Chapter Exam

Chapter 11: Data Communication — Online MCQ Test

Q: Which term refers to the physical or logical arrangement of computers and other devices in a network?

Answer: B. Network topology — Network topology describes how devices are arranged and connected in a network.

Q: In a star topology, all nodes are connected to a central device such as a ________.

Answer: B. Hub or switch — In star topology, each node is directly connected to a central hub or switch.

Q: In a star topology, what happens if the central hub or switch fails?

Answer: B. The entire network may stop working — Since all nodes depend on the central device in star topology, failure of that device can bring down the whole network.

Q: In a star topology, if the cable connecting one computer to the central switch breaks, what is the most likely effect?

Answer: A. Only that computer gets disconnected — In star topology, each node has an independent link to the central device, so a single link failure usually affects only that node.

COMPUTER SCIENCE · CLASS 12 SECOND PUC · Karnataka State Board

Practice Chapter 11: Data Communication with a free chapter-wise online MCQ test for Karnataka State Board CLASS 12 SECOND PUC COMPUTER SCIENCE. This chapter covers: network topologies - star topology - bus topology - tree topology - transmission media - twisted pair - optical fiber - radio waves - hubs - switches - routers - gateways. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 11: Data Communication — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 12 SECOND PUC COMPUTER SCIENCE — Chapter 11: Data Communication, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which term refers to the physical or logical arrangement of computers and other devices in a network?

A. Network protocol
B. Network topology ✓
C. Transmission medium
D. Network address

Answer: B. Network topology
Network topology describes how devices are arranged and connected in a network.

In a star topology, all nodes are connected to a central device such as a ________.

A. Terminator
B. Hub or switch ✓
C. Printer
D. Modem only

Answer: B. Hub or switch
In star topology, each node is directly connected to a central hub or switch.

In a star topology, what happens if the central hub or switch fails?

A. Only one computer is affected
B. The entire network may stop working ✓
C. The network automatically becomes a bus topology
D. Data transmission becomes faster

Answer: B. The entire network may stop working
Since all nodes depend on the central device in star topology, failure of that device can bring down the whole network.

In a star topology, if the cable connecting one computer to the central switch breaks, what is the most likely effect?

A. Only that computer gets disconnected ✓
B. All computers stop communicating
C. The network becomes a bus topology
D. The switch becomes a router

Answer: A. Only that computer gets disconnected
In star topology, each node has an independent link to the central device, so a single link failure usually affects only that node.

Which situation most clearly requires a gateway rather than only a router?

A. Connecting two devices in the same star LAN
B. Connecting two networks that use different communication protocols ✓
C. Connecting a computer to a switch using twisted pair cable
D. Broadcasting a signal from a hub to all connected computers

Answer: B. Connecting two networks that use different communication protocols
A gateway is required when communication involves dissimilar networks or different protocols, because it can perform protocol conversion.