COS2626
EXAM PACK
, lOMoARcPSD|18222662
COS2626 Assessment 3
6. A company has two buildings approximately 300 meters apart. The
company wishes to transmit data between the two buildings on a routine
basis at speeds of up to 8 Gbps. Which wired LAN (Local Area Network)
technology from the list below can be applicable to this scenario?
A. Twisted pair Cat 8
B. Twisted pair Cat 7a
C. Coaxial cable
D. LED (Light-Emitting Diode) fiber optic
7. What is the frequency in Hertz of a signal that repeats 600 times within
one minute? What is its period?
A. 6 Hz; 6 seconds
B. 100 Hz; 10 seconds
C. 10 Hz; 0.1 seconds
D. 60 Hz; 0.010 seconds
8. The bandwidth for a data transmission line that can transmit within a
frequency range of 100 Hz to 3,500 Hz is .
A. 3,500 Hz
B. 3,400 Hz
C. 3,000 Hz
D. 3,600 Hz
9. A signal starts at point X. As it travels to point Y, it loses 8 dB. At point
Y, the signal is boosted by 10 dB. As the signal travels to point Z, it loses 7
dB. What is the dB strength of the signal at point Z?
A. -5 dB
B. -8 dB
C. -7 dB
D. -13 dB
, lOMoARcPSD|18222662
COS2626 Assessment 3
10. If a signal drops from 2000 watts to 1000 watts, there will be a ___dB
loss.
A. 3-
B. 20-
C. 50-
D. 1000-
11. What is the equivalent 4B/5B code of the bit string 1101 1010 0011
0001 1000 1001?
A. 00100 10110 10101 01001 10010 10011
B. 11011 10110 10101 01001 10010 01100
C. 11011 10110 10101 01001 01101 10011
D. 11011 10110 10101 01001 10010 10011
12. If quadrature amplitude modulation is used to transmit a signal with a
baud rate of 8000, what is the corresponding bit rate?
A. 16,000 bps (12 bits per baud)
B. 32,000 bps (4 bits per baud)
C. 12,000 bps (2 bits per baud)
D. 64,000 bps (16 bits per baud)
13. Which symbol is NOT part of the ASCII character set?
A. Á
B. @
C. 9
D. A
14. The ASCII (American Standard Code for Information Exchange) for the
message “Hello” would be .
A. Hello in ASCII: 11001000, 10000101, 10010011, 10010011 10010110
B. Hello in ASCII: 1001000, 0000111, 1011100, 1100100, 1101100
, lOMoARcPSD|18222662
COS2626 Assessment 3
C. Hello in ASCII: 1001000, 1100101, 1101100, 1101100, 1101111
15. In Unicode, the letter “r” is represented by the binary value of .
A. 0000 0000 0101 0100
B. 0000 0000 0111 0010
C. 0000 0000 0011 0000
D. 0000 0000 0011 0000
16. Which of these characters employs even parity?
A. 11111001
B. 11001000
C. 11111110
D. 00000001
17. What CONDITION must be met for error correction to be performed?
A. The sender does not receive an ACK message.
B. The receiver sends a NAK message.
C. Redundant information must be present so that the receiver knows
which bit or bits are in error and what their original values were.
D. The packet is not received.
18. An advertising firm decides to install a network to link the computers
of all employees together. The company plans to introduce some video
teleconferencing software across the board and plans to use e-mail and
database applications heavily. Due to the anticipated load on the network,
you want it to be as fast as possible. Which results does the proposed
solution deliver?
Required results:
(i) The network must operate at speeds of up to 100-Mbps.
(ii)The maximum segment length must be about 700 meters.
Optional result: Coaxial cable must be used.
EXAM PACK
, lOMoARcPSD|18222662
COS2626 Assessment 3
6. A company has two buildings approximately 300 meters apart. The
company wishes to transmit data between the two buildings on a routine
basis at speeds of up to 8 Gbps. Which wired LAN (Local Area Network)
technology from the list below can be applicable to this scenario?
A. Twisted pair Cat 8
B. Twisted pair Cat 7a
C. Coaxial cable
D. LED (Light-Emitting Diode) fiber optic
7. What is the frequency in Hertz of a signal that repeats 600 times within
one minute? What is its period?
A. 6 Hz; 6 seconds
B. 100 Hz; 10 seconds
C. 10 Hz; 0.1 seconds
D. 60 Hz; 0.010 seconds
8. The bandwidth for a data transmission line that can transmit within a
frequency range of 100 Hz to 3,500 Hz is .
A. 3,500 Hz
B. 3,400 Hz
C. 3,000 Hz
D. 3,600 Hz
9. A signal starts at point X. As it travels to point Y, it loses 8 dB. At point
Y, the signal is boosted by 10 dB. As the signal travels to point Z, it loses 7
dB. What is the dB strength of the signal at point Z?
A. -5 dB
B. -8 dB
C. -7 dB
D. -13 dB
, lOMoARcPSD|18222662
COS2626 Assessment 3
10. If a signal drops from 2000 watts to 1000 watts, there will be a ___dB
loss.
A. 3-
B. 20-
C. 50-
D. 1000-
11. What is the equivalent 4B/5B code of the bit string 1101 1010 0011
0001 1000 1001?
A. 00100 10110 10101 01001 10010 10011
B. 11011 10110 10101 01001 10010 01100
C. 11011 10110 10101 01001 01101 10011
D. 11011 10110 10101 01001 10010 10011
12. If quadrature amplitude modulation is used to transmit a signal with a
baud rate of 8000, what is the corresponding bit rate?
A. 16,000 bps (12 bits per baud)
B. 32,000 bps (4 bits per baud)
C. 12,000 bps (2 bits per baud)
D. 64,000 bps (16 bits per baud)
13. Which symbol is NOT part of the ASCII character set?
A. Á
B. @
C. 9
D. A
14. The ASCII (American Standard Code for Information Exchange) for the
message “Hello” would be .
A. Hello in ASCII: 11001000, 10000101, 10010011, 10010011 10010110
B. Hello in ASCII: 1001000, 0000111, 1011100, 1100100, 1101100
, lOMoARcPSD|18222662
COS2626 Assessment 3
C. Hello in ASCII: 1001000, 1100101, 1101100, 1101100, 1101111
15. In Unicode, the letter “r” is represented by the binary value of .
A. 0000 0000 0101 0100
B. 0000 0000 0111 0010
C. 0000 0000 0011 0000
D. 0000 0000 0011 0000
16. Which of these characters employs even parity?
A. 11111001
B. 11001000
C. 11111110
D. 00000001
17. What CONDITION must be met for error correction to be performed?
A. The sender does not receive an ACK message.
B. The receiver sends a NAK message.
C. Redundant information must be present so that the receiver knows
which bit or bits are in error and what their original values were.
D. The packet is not received.
18. An advertising firm decides to install a network to link the computers
of all employees together. The company plans to introduce some video
teleconferencing software across the board and plans to use e-mail and
database applications heavily. Due to the anticipated load on the network,
you want it to be as fast as possible. Which results does the proposed
solution deliver?
Required results:
(i) The network must operate at speeds of up to 100-Mbps.
(ii)The maximum segment length must be about 700 meters.
Optional result: Coaxial cable must be used.
