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101) Heat from the sun reaches earth by the process of
Correct Answer - Option
(C)
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Learn POLICE SI MCQs with answers [Page 11 of Department 70]
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102) Ocean currents are an example of
Correct Answer - Option
(A)
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103) What type of heat transfer is boiling water?
Correct Answer - Option
(C)
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104) Good password helps organization
Correct Answer - Option
(D)
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105) The main function of the ALU is to
Correct Answer - Option
(A)
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106) ......... allows voice conversations to travel over the Internet.
Correct Answer - Option
(B)
Explanation :
Internet Telephony refers to the technology that converts analog speech (voice) signals into digital signals and routes them through packet-switched networks of the internet. Those signals bypass the traditional circuit switched networks used for telephone calls and thus escape the longdistance phone charges.
107) Software such as viruses, worms and Trojan horses that has a malicious content is known as
Correct Answer - Option
(C)
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108) The hardware device or software program that sends messages between networks is known as a
Correct Answer - Option
(C)
Explanation :
The device or program that forwards messages between networks is known as a router. A router is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP's network. Routers are located at gateways, the places where two or more networks connect.
109) Which component of a computer system perform arithmetic calculations ?
Correct Answer - Option
(A)
Explanation :
An arithmetic logic unit (ALU) is a digital circuit used to perform arithmetic and logic operations. It represents the fundamental building block of the central processing unit (CPU) of a computer. Modern CPUs contain very powerful and complex ALUs.
110) What is the full form of LAN?
Correct Answer - Option
(C)
Explanation :
LAN stands for Local Area Network is a computer network that interconnects computers within a limited area such as a home, school, computer laboratory, or office building, using network media In contrast to wide area networks (WANs), LANs include smaller geographic area, and marked by non-inclusion of leased telecommunication lines.
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