GS Lab Interview Questions, Process, and Tips

Hashtable is not thread-safe while ConcurrentHashmap is thread-safe.

• Hashtable is a legacy class while ConcurrentHashmap is a modern class.

• Hashtable uses synchronized methods while ConcurrentHashmap uses lock striping.

• ConcurrentHashmap allows multiple threads to read and write concurrently.

• Hashtable is slower than ConcurrentHashmap in multi-threaded environments.

Sorting is arranging data in a specific order based on a criteria, while ordering is arranging data in ascending or descending order.

• Sorting involves arranging data based on a specific criteria such as alphabetical order, numerical order, or date order.

• Ordering involves arranging data in either ascending or descending order based on a default criteria such as alphabetical order or numerical order.

• Sorting can be customi...read more

Prototypes and functionality of socket, bind, listen, accept & connect

• socket() - creates a new socket

• bind() - assigns a local address to a socket

• listen() - puts a socket in a passive mode

• accept() - accepts a connection on a socket

• connect() - initiates a connection on a socket

Handshaking mechanism in TCP communication is a process of establishing and terminating a connection between two devices.

• TCP uses a three-way handshake mechanism to establish a connection.

• The three steps involved in the handshake are SYN, SYN-ACK, and ACK.

• During the handshake, the devices exchange information about the initial sequence numbers, window sizes, and other parameters.

• The handshake ensures that both devices ...read more

TCP is a connection-oriented protocol while UDP is connectionless. TCP is used for reliable data transfer while UDP is used for real-time applications.

• TCP provides reliable, ordered, and error-checked delivery of data while UDP does not guarantee any of these

• TCP is used for applications that require high reliability and transmission speed, such as email, file transfer, and web browsing

• UDP is used for real-time applicat...read more