DXC Technology Computer Hardware & Networking Engineer Interview Questions and Answers

WAN (Wide Area Network) and LAN (Local Area Network) are two types of networks that work together to connect devices over different geographical areas.

• WAN covers large geographical areas, connecting multiple LANs together.

• LAN is limited to a small area, like a single building or campus.

• WAN uses public infrastructure like telephone lines, fiber optics, or satellite links.

• LAN typically uses Ethernet cables or Wi-Fi for c...read more

150 computers can connect simultaneously through a network switch or router.

• Use a network switch or router to connect all 150 computers simultaneously.

• Ensure that the network infrastructure can handle the bandwidth and traffic of 150 computers.

• Set up the network with proper IP addressing and subnetting to avoid conflicts.

• Consider using VLANs to segregate traffic and improve network performance.

• Implement security measur...read more

Protocol is a set of rules used in digital communication to connect network devices and exchange information.

• Protocols define the format, timing, sequencing, and error checking of data transmission.

• Examples of protocols include TCP/IP, HTTP, FTP, and SMTP.

• Protocols ensure that devices can communicate effectively and understand each other's data.

• Different protocols serve different purposes, such as routing data, sending

A gateway is a hardware device that connects two dissimilar types of networks, allowing data to be sent and received through the internet even if it is a LAN network.

• Gateway acts as an entry and exit point for data traffic between networks

• It translates data between different network protocols

• Examples include routers and firewalls that connect a local network to the internet

An operating system is system software that serves as an interface between users and computer hardware.

• Operating system is responsible for managing computer resources and providing a platform for running applications.

• It controls and coordinates the hardware and software components of a computer system.

• Examples of operating systems include Windows, macOS, Linux, and Android.

• Operating systems provide services such as fil...read more

There are six commonly known types of servers: Web, Application, Database, Mail, FTP, and DNS servers.

• Web servers handle HTTP requests and deliver web pages to clients.

• Application servers provide a platform for running applications and managing resources.

• Database servers store and manage databases, allowing access and retrieval of data.

• Mail servers handle email communication, including sending, receiving, and storing m...read more

A gateway is a hardware device that connects two dissimilar types of networks, allowing data to be sent and received between them.

• Gateway acts as an entry and exit point for data traffic between networks

• It translates data from one format to another to enable communication between networks

• Examples include routers, switches, and firewalls that serve as gateways between LAN and WAN networks

BigInteger is used for mathematical operations involving very large integers in Java.

• BigInteger is used when the range of values supported by primitive data types like int and long is not sufficient.

• It is commonly used in cryptography and security applications.

• It provides methods for arithmetic, bitwise, and logical operations on large integers.

• Example: calculating factorial of a large number, generating large prime nu

Merge Sort Algo code in java

• Divide the array into two halves

• Recursively sort the two halves

• Merge the sorted halves

• Time complexity: O(n log n)