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WorksheetsSignal Processing Quiz
Total questions: 56
Worksheet time: 36mins
A signal is referred to as an even if it is identical to its time-reversed counterparts; x(t) = -x(t).
True
False
A random signal takes random values and we cannot determine its value.
True
False
Continuous signals are defined for discrete set of value.
True
False
Noise is the unwanted signal.
True
False
In crosstalk, a signal in one line is leaked to an adjacent line because of electrical coupling.
True
False
SSB is one type of FM Modulation.
True
False
In amplitude modulation, the amplitude of the carrier wave is varied in proportion to that of the message signal.
True
False
Attenuation is change in the shape of the signal.
True
False
Attenuation in a channel is the reduction in signal amplitude due to loss of energy.
True
False
ASK is the most efficient technique and is the mechanism commonly used today.
True
False
In FSK, both peak amplitude and phase remain constant for all signal elements.
True
False
Cryptography is science of breaking ciphers (solving cipher system).
True
False
AM receivers are inexpensive.
True
False
Burst error means that only one bit of given data unit.
True
False
CRC is the most powerful and easy to implement technique.
True
False
Binary PSK, in which we have only two signal elements, one with a phase of 0°, and the other with a phase of 90°.
True
False
PSK is less susceptible to noise than ASK.
True
False
Cross talk is:
The disturbance caused in the nearby channel or circuit due to transmitted signal.
Adjacent frequency rejection.
Generation of closely lying side bands.
None of the above.
Noise is added to a signal in a communication system:
At the receiver end.
At transmitting antenna.
In the channel.
During regeneration of the information.
Decrease in strength of signal is known as:
Tuning.
Modulation.
Attenuation
Amplification.
There are .......... types of distortion:
Two.
Three.
Four.
Five.
The opposite of amplification is:
Distortion.
Attenuation.
Interference.
Noise.
Cryptanalysis is:
The science of breaking ciphers.
To increase the speed.
Science including both cryptograph & cryptanalysis.
To make new ciphers.
When an error is discovered; the receiver can have the sender retransmit the entire data unit. This is known as:
Decryption.
Encryption.
Cryptology.
Error Correction.
The most powerful and easy to implement technique is:
CRC.
Checksum.
Parity Check.
Burst Error.
CRC is based on binary:
Addition.
Division.
Subtraction.
Multiplication.
Checksum is based on binary:
Addition.
Division.
Subtraction.
Multiplication.
....... is a type of Error Detecting Codes:
Single-bit Error.
Burst Error.
Parity Check.
All of them.
If we sent 10101110 and we received 01101010, so the error is:
Single-bit Error.
Burst Error.
Parity Check.
A&B.
QAM has ....... advantage as PSK over ASK:
More.
Fewer.
Best.
The same.
8PSK is a modulation technique with different .......... symbols each representing .......... bits:
8 – 2.
8 – 3.
8 – 4.
4 – 4.
The simplest PSK is:
BPSK.
QPSK.
QAM.
ASK.
....... intercepts the radio waves and converts them to tiny alternating currents:
Antenna.
RF Amp.
IF Amp.
Speaker.
In Analog Receiver, ....... recover the desired information:
Antenna.
RF Amp.
IF Amp.
Demodulation.
....... is the most efficient of these options and is the mechanism commonly used today:
BPSK.
QPSK.
QAM.
ASK.
........... , ............ and ............ are measurements of the electrical signal.
Amplitude
Frequency
Phase
all of them
(a) is the width of the range of frequencies.
(a) is the difference in hertz between the highest frequency the signal uses and the lowest frequency it uses.
All computers use (a) signals to store information.
(a) is any physical set of components that takes a signal and produces a signal.
Types of AM modulation: ............ , ............ , and ............ .
DSB
SSB
VSB
all of them
(a) is the process of encoding a digital information signal into the amplitude, phase, or frequency of the transmitted signal.
(a) is the science of design & implementation of Cipher system.
(a) is the science of breaking ciphers (solving cipher system).
(a) is the science including both cryptography & cryptanalysis.
Mention three Digital Modulation techniques.
Mention three Error Detecting Codes techniques.
Mention the types of analog modulation
16QAM
4 bit for one symbol
16 symbols
16bit and 4 symbols
16 symbols and 4bit /symbol
Digital signals are continuous and can take any value.
True
False
A high SNR means a cleaner signal with less noise.
True
False
Crosstalk is a type of interference between adjacent lines.
True
False
PM stands for Pulse Modulation
True
False
The amplitude of an FM signal remains constant.
True
False
BPSK uses four different phase shifts to represent data.
True
False
Which modulation technique is most resistant to noise?
ASK
Psk
FSK
