CBSE Questions for Class 8 General Knowledge India: Science And Technology Quiz 6 - MCQExams.com

Consider the following statements:
Multi-mode optical fibres are used for long-distance communication links.
Single-mode optical fibres are used for most communication links less than 500 metres. 
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements about Fibre Optics
Optical fibres are fine strand of high quality glass, in which information is transmitted with the help of light beam.
Light is kept in the core of the fibre by total internal reflection.
BSNL has the largest optical fibre cable network in India.
Fibre-to-Home refers to the optical fibre cable that replaces the standard copper wire of the local Telco.
Which of the statements given above is/are correct?
  • 1,2, 3 and 4
  • 1,2 and 3
  • 2 and 3
  • Only 3
Consider the following statements:
Ethernet is a family of computer networking technologies for Wide Area Networks (WANs).
Besides computers, the ethernet can be used to interconnect other appliances and personal devices.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
S-band is a part of the microwave band of the electromagnetic spectrum.
S-band is used in the transmission of data through Bluetooth.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
What is the Web Search Engine?
  • It is an engine to download songs and movie from a particular website.
  • It is an engine designed to look out for the information on internet.
  • It is an engine designed to extract confidential information like password, account-ID through internet.
  • Both A and C
Consider the following statements:
Very Small Aperture Terminal systems can use both C and Ka bands to transmit signals.
VSATs are used only in the transmission of narrow band data.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and2
  • Neither 1 nor 2
Which one of the following electromagnetic radiation is used by satellite phone for the communication?
  • Radiowaves
  • X-rays
  • Gamma-rays
  • Microwaves
Which one of the following descriptions is correct about the intranet?
  • It is a private computer network that uses Internet Protocol technologies to securely share any part of an organizations information.
  • It is the organisation's internal website and information technology infrastructure.
  • It is generally accessible by customers suppliers or other approved parties.
  • Both A and B
What is the Semantic Web? 
  • It is a collaborative movement led by the World Wide Web Consortium to promote common formats for data on the WWW
  • It is a new website developed to compete with the WWW set up by the Tim Berners-Lee
  • It is a World Wide Web Consortium to replace the insecure mode of surfing into registered secured interface
  • None of the above
Consider the following statements:
Internet Protocol version 4 (IPv4) uses four-byte addresses which limit the address space to 232 addresses.
Internet Protocol version 4 (IPv4) was the first publicly used version of the Internet Protocol.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following is correct about the Internet Protocol addresses versions (IPv)?
  • IPv4 is almost exhausted in 2011 and it will be succeeded by IPv6
  • IPv6 addresses are 128 bits long and deemed enough for the foreseeable future
  • IPv6 addresses are written in eight groups of four hexadecimal digits separated by colons
  • Both b and c
WiMAX is related to which one of the following? 
  • Biotechnology
  • Space technology
  • Missile technology
  • Communication technology
Which one of the following network is a network architecture in which a set of clients are connected via shared communications line?
  • Mesh network
  • Ring network
  • Star network
  • Bus network
Which one of the following mobile services in India launched the 3G (third generation) service for the first time?
  • Idea Cellular
  • Bharti Airtel
  • Reliance Telecommunication
  • BSNL
Consider the following statements:
2G mobile system uses bandwidth of 30-200 KHz spectrum.
3G mobile system uses bandwidth of 15-20 MHz spectrum.
4G mobile system uses bandwidth of at least 40 MHz spectrum.
Which of the statements given above is/are correct?
  • 1, 2 and 3
  • 1 and 3
  • 2 and 3
  • Only 2
Consider the following statements:
C-band performs better in comparison with Ku-band for satellite communications.
C-band is the first frequency band that was allocated for commercial telecommunications via satellites in the world.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following electromagnetic waves is used by the Bluetooth to exchange data over short distances?
  • Microwave
  • Radiowave
  • X-rays
  • UV-rays
Which of the following countries in the world implemented the enhanced data rates for GSM evolution for the first time? 
  • Japan
  • Germany
  • Finland
  • United States
Consider the following statements:
Analog voice data (signal) can be compressed and multiplexed much more effectively than digital voice data.
The digital systems emit less radio power from the handsets than the analog systems.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following countries launched the 1G (first generation) telecommunication service for the first time in the world?
  • Japan
  • United States
  • United Kingdom
  • China
Select the correct answer from the following statements _____________________.
  • 2.5G (second and a half generation) is the 2G-systems that have implemented a packet-switched domain in addition to the circuit-switched domain.
  • 2.5G is the 2G-systems that have implemented a circuit-switched domain in addition to the packet-switched.
  • Both of the statements A and B are correct.
  • Neither A nor B is correct.
Which of the following is the first state in India to have 3G services of telecommunication?
  • Maharashtra
  • Bihar
  • Uttar Pradesh
  • Andhra Pradesh
Which one of the following companies launched the 3G mobile telecommunication for the first time in the world?
  • Nextel (United States)
  • NTT DoCoMo (Japan)
  • Telus Mobility (Canada)
  • Bharti Airtel (India)
Consider the following statements:
EDGE is standardised as a part of the GSM family.
EDGE is the 3G-mobile telecommunication system.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
Bluetooth is a wireless technology which creates WPAN to exchange data.
Bluetooth uses the electromagnetic spectrum in the range 2402-2480 MHz.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
1G-mobile telecommunication technology uses analog signals for telecommunication.
2G-mobile telecommunication uses both analog and digital formats for data transmission.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
LTE is designed to increase the capacity and speed of mobile telephone networks.
LTE is the 4G technology according to the IMT Advanced 4G requirements.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following statements about the radio waves of the electromagnetic spectrum is not correct?
  • Radio waves are generally captured by antennas of appropriate size.
  • Radio wave is ranges from hundreds of metres to about one millimetre.
  • Radio wave is used in mobile phones, wireless networking and amateur radio.
  • Wi-Fi is mainly depended on the radio waves to transmit data or information.
Which of the following is not the term of 'Information Technology'?
  • Cyberspace
  • Upload
  • Modem
  • Light storage
Consider the following statements
Mobile WiMax is the third generation (3G) of mobile telecommunication systems.
LTE advanced is the fourth generation (4G) of mobile telecommunication.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
4G service peak speed for low mobility communication such as pedestrians and stationary users is 100 Mbit/s.
4G service peak speed for high mobility communication such as from trains and cars is 1 Gbit/s.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
What does the term Dolby B and Dolby C printed on the tape-recorders and other sound systems refer to?
  • Frequency modulated system
  • Amplitude modulated system
  • Noise reduction circuit
  • Both DC and AC power can be used
Which one of the following countries firstly deployed the 4G system of mobile telecommunication in the world?
  • South Korea
  • Japan
  • United States
  • England
Consider the following statements:
4G system provides mobile USB wireless ultra-broadband internet access to smartphones, and to other mobile devices.
4G system is started deploying partially in Delhi and Maharashtra.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
From which one of the following GSM technologies, the LTE(Long Term Evolution) is made to the enhancement of telecommunication?
  • WiMax
  • CDMA
  • UMTS
  • HSDPA
Consider the following statements:
Smart card is a plastic card with an embedded microchip.
Digital technology is primarily used with new physical communication medium such as satellite and fibre optics transmission.
A digital library is a collection of documents in an organised electronic form available on the internet only.
Which of the statements given above is/are correct?
  • 1,2 and 3
  • 1 and 2
  • 2 and 3
  • Only 2
Consider the following statements:
Bluetooth can be used in fax, telephones, Global Positioning System (GPS) receivers, and video game consoles.
Bluetooth is used as a wireless communication with PC input and output devices like mouse, keyboard and printer.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
Microwave oven uses microwaves to heat food.
Microwave oven is highly efficient in the foodstuff containing water, fats and sugar.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following persons discovered the gamma-rays?
  • Paul Villard
  • Marie Curie
  • JJ Thomson
  • Adam Osborne
Consider the following statements:
In cordless telephone, it needs a main electricity to supply power to the base station.
The cordless handset is powered by a rechargeable battery which is charged when the handset sits in its cradle.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
Bluetooth creates Personal Area Networks (PANs) with high levels of security.
Bluetooth uses radio waves to transmit data and information between two terminals wirelessly.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following is the fourth generation mobile service according to International Mobile Telecommunication Union?
  • Mobile WiMAX
  • LTE
  • HSPA$$^+$$
  • LTE Advanced
Which one of the following statements is correct?
  • Wi-Fi technology creates Metropolitan Area Network while Bluetooth creates Wireless Local Area Network.
  • Both Wi-Fi and Bluetooth use microwave signals to transmit information between two terminal devices.
  • Wi-Fi can be used in the transmission of information more than 100 metres while Bluetooth in 100 or less than 100 metres distance.
  • Both the statements 'a' and b about the Wi-Fi and Bluetooth are correct.
Which of the following statements is correct about the gamma-rays?
  • Gamma-rays lie in between UV- and X-rays.
  • Gamma rays are used in the irradiation of food and sterilization medicinal equipments.
  • Diagnostic imaging instrument PET scans is based on the Gamma-rays.
  • Both statements (b) and (c) are correct about the Gamma-rays.
Which one of the following is a family of technologies that provides digital data transmission over the wires of a local telephone network?
  • GPS
  • EGPRS
  • UTRAN
  • DSL
Consider the following statements:
LTE supports both Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD).
India has started the implementation of LTE mobile technology in 2011 itself. 
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
In which one of the following ranges of frequency, the radio wave is used to transmit signals from the wireless handset to the base station?
  • Below 0.5 GHz
  • Around 2 to 5 GHz
  • Around 10 to 20 GHz
  • Around 30 to 50 GHz
Select the correct answer from the following:
  • In WiMAX, the operation beyond the maximum range of 50 km reduces the bitrate of the device
  • In WiMAX, the operation beyond the maximum range of 50 km increases the bitrate of the device
  • In WiMAX, reducing the range of operation to or less than 1 km allows a device to operate at higher bitrates
  • Both the statements a and c' are correct about the WiMAX operations
Consider the following statements:
Wireless Local Loop is used in the supply of broadband Internet to telecommunications customers.
Roaming abilities are very high in the Wireless Local Loop as compare with cellular network.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Choose the correct answer from the following statements about the Digital Subscriber Line (DSL)?
  • DSL circuit provides signals in pure form of digital signals
  • DSL circuit does not need modem to modulate bits pattern signals to certain high-frequency impulses
  • DSL uses high-frequency sinusoidal carrier wave modulation which is the analog signal
  • Both the statements (a) and (b) are correct about the DSL
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