Q1. What is the name for a webpage address?
(a) Domain
(b) Directory
(c) Protocol
(d) URL
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Explanation: A Uniform Resource Locator (URL) is the address of resources on the internet. A URL indicates the location of a resources as well as the protocol used to access it. ©navclasses
Q2. The data storage hierarchy consists of
(a) Bytes, bits, fields, records, files and databases.
(b) Bits, bytes, fields, records, files and databases.
(c) Bits, bytes, records, fields, files and databases.
(d) Bits, bytes, fields, files, records and databases.
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Explanation: The data storage is the capacity to store the data on the different fields.
The correct sequence of the data storage is bits, bytes, fields, records, files and database.
Bit is the smallest unit of storage.
1 byte = 8 bits
A field is a limit of data consisting of one or more characters.
A record is the collection of the fields.
A file consists of many numbers of records.
A database is the collection of files.
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Q3. Which of the following domains is used for profit businesses?
(a) .org
(b) .net
(c) .edu
(d) .com
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Explanation: The domain name com is a top-level domain in the Domain Name system of the internet. Its name is derived from the word commercial, indicating its original intended purpose for domains registered by commercial organizations.
The most common top-level domains are .com .net and .org. originally each had a unique purpose:
.com: Commercial for profit websites
.net: Network related domains
.org: Nonprofit organizations
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Q4. What is the full form of USB as used in computer related activities?
(a) Ultra Security Block
(b) Universal Security Block
(c) Universal Serial Bus
(d) United Serial Bus
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Explanation: USB stands for Universal Serial Bus. USB is an external device which is connected to a computer port. A USB is a common interface that enables communication between devices and a host controller such as a personal computer (PC). It connects peripheral devices such as digital cameras, mice, keyboards, printers, scanners, media devices, external hard drive and flash drives. ©navclasses
Q5. Which of the following represents billion characters?
(a) Terabytes
(b) Megabytes
(c) Kilobytes
(d) Gigabytes
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Explanation: 1 Gigabyte (GB) equals to 230
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Q6. Which of the following pollutants is the major cause of respiratory diseases?
(a) Suspended fine particles
(b) Nitrogen oxides
(c) Carbon monoxide
(d) Volatile organic compounds
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Explanation: Suspended fine particles are the major cause of respiratory disease. ©navclasses
Q7. Assertion (A): In urban areas, smog episodes occur frequently in winters.
Reason (R): In winters, a lot of biomass is burnt by people for heating purposes or to keep themselves warm.
Choose the correct answer from the code given below.
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true and (R) is false.
(d) Both (A) and (R) are false.
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Explanation: In urban areas, smog episodes occur very frequently in winters is true. As this smog occurs due to many reasons like pollutions, burning of biomass/plastic, when sunlight and heat react with different gases. In winters, a lot of biomass is burnt by people for heating purpose or to keep them warm is also true. But it is not the only reason for occurrence of smog in winters. So, both the assertion and reason are true but reason in not the correct explanation of the assertion. ©navclasses
Q8. Occurrence of natural hazards is affected by
(A) Land use changes
(B) Drainage and construction
(C) Ozone depletion
(D) Climate change
Choose the correct answer from the code given below.
(a) (A), (C) and (D)
(b) (A), (B) and (C)
(c) (A), (B) and (D)
(d) (B), (C) and (D)
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Explanation: Occurrence of Natural hazards are affected by the changes in the land use, drainage and construction as there is no proper flow of water due to unregularly construction and climate change. ©navclasses
Q9. Which of the following pollutant gases is not produced both naturally and as a result of industrial activity?
(a) Chlorofluorocarbons
(b) Nitrous oxide
(c) Methane
(d) Carbon dioxide
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Explanation: Chloro fluoro carbons are a compound which has the traces of carbon, chlorine and fluorine. CFC is a pollutant that is not produced both naturally and as a result of industrial activity. CFC is nontoxic, non-flammable chemicals containing atoms of carbon, chlorine and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials as solvents and as refrigerants. ©navclasses
Q10. Among the following fuels of energy, which is the most environment friendly?
(a) Ethanol
(b) Biogas
(c) CNG
(d) Hydrogen
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Explanation: Hydrogen (H2) is the rule of energy that is the most environments friendly. Many researchers are working on hydrogen operated vehicles. Hydrogen might be used as an alternative fuel for different vehicles. ©navclasses