Tag: science & technology

In relational database terminology, a row (also called a tuple or record) represents a single complete entry in a table. Columns contain attributes/fields, and a row contains all the values for one entity. A relation is the table itself, not a single record.

In spreadsheet applications, cells can contain three types of data: labels (text), values (numbers/dates), and formulas (calculations). A range refers to a group of cells selected together (like A1:A10), but it is not a type of content that resides in a cell itself - it's a reference to multiple cells.

Serif typefaces have small decorative lines or strokes (serifs) at the ends of characters, like Times New Roman or Georgia. Sans serif typefaces (like Arial) lack these marks. The small marks themselves are called serifs. Serif fonts are traditionally used for printed body text due to readability.

The four fundamental database models are hierarchical (tree structure), network (graph structure allowing many-to-many relationships), relational (table-based with SQL), and object-oriented (stores objects directly). Option D correctly lists these four types, though 'objected oriented' contains a typo.

Morphing is a special effect that smoothly transitions one image into another by manipulating pixels. It was widely popularized in music videos and movies during the 1990s. CAD (Computer-Aided Design), Toasting, and JIT (Just-In-Time compilation) are not related to visual transformation effects.

Burj Khalifa's height is 828 metres, making it the tallest building in the world. The other options (859m, 913m, 936m) are all incorrect heights that don't match the actual architectural record.

Albert Abraham Michelson, an American physicist, was the first American to receive a Nobel Prize when he won the Nobel Prize in Physics in 1907 for his precision optical instruments and measurements. Martin Luther King won later (1964), Bertrand Russell was British, and William Henry Bragg was British (shared Nobel with his son).

NASA began operations on October 1, 1958, following the passage of the National Aeronautics and Space Act earlier that year in response to the Soviet Union's launch of Sputnik. 1957 (Sputnik launch), 1959, and 1956 are incorrect.

The nine-banded armadillo is the only known animal besides humans that can naturally contract leprosy (Hansen's disease). This unique susceptibility makes them invaluable for leprosy research. Their low body temperature allows the leprosy-causing bacteria to grow, unlike in most other animals. Tigers, elk, and king cobras are not known to contract leprosy.