Data Communication Test 03

Total Questions: 41

2 - Which is the most secure type of transmission medium?

A ) Twisted-wire pair
B ) Microwave
C ) Coaxial cable
D ) Fiber optic cable ✅

3 - Which of the following is the insulation on fibre optic cable?

A ) Sheathing
B ) Cladding ✅
C ) Braiding
D ) Housing

4 - A fiber optic cable's core is measured in:

A ) Inches
B ) Microns ✅
C ) Centimeters
D ) AWG

5 - The diameter of fiber optical cable is:

A ) 62.5 cm
B ) 62.5 microns ✅
C ) 62.5 m
D ) 62.5 mm

6 - Transmission from a satellite to its earth-based station is called:

A ) Uplink
B ) Downlink ✅
C ) Baselink
D ) Geolink

7 - Transmission from Earth to satellite is called:

A ) Uplink ✅
B ) Downlink
C ) Low link
D ) High link

10 - Which medium transmits voice and data via air as high-frequency radio waves?

A ) Twisted pair
B ) Coaxial cable
C ) Fiber optic cable
D ) Microwave ✅

11 - All of the following are guided communications media EXCEPT:

A ) Twisted pair
B ) Fiber optic cable
C ) Coaxial cable
D ) Satellite ✅

12 - Select guided media from the following:

A ) Twisted pair
B ) Fiber optic
C ) Satellite ✅
D ) Coaxial

13 - Which of the following consists of two insulated copper wires twisted together?

A ) Fiber optic
B ) Twisted pair wire ✅
C ) Submarine
D ) Coaxial cables

14 - Which communications medium requires line-of- sight?

A ) Microwave ✅
B ) Fiber optic
C ) Twisted pair
D ) Coaxial

15 - Modem stands for:

A ) Modification/ demodification
B ) Modulation/ demodulation ✅
C ) Modem/ Modeless
D ) Modeling/ Demonstration

16 - The transmission rate of modem can be measured in:

A ) Bits per second ✅
B ) Bytes per second
C ) Characters per second
D ) Words per second

18 - The process of converting digital signal to an analog signal is called:

A ) Modulation ✅
B ) Demodulation
C ) Conversion
D ) Merging

20 - An advantage of synchronous over asynchronous transmission is:

A ) Simplecity
B ) Speed ✅
C ) Error checking
D ) Two-way

21 - Which of the following features is a provided with a modem?

A ) Speeds
B ) Self-testing
C ) Transmission rate
D ) All

22 - Bps is short for:

A ) Baud per second
B ) Bytes per second ✅
C ) Bits per second
D ) Binary packets are second

26 - Digital signals are commonly known as:

A ) Broadband
B ) Baseband ✅
C ) Narrow band
D ) Band

28 - The number of frequencies that can fit on a link at one time is called:

A ) Bandwidth ✅
B ) Modulation
C ) Demodulation
D ) Codec

29 - BCD stands for the:

A ) Binary coded decimal ✅
B ) Base coded decimal
C ) Byte coded decimal
D ) Bidirectional coded decimal

30 - IBM stands for:

A ) International Business Machine ✅
B ) Internet Business Machine
C ) Internet Bulletin machine
D ) International Binary Machine

31 - The computers in wide geographical area can be efficiently connected by:

A ) Twisted pair
B ) Coaxial cable
C ) Satellite ✅
D ) WiFi

33 - An important property of fibre optic cable is:

A ) Degradation
B ) Refraction ✅
C ) Radiation
D ) Noise

34 - Satellite transmission stations that can both send and receive message are called:

A ) Earth stations ✅
B ) Moon stations
C ) Mars stations
D ) Jupiter stations

36 - The process of converting analog to digital signal is known as:

A ) Demodulation ✅
B ) Modulation
C ) Data sequencing
D ) Merging

38 - A----- is used an automatic programmable machine.

A ) CAD
B ) CAM
C ) CBY
D ) Robot ✅

39 - The benefits of using computers are:

A ) Speed
B ) Reliable
C ) Storage
D ) All

40 - The process of performing automatic office tasks using computer is called:

A ) Office support
B ) Office automation ✅
C ) Data management
D ) Reprographic

41 - The process of producing multiple copies of a document is called:

A ) Reprographics ✅
B ) Word processing
C ) Spreadsheet
D ) Image processing