Mastering Parajumbles: Tips, Tricks, and Examples for Competitive Exams

If you’re preparing for exams or looking to enhance your understanding of data transmission, networking, and communication protocols, you’re in the right place. This post covers essential concepts of Data Communication, making it easier for you to learn, test, and improve your knowledge.

What is Data Communication?

Data Communication is the process of transmitting digital or analog data between devices over a transmission medium, such as cables, fiber optics, or radio waves. It plays a critical role in how information is shared in systems like the Internet, telecommunications, and networking.

Component	Description
Sender	The device that generates and sends data.
Receiver	The device that receives and interprets the data.
Transmission Medium	The physical or logical path through which data travels.
Protocol	Rules that define how data is transmitted and received.

Key Topics in Data Communication

Topic	Description
Data Transmission	Involves serial vs. parallel and duplexing (half/full-duplex).
Transmission Media	Types: twisted pair cables, coaxial cables, fiber optics, wireless.
Modulation Techniques	Conversion of digital data to analog signals, such as AM, FM, and PM.
Error Detection & Correction	Methods like Parity Bit, CRC, and Hamming Codes for data integrity.
Network Protocols	Common protocols like TCP/IP, HTTP, FTP, SMTP.
Data Compression	Techniques such as Huffman Coding to reduce data size for efficient transmission.
Network Topologies	Configurations like star, mesh, bus, and ring.

Data Communication MCQs to Practice

Here, we’ve curated a set of MCQs on Data Communication that cover a variety of topics. Use them to test your skills and gauge your readiness for exams.

Practice Show All Answers

Q1: Users often use ________ for access to a mainframe or supercomputer.

A. terminal

B. node

C. desktop

D. hand held

E. none of these

A terminal is a device that allows users to interact with a mainframe or supercomputer. It provides a way to input commands and display output from the computer. This is particularly useful in environments where multiple users need to access a centralized computing resource.

Q2: To create a ________ personal computers can connect together.

A. server

B. mainframe

C. network

D. supercomputer

E. none of these

A network is a group of interconnected computers that can communicate and share resources with each other. Personal computers can be connected to form a local area network (LAN) or a wide area network (WAN), enabling file sharing, printer sharing, and other collaborative tasks.

Q3: A combination of hardware and software, which provides facilities of sending and receiving of information between computer devices.

A. Network

B. Peripheral

C. Expansion slot

D. Digital device

E. None of these

A network is a combination of hardware and software that allows multiple computer devices to communicate and share information. This includes components like routers, switches, and network interface cards (NICs), along with software protocols that manage data transmission.

Q4: Server is a computer which provides resources other computers connected in a ________

A. network

B. mainframe

C. supercomputer

D. clients

E. None of these

A server is a centralized computer that manages and provides resources to other computers within a network. These resources can include data storage, processing power, and applications. Clients are the computers that request and utilize these resources.

Q5: A device that connects to a network without the use of cables is said to be ________

A. distributed

B. wireless

C. centralized

D. open source

E. None of these

Wireless devices connect to a network using radio waves or infrared signals instead of physical cables. This allows for greater mobility and flexibility, as users can access the network from various locations without being tethered to a specific point.

Q6: Several computers linked to a server to share programs and storage space.

A. Network

B. Grouping

C. Library

D. Integrated system

E. None of these

A network of computers linked to a server allows for shared access to programs, storage, and other resources. This setup is common in organizations where multiple users need to collaborate and share information efficiently.

Q7: Computers connected to a LAN (local area network) can ________

A. run faster

B. go online

C. share information and/or share peripheral equipment

D. e-mail

E. None of these

A local area network (LAN) allows computers within a limited geographical area to share information and peripheral equipment such as printers and scanners. This facilitates collaboration and resource sharing among users.

Q8: What type of resource is most likely to be a shared common resource in a computer network?

A. Keyboards

B. Speakers

C. Floppy disk drives

D. Printers

E. None of these

Printers are commonly shared resources in a computer network. By sharing a printer, multiple users can send print jobs to a single device, reducing the need for individual printers for each computer and saving costs.

Q9: The ________ enables your computer to connect to other computers.

A. Video card

B. Sound card

C. Network interface card (NIC)

D. Controller card

E. None of these

A Network Interface Card (NIC) is a hardware component that allows a computer to connect to a network. It provides the necessary interface for sending and receiving data over the network.

Q10: A(n) ________ is a small group of computers and peripherals linked together in a small geographic area.

A. MAN

B. PAN

C. CAN

D. LAN

E. None of these

A Local Area Network (LAN) is a small network that connects computers and peripherals within a limited geographical area, such as a single building or a group of buildings. LANs are commonly used in offices, schools, and homes to facilitate communication and resource sharing.

Q11: To access a mainframe or supercomputer, users often use a ________

A. terminal

B. node

C. desktop

D. hand held

E. None of these

A terminal is a device that allows users to interact with a mainframe or supercomputer. It provides a way to input commands and display output from the computer. This is particularly useful in environments where multiple users need to access a centralized computing resource.

Q12: A word in a web page that, when clicked, opens another document.

A. Anchor

B. Hyperlink

C. Reference

D. URL

E. None of these

A hyperlink is a clickable word or phrase in a web page that directs the user to another document or section of the same document. Hyperlinks are fundamental to the navigation of the World Wide Web.

Q13: Dumb terminals have terminals and ________

A. mouse

B. speakers

C. keyboard

D. mouse or speakers

E. None of these

Dumb terminals are simple input/output devices that consist of a keyboard and a display screen. They do not have processing capabilities and rely on a mainframe or server for computation. These terminals are used primarily for data entry and display.

Q14: A ________ typically connects personal computers within very limited geographical area, usually within a single building.

A. LAN

B. BAN

C. TAN

D. NAN

E. None of these

A Local Area Network (LAN) connects computers and peripherals within a limited geographical area, such as a single building or a group of buildings. LANs are commonly used in offices, schools, and homes to facilitate communication and resource sharing.

Q15: Computers connected to a LAN can ________

A. run faster

B. share information and/or share peripheral equipment

C. e-mail

D. go online

E. None of these

A Local Area Network (LAN) allows computers within a limited geographical area to share information and peripheral equipment such as printers and scanners. This facilitates collaboration and resource sharing among users.

Q16: Optical fibre works on which of the following principle of light?

A. Reflection

B. Refraction

C. Diffraction

D. Total internal reflection

E. None of these

Optical fibers work on the principle of total internal reflection. This phenomenon occurs when light travels from a denser medium to a rarer medium and is reflected back into the denser medium, allowing light to travel through the fiber with minimal loss.

Q17: Which of the following refers to a small, single-site network?

A. LAN

B. DSL

C. RAM

D. USB

E. CPU

A Local Area Network (LAN) is a small, single-site network that connects computers and peripherals within a limited geographical area, such as a single building or a group of buildings. LANs are commonly used in offices, schools, and homes to facilitate communication and resource sharing.

Q18: What type of resource is most likely to be a shared common resource in a computer network?

A. printers

B. speakers

C. floppy disk drives

D. keyboards

E. None of these

Printers are commonly shared resources in a computer network. By sharing a printer, multiple users can send print jobs to a single device, reducing the need for individual printers for each computer and saving costs.

Q19: A(n) ________ is a combination of hardware and software that facilitates the sharing of information between computing devices.

A. network

B. peripheral

C. expansion board

D. digital device

E. None of these

A network is a combination of hardware and software that allows multiple computer devices to communicate and share information. This includes components like routers, switches, and network interface cards (NICs), along with software protocols that manage data transmission.

Q20: Terminal is ________

A. a device to give power supply to the computer

B. a point at which data enters or leaves the computer

C. the last instruction in a program

D. any input/output device

E. None of these

A terminal is a point at which data enters or leaves a computer. It serves as an interface for users to input commands and receive output from the computer. Terminals can be dumb terminals, which rely on a mainframe for processing, or intelligent terminals, which have some processing capabilities.

Q21: A device that connects to a network without the use of cables is said to be ________

A. distributed

B. wireless

C. centralized

D. open source

E. scattered

Wireless devices connect to a network using radio waves or infrared signals instead of physical cables. This allows for greater mobility and flexibility, as users can access the network from various locations without being tethered to a specific point.

Q22: A computer ________ consists of two or more computers and other devices that are connected for the purposes of sharing data and programs.

A. network

B. system

C. workstation

D. device

E. None of these

A computer network consists of two or more computers and other devices that are connected to share data and programs. This setup allows for collaboration, resource sharing, and efficient communication among users.

Q23: Which of the following is a type of network topology?

A. Bus

B. Star

C. Ring

D. Mesh

E. None of these

Network topology refers to the arrangement of the elements of a communication network. Mesh topology is a type where each device is connected to every other device in the network, providing multiple paths for data transmission and enhancing redundancy.

Q24: What is the primary function of a router in a network?

A. To connect peripheral devices

B. To provide processing power

C. To direct data packets between networks

D. To store data

E. None of these

A router is a networking device that directs data packets between computer networks. It determines the best path for data transmission based on the network's topology and current traffic, ensuring efficient and reliable communication.

Q25: Which protocol is used for email communication?

A. HTTP

B. FTP

C. SMTP

D. TCP

E. None of these

Simple Mail Transfer Protocol (SMTP) is used for sending and receiving emails over the internet. It defines the rules for email transmission between servers and clients, ensuring that messages are delivered accurately and efficiently.

Q26: What does the term 'bandwidth' refer to in data communication?

A. The speed at which data is transmitted

B. The amount of data that can be stored

C. The number of devices connected to a network

D. The type of network topology

E. None of these

Bandwidth refers to the maximum rate of data transfer across a given path. It is typically measured in bits per second (bps) and determines the speed and capacity of a network to transmit data.

Q27: Which of the following is a wireless networking standard?

A. Ethernet

B. Wi-Fi

C. Bluetooth

D. Both B and C

E. None of these

Wi-Fi and Bluetooth are both wireless networking standards. Wi-Fi is used for high-speed internet and network connections over a larger area, while Bluetooth is used for short-range communication between devices.

Q28: What is the purpose of a firewall in a network?

A. To increase network speed

B. To provide additional storage

C. To protect the network from unauthorized access

D. To manage network topology

E. None of these

A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and untrusted external networks, such as the Internet, to protect against unauthorized access and cyber threats.

Q29: Which of the following is a type of network switch?

A. Hub

B. Modem

C. Router

D. Managed switch

E. None of these

A managed switch is a type of network switch that provides advanced features for managing and configuring the network. It allows for better control over network traffic, enhanced security, and improved performance compared to unmanaged switches.

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Correct Answers: 0

Wrong Answers: 0

Keep Practicing!

Data Communication is important for jobs in computers, IT, networking, and telecommunications as well as Government Jobs like SSC CGL, Railways etc. Practicing Data Communication MCQs helps you learn about data transmission, network protocols, and other key concepts. This will help you do well in exams and your career.

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