files and directories
mv - move or rename files and directories
rm - remove files or directories
grep - search text patterns
chmod - change file permissions
ps - display information about running processes
top - display and update sorted information about processes
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