GS Lab Senior Software Engineer Interview Questions and Answers

Implement find function for a string in C++.

• Use the find() function from the string class in C++ to search for a substring within a string.

• The find() function returns the position of the first occurrence of the substring, or string::npos if not found.

• Example: string str = 'hello world'; int pos = str.find('world');

I have extensive experience with the MERN stack, focusing on building scalable web applications and RESTful APIs.

• Proficient in MongoDB for database management, utilizing its document-oriented structure for flexibility.

• Experienced with Express.js for building robust server-side applications and APIs.

• Skilled in React.js for creating dynamic user interfaces, leveraging hooks and state management.

• Utilized Node.js for ...read more

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 cu...read more

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.

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 dev...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