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DDC23-24_Semi-Final Quiz

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.

Which of the following is true about digital signals?

a)

Continuous wave form

b)

Represented by continuous electromagnetic waves

c)

Discrete in nature

d)

Represent sequence of voltage pulses

2.

What is the term used for random disturbance or fluctuation in analog or digital signal?

a)

Attenuation

b)

Dispersion

c)

Noise

d)

Impulse

3.

Which type of cable is made of two plastic insulated copper wires twisted together to form a single media?

a)

Power Lines

b)

Coaxial Cable

c)

Fiber Optics

d)

Twisted Pair Cable

4.

What is the technique to mix and send multiple data streams over a single medium called?

a)

Channel Capacity

b)

Multiplexing

c)

Switching

d)

Transmission Impairment

5.

Which of the following is a type of guided media?

a)

Fiber Optics

b)

Wireless

c)

Power Lines

d)

Coaxial Cable

6.

What is the process for converting digital data into digital signal called?

a)

Transmission Impairment

b)

Switching

c)

Multiplexing

d)

Line Coding

7.

Which type of modulation alters the phase to reflect the change in voltage of analog data signal?

a)

Phase Modulation

b)

Frequency Modulation

c)

Quadrature Phase Shift Keying

d)

Amplitude Modulation

8.

What is the Layer-1 technology that uses power cables to transmit data signals?

a)

Fiber Optics

b)

Coaxial Cable

c)

Power Line Communication

d)

Twisted Pair Cable

9.

Which type of transmission mode requires only one communication channel?

a)

Asynchronous Serial Transmission

b)

Parallel Transmission

c)

Serial Transmission

d)

Synchronous Serial Transmission

10.

What is the technique used to convert analog wave into digital data?

a)

Amplitude Shift Keying

b)

Frequency Shift Keying

c)

Phase Shift Keying

d)

Pulse Code Modulation

11.

Which type of encoding uses multiple voltage levels to represent binary values?

a)

Polar Encoding

b)

Bipolar Encoding

c)

Manchester

d)

Differential Manchester

12.

What is the property of light that has been used in fiber optic transmission?

a)

Refraction at 90 degree

b)

Travels in a straight line

c)

Penetrates through walls

d)

High frequency range

13.

Which type of transmission mode has no importance of timing?

a)

Synchronous Serial Transmission

b)

Serial Transmission

c)

Asynchronous Serial Transmission

d)

Parallel Transmission

14.

What is the process for converting analog data into digital form called?

a)

Sampling

b)

Quantization

c)

Analog-to-Digital Conversion

d)

Encoding

15.

Which type of modulation uses two frequencies to represent binary digits?

a)

Amplitude Shift Keying

b)

Frequency Shift Keying

c)

Phase Shift Keying

d)

Quadrature Phase Shift Keying

16.

Physical layer of the OSI model is also known as:

a)

Layer 2

b)

Layer 7

c)

Layer 3

d)

Layer 1

17.

What are sets of clearly defined rules, regulations, standards, and procedures that enable hardware and software developers to make devices and applications that function properly at a particular layer?

a)

Protocol

b)

TCP/IP

c)

Networks

d)

Interconnection

18.

What is the process of converting analog signals into digital form called?

a)

Amplitude Shift Keying

b)

Frequency Shift Keying

c)

Phase Shift Keying

d)

Analog-to-Digital Conversion

19.

Which type of modulation alters the frequency to reflect the change in voltage of analog data signal?

a)

Frequency Modulation

b)

Phase Modulation

c)

Quadrature Phase Shift Keying

d)

Amplitude Modulation

20.

What is the property of light that has been used in fiber optic transmission?

a)

Refraction at 90 degree

b)

Travels in a straight line

c)

Penetrates through walls

d)

High frequency range