Technology MCQs

193. The invention of the transistor, or semiconductor, was one of the most important developments leading to the personal computer revolution. What company invented the transistor in 1947?

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A. International Business Machines
B. MITS
C. Xerox
D. Bell Laboratories
✅ The correct answer is option D.
The transistor, which essentially is a solid-state electronic switch, replaced the much less suitable vacuum tube. Because the transistor consumed significantly less power, a computer system built with transistors was much smaller, faster and more efficient than a computer system built with vacuum tubes.

196. What are the three main search expressions, or operators, recognized by Boolean logic?

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A. FROM, TO, WHOM
B. AND, OR, NOT
C. SEARCH, KEYWORD, TEXT
D. AND, OR, BUT
✅ The correct answer is option B.
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.

200. Which is the best search tool for finding Web sites that have been handpicked and recommended by someone else?

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A. Subject directories
B. Search engines
C. Meta-search engines
D. Discussion groups
✅ The correct answer is option A.
Subject directories tend to house fewer�sometimes more relevant�sites than those found through search engines. Sites in a subject directory often have been handpicked by editorial teams or specialists in a particular field.