In Many Database Systems, Some "Deleted" Records Are Not Physically

question 28

True/False

In many database systems, some "deleted" records are not physically removed, but they are just marked as deleted so that they will not be used to process active records.

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Definitions:

NADH

Nicotinamide adenine dinucleotide (NADH) is a coenzyme found in all living cells that is involved in redox reactions, carrying electrons from one reaction to another.

Oxygen

A chemical element (O) that is critical for life, forming about 21% of the Earth's atmosphere and required for cellular respiration in most organisms.

Substrate-Level Phosphorylation

A metabolic process where a phosphate group is directly transferred from a substrate to ADP, forming ATP, without the need for an electron transport chain.

Aerobic Respiration

A metabolic process in which cells convert glucose and oxygen into energy, carbon dioxide, and water.