General Knowledge MCQs

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

by
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.

The soil found in areas of heavy rainfall and high humidity, where there is good growth of vegetation is

by
A. peat and marshy soil
B. saline and alkaline soil
C. black soil
D. alluvial soil
✅ The correct answer is option A.
Peat soils are also called marshy soils. They are a result of waterlogging and anaerobic conditions (which leads to partial decomposition of organic matter). They are found in the areas of heavy rainfall and high humidity, where there is a good growth of vegetation.