World Science and Technology – Exercise – 2

86. What is a spider?

(a) A computer virus
(b) A program that catalogs Web sites
(c) A hacker who breaks into computer systems
(d) An application for viewing Web sites

Answer
Answer : (b)
Explanation
Explanation : Spiders are also referred to as “bots” or “crawlers,” and constantly scan the Internet for new and updated Web sites. Let us discuss.
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87. What is the Websites code for the country Mongolia?

(a) MN
(b) ML
(c) MG
(d) MO

Answer
Answer : (a)
Explanation
Explanation : No answer description available for this question. Let us discuss.
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88. What is the Websites code for the country New Zealand?

(a) NZ
(b) NW
(c) NE
(d) ZL

Answer
Answer : (a)
Explanation
Explanation : No answer description available for this question. Let us discuss.
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89. What are the three main search expressions, or operators, recognized by Boolean logic?

(a) FROM, TO, WHOM
(b) AND, OR, NOT
(c) SEARCH, KEYWORD, TEXT
(d) AND, OR, BUT

Answer
Answer : (b)
Explanation
Explanation : The three most commonly used Boolean operators are: AND, OR, and NOT. On the Web, Boolean operators are used in advanced searches to combine search items. For example, an “AND” operator between two words (“football AND television”) tells the search engine to find documents that contain both of these words. Let us discuss.
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90. Which one of the following is a search engine?

(a) Macromedia Flash
(b) Google
(c) Netscape
(d) Librarians’ Index to the Internet

Answer
Answer : (b)
Explanation
Explanation : A search engine is a program that searches for Web documents with keyword (s) you specify. Yahoo!, Google, and AltaVista are just three examples of search engines that have been created to help you find information on the Web. Let us discuss.
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