EST COACHING VOLUME 2.2
Electronics Engineering Quiz
Test your knowledge in electronics and telecommunications with our comprehensive quiz! Designed for aspiring engineers and tech enthusiasts, this quiz covers a wide range of topics including digital transmission, antenna theory, and network protocols.
Challenge yourself and see how much you really know:
- 100 multiple-choice questions
- Realistic scenarios and calculations
- Perfect for quick learning or revising core concepts
In a coaxial line if the inner diameter Is 0.51 cm and the center conductor has a diameter of 0.22 cm. What Is the characteristic impedance?
A. 50.4 ohms
B. 60.5 ohms
C. 110.4 ohms
D. 54.0 ohms
Which of the following technologies employs a Distributed Queue Dual Bus (DQD13) architecture?
A. ATM
B. FDDI
C. SMDS
D. SONET
Which of the following is not a field contained in a Frame Relay frame header?
A. Committed Information Rate (CIR) -
B. Command/ Response (CR) Indication
C. Extended Address (EA)
D. Forward Explicit Congestion Notification (FECN)
Which term represents information and overhead at the Transport layer in the 0SI 7- layer model?
A. Sessions
B. Segments
C. Frames
D. Packets
As specified by the National Committee on Radiation Protection Measurement (USA), what would be the maximum accumulated permissible dose to the whole body of a 50-year-old man?
A. 100 rems
B. 610 rems
C. 160 rems
D. 556 rems
Which of the following is defined under the Broadband ISDN standards?
A. ATM
B. BRI ISDN
C. PRI ISDN
D. SMDS
A digital transmission line has a bandwidth of 2 MHz. With signal-tonoise of 36 dB, what is the maximum capacity the line can handle in Mbps?
25 Mbps
50 Mbps
24 Mbps
48 Mbps
What is the term for a device that combines several sources Into a single bit stream with a data rate that Is less than the combined data rates of all input sources?
A. Time division multiplexer -
B. Inverse multiplexer
C. Add-drop multiplexer
D. Statistic time division multiplexer
Inverting the inputs of an AND gate gives the same result as inverting the output of which of the following?
A. an AND gate
B. an OR gate
C. an X-OR gate
D. a NOR gate
A helical shape antenna with eight turns is used to track a satellite that is operating at 1.2 GHz. If the spacing for the antenna is 10 cm, what is the beamwidth of the antenna?
28. 80 degree
29.08 degree
28.90 degree
98.20 degree
In Microsoft Excel, how does one keep the heading from scrolling when viewing a spreadsheet with may rows?
A. 'Split' from 'View' menu
B. 'Freeze Panes' from Window' menu
C. 'Heading' from 'View' menu
D. 'Heading' from 'Window' menu
Two halfwave dipole antennas are positioned for optimum transmission and reception. Calculate the opencircuit voltage induced in one A/2 dipole when 20 W of power at250Mhz is radiated from another λ/2 dipole km away.
191.64
911.32
1150.32
119.23
What is a cookie?
A hardware or software setup that translates between two dissimilar protocols
An Internet software tool for locating people on other Internet sites
A set of data that a website server glues to a browser the first time the use visits the site, that Is updated with each return visit.
It is a snack biscuit
What is the term for a device that allows for high data rate access at a customer location by distributing the data over several T-1 carriers?
A. Time division multiplexer
B. Digital cross-connect switch
C. Inverse multiplexer
D. Channel service unit
The tuned circuit of the oscillator in a simple AM transmitter employs a 50 uH coil and a 1 nF capacitor. If the oscillator output is modulated by audio frequencies up to 10 kHz, calculate the range occupied by the sidebands.
722-707 kHz
712-772 kHz
722-702 kHz
770-272 kHz
It the maximum number of free electrons In a certain Ionospheric layer Is 2 x 10^12 per m3, what is its critical frequency?
12.73 Mbps
13.27 Mbps
17.23 Mbps
21.37 Mbps
TCP residing in the receiving host will send an acknowledgement for which of the following?
A. name
B. Packet
C. Segment
D. Session
Three-foot cable sections that normally cost $79 each are on sale at 2 for $150. How much can be saved by purchasing 20 cable sections at the sale price?
A. $40
B. $160
C. $120
D. $80
What is the ohmic resistance of the antenna, if the efficiency of the antenna is 0.96 and the radiation resistance is 72Ω.
3 ohms
0.3 ohms
0.33 ohms
33 ohms
As a ray of light moves away from the center of a multi-mode, graded index fiber, which of the following statements is true?
A. Light will be absorbed by cladding
B. Light will be reflected by cladding
C. Velocity of light will decrease
D. Velocity of light will Increase
Which of the following statements regarding the difference between a superframe (SF) and an extended superframe (ESF) In a T-1 carrier is NOT true?
A. Both SF and ESE use A, B, C and D signaling bits
B. A SPF is made up of 12 frames, and ESF is made up of 24 frames
C. An extended superframe includes a CRC function, a SF does not
D. an EST conveys less frame sync organization Information than n SF
What would be the difference (In decibel) to the antenna dish GAIN horn Its original value If Its diameter it Increased by threefold while the other parameters remain the same?
3kd^9
9kd^3
39kd^3
39kd^9
The company which provides you with a connection to the Internet via either a Dial-up Connection or a Direct Connection Is called a (n):
A. WAIS
B. IRC
C. BPS
D. ISP
In aperture antennas for microwave communications, what is the aperture number if the angular aperture is 55°?
0.48
0.50
1.0
0.40
ATM and Frame Relay are referred to as "Fast Packet" technologies. At which layer of the 0SI 7-layer model do these technologies work?
A. Data link
B. Network
C. Session
D. Transport
What power density is required to produce electric field strength of 100 volts per meter in air?
27 W/m^2
26.5 W/m^2
25.6 W/m^2
26 W/m^2
In a SONET network, which of the following is a function of the Line Overhead?
Automatic Transfer Machine Network
Automatic Switching Machine
Automatic Protection Switching
Frame Alignment pattern Network
A dish designed for operation at 150 MHz is operated at twice that frequency. By what factor do gain change?
A. 2 times
B. 3 times
C. 4 times
D. 5 times
Which of the following is most similar in function to an Ethernet LAN switch?
A. Bridge
B. Gateway
C. Repeater
D. Router
The most common distance-limiting factor for multi-mode fiber when carrying high oil-rate traffic is:
A. Attenuation loss
B. Chromatic dispersion
C. Fresnel loss -
D. Modal dispersion
Which of the following modulation schemes provides 4 bits per baud?
A. QPSK
B. 8-PSK
C. 16-QAM
D. 64-QAM-
Which best describes the type of computer-based device that interconnects two LANs of the SAME logical link control protocol and of different medium access control protocol?
A. Gateways
B. Bridge
C. Server
D.Router
The amount of radio signal reflected from a given surface depends on the nature of the surface and the angle at which the wave strikes the surface. If the incident angle of the radio wave energy is perpendicular to a dull surface, more of the incident energy is
A. transmitted
B. Absorbed by the surface
C. regenerated
D. reflected
Why is the F2 region mainly responsible for the longest distance radio-wave propagation?
A. Because it is the highest Ionosphere region
B. Because it is the lowest ionosphere region
C. Because it does not absorb radio waves as much as other ionospheric regions - Ans.
D. Because it exists only at night
In system networking, which device or Software program determines the next network point to which a packet should be forwarded toward its destination?
A, Gateway
B. Switches
C. Bridge
D. Router
Which of the following determines the characteristic impedance of a coaxial antenna feed line?
The diameter of the braid and the length of the line
The frequency of the signal and the length of the line
The diameter of braid and the frequency of the signal
The ratio of the diameter of the inner conductor to the diameter of braid
Which type of the technique does the signal remain at the binary level assigned to it for the entire bit time?
A. Manchester encoding
B. Biphase encoding
C. Nonreturn to zero (NRZ)
Return to zero
In serial type of data transmission which bit is usually transmitted last?
A. parity Bit (PB)
B. Least Significant Bit (LSB)
C. Most Significant Bit (MSB)
D. Non -Significant Bit (NSB)
To distinguish between varieties of unshielded and shielded twisted pair cables, EIA/TIA formulated several cable categories according To their electrical specifications. Which of these voice-grade LJTP cable is capable of? Supporting transmission rates of up to 4 Mbps belongs? A. cat2 -
A. cat2
B. cat 1
C. cat 6
D. cat 4
If an RF transmission line is open circuited, what will be the current at the end of the line?
A. Zero
B. Maximum
C. Minimum
D. Infinite
If the characteristic impedance of the coax line does not match the antenna input impedance then:
A. Standing waves are In the & transmission Line
B. the SWR reading falls to 1:1
C. Heat is produced at the junctions
D, the antenna will not radiate any signal
In space propagation, radio waves go behind the so-called geometrical horizon or line-Of-sight horizon. This is due to what phenomenon in the air?
A. Diffraction
B. Deflection
C. Reflection
D. Refraction
In HF radio communications, typically what percentage of the maximum usable frequency (MUF) is the best frequency to use for optimum transmission (FOT)?
A. 75
B. 100
C. 85
D. 65
Antenna efficiency is dependent on the effective radiation resistance or the electrical length of the antenna element. For antenna length of one quarter wavelength what is its Effective radiation resistance?
A. Minimum
B. Maximum
C. Infinite
D. zero
Which of the following media does NOT belong to the group?
A. Vacuum
B. Coax cable
C. Twisted pair
D. Optical Cable
A transmission can be physically and/or electrically long. What will make any length of transmission line to appear as an infinitely long line?
A. Leaving the line open at the end
B. Shorting the tine at the end
C. Increasing the standing wave ratio above unity
D. Terminating the line in its characteristic Impedance
A non-resonant RF line is infinitely long. This is because ________.
A. The tine is not properly terminated
B. All the energy travelling down line is absorbed by the load
C. All the energy of the tine is
D. The characteristic impedance of the line is greater than the impedance of the load
A noiseless channel with a bandwidth of 10,000 Hz transmitting a signal with four signal levels can handle a maximum of 40 kbps_ If the signal level was altered to eight, what will be the maximum channel bit rate kbps?
A. 80
B. 30
C. 60
D. 50
In radio communications, sidebands are generally produced through modulation process. How would you understand the statement - "Not all forms of modulation produce sidebands".
A. Completely true
B. Partially true
C. Partially false
D. Completely false
A simple Am transmitter employs an oscillator with a 40 uH coil and 1 nF capacitor. If the oscillator output is modulated by audio frequency of up to 24kHz what is the center frequency of the transmitter in Hz?
A. 687,670.87
B. 735760.88
C. 731769.88
D. 795772.86
A TV has a height of 100m . By how much of the height of the tower should be increased to triple its coverage range (in m).
A. 200
B. 800
B. 900
D. 300
What category of performance is used for inside wire and cable systems?
A. Category 3
B. Category 5e
C. Category 6
D. Category 3A
Which of the ff. Is used for voice application and data rate up to 10 Mbps?
Category 3
B. Category 5e
C. Category 6
D. Category 6A - Ans.
Which of the ff. Is a standard for balance twisted pair cable and components supporting signaling rates up to 100MHz?
A. Category 3
B. Category 5e
C. Category 6 -
D. Category 6A
What is a standard for balance twisted pair cable and components supporting signaling rates up to 500MHz?
A. Category 3
B. Category 5e
C. Category 6
D. Category 6A
Category 5e or Enhance category 5 is intended to support systems up to 1000Base-T of Gigabit Ethernet up to distance of ______.
A. 10m
B. 100m
C. 1000m
D. 10000m
What is a standard for balance twisted pair cable and components supporting signaling rates up to 250MHz?
A. Category 3
B. Category 5e
C. Category 6
D. Category 6A
Category 6A Or Augmented Category 6 is design to support_____up to distances of 100 meters
A. 1000Base-T
B. 100Base-T
C. 100GBase-T
D. 10GBase-T
Twisted pair cabling is used for both voice and data cabling and typically a
A, 20-22 AWG
B. 22-26 AWG
C. 26-28 AWG
D. 18-20 AWG
What twisted pair cable ISO class used for frequency Of 16 MHz?
A. Class C
B. Class D
C. Class E
D. Class EA
What is the usual impedance characteristic of twisted pair cables at 100 MHz?
A. 10 ohms
B. 50 ohms
C. 100 ohms
D. 150 Ohms
Twisted pair cabling uses a color code to allow installers to quickly identify each pair within a cable. The tip colors Indicate
A. The size of the ring
B. Which group a pair is located
C. The position of the pair within the group of five tip options
D. All choices are correct
At which time step is a sample taken in ADC?
A. Odd
B. Even
C. prime
D.1
What Is expressed as the magnitude of sample represented by finite number which is proportional to some voltage in audio signal?
A. Quantizing
B. Amplitude
C. phase
D. Frequency
In which manner each sample is represented in audio signal?
A Back porch
B. AGC (Automatic gain control)
C. Root mean square
D. Stepwise
Which of the ff. Cannot be detected & therefore it is difficult to separate the original signal from distorted signal in audio signal?
A. Bandwidth
B. Amplitude
C. Distortion
D. Wavelength
What is the critical angle of the signal when it passes from glass, with relative permittivity of 7.8, into air?
A. 7.8
B. 8.7
C. 6.8
D. 6.7
Which type of audio video files can be made portable by downloading?
A. Uncompressed
B. Compressed
C. Noisy
D. Distorted
Which is the important part of the system which are being used to time shift broadcast programs to skip commercial breaks?
A. Hard drive-based servers
B. Software drive-based servers
C. Disk base recording
D. Digital audio broadcasting
In the TCP/IP protocol suite, which of the following is a network iayer protocol?
A. The Stream Control Transmission protocol (SCTP)
B. The secure Shell (SSH)
C. The Internet protocol (IP)
D. User Datagram protocol (UDP)
In which of these a person is continually chased/followed by another person or a group of various people?
A. Identity theft
B. Stalking
C. Bullying
D. Phishing
A_____ can be a hardware device or a software program that filters all the packets data that comes through a network, the internet, etc.
A. Firewall
B. Antivirus
C. Malware
D. Pizza
What is the horizontal beamwidth of a pyramidal horn antenna if its width is one wavelength?
80
88
08
18
Which of these would refer to the exploration of the apt, ethical behaviors that are related to the digital media platform and online environment?
A. Cybersecurity
B. Cybersafety
C. Cyberethics
D. Cybercrime
Which of these ports and IP address scanners is popular among the users?
A. Angry birds
C. Angry IP Scanner
B. Snort
D. Cain and Abel
Which of these is NOT a scanning type?
A. Null Scan
B. Xmas Tree Scan
C. SYN Stealth
D. Cloud Scan
We use the transit time and the response time to measure a network's
A. Reliability
B. Peformance
C. Longevity
D. Security
When DC flows through a transmission line, the movement of electrons through the conductor's cross section is uniform However, when AC is applied, the expanding and collapsing fields about each electron encircle Other electrons. This retards the movement of the encircled electrons. Which phenomenon I referred to?
A. Self-charging
B. Self-discharging
C.Self-induction
D. Self-conduction
Select the command that is used to manipulate the TCP/IP routing table.
A. lfconfig
B. Ipconfig
C. Route
D. IProute
The bandwidth (BW) of a digital signal depends the bit rate and the pulse Shape used. In dimensionality theorem. If the rate Of transmission required is 20 Mbps. What must be the minimum BW of the medium?
A. 10 GHz
B. 40 THz
C. 10 kHz
D. 10 MHz
Which utility is used if you want to find the number of routers between a source and destination?
A. lfconfig
B. Ipconfig
C. Route
D. Traceroute
Which of determines the Characteristic impedance of a coaxial antenna line?
A. The diameter of the braid and the length of the line
B. The frequency of the signal and the length of the line
C. The diameter of the braid and the frequency of the signal.
D. The radio of the diameter the inner conductor to the diameter of the braid.
Select which one is used to relate to config in Microsoft Windows.
A. Display all current TCP/IP network configuration values
B. Modify DNS settings
C. Modify DHCP settings
D. All of choices
If an RF transmission line is open circuited, what be the current at the end of the line?
A. Zero
B. Maximum
C. Minimum
D. Infinite
A helical antenna has the ff. dimensions: pitch 1/3 wavelength; diameter ¼ wavelength and turns is 27.What the gain in dB?
29.1
19.2
12.9
92.1
Which one used in delivery, the Deliverer of the IP packet and the destination are on different networks.
A. A connection-oriented
B. An Indirect
C. A direct
D. None of the choices
Choose from the following in which one forwarding, the mask, and destination addresses are both 0.0.0.0 in the routing table.
A. Next-hop
B. Default
C. Host-specific
D. Network-specific
In which type of channel coding is the Information bearing message stream is encoded in continuous fashion by interleaving information bits and error control bits?
A. Manchester
B. Correlation
C. Convolution
D. Block
Which of these is also malicious software?
A. Badware
B. Malicious Ware
C. Malware
D. Ilegalware
A TVRO installation for use with a Cband satellite (download frequency at 4 GHZ), has a diameter of about 3.5 meters and an efficiency of 60%. Calculate its beamwidth
0.75
1.50
0.075
1.075
Which of the ff. Is the correct option about the purpose of peak clipper circuits in radio transmitters?
A. To reduce bandwidth
B. To increase bandwidth
C. To prevent overmodulation
D. To regulate oscillator I/P Voltage
In a spread spectrum tech. The frequency of the carrier of the transmitter changed according to predetermined sequence, called pseudorandom at a rate higher that of the serial binary data modulating the carrier. Which type of spread spectrum this technique is identified to?
A. phase-hopping
B. Direct-sequence
C. Intermode-hopping
D. Frequency-hopping
If the antenna current increases 3.4 times, how much does the radiated power increase?
6.8
11.56
12
7
The beamwidth and the directive gain the antenna are interrelated with each other. If the beamwidth of the antenna decreases. Its directive gain
A. Increase
B. decreases
C. Remain constant
D. double
The net reactance of the antenna varies with the wavelength. If the antenna is shorter than 1/4 one quarter wavelength. Which of the following dominates?
A. Inductive reactance
B. Resistance
C. Capacitive reactance
D. Capacitive and inductive reactance are the same.
Fiber optic cables are widely used for high-speed data transport. What is the main role of the glass component in a glass fiber optic cable?
A. Carry the light
B. Shock absorber
C. Prevent light leakages
D. Protect the cable itself
Using the cipher algorithm. Which of these types of text would be transformed?
A. Plain text
B Scaly text
C Complex text
D. Transform text
Which of the following malware types not clone or replicate itself through infection?
A. Viruses
B. Worms
C. Trojans
D. Rootkits
The DNS would translate any Domain name into _______
A. IP
B. URL
C. Binary
D. Hex
Which of these is usually referred to as the port number (default) of several web servers like apache?
A. 728
B. 28
C. 87
D. 80
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