Hierarchal Databases

question 111

Multiple Choice

Hierarchal databases:

• A)Are effective in retrieving records without explicit linkages.
• B)Are efficient in processing large volumes of transactions with explicit linkages.
• C)Do not require built-in linkages, they can be created with queries.
• D)Do not require record pointers.

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Definitions:

DC

Direct Current, a type of electrical current where the flow of electric charge is in a constant direction, contrasted with alternating current (AC).

AC

Alternating Current, a type of electrical current in which the flow of electric charge periodically reverses direction.

XIC Instruction

In ladder logic and PLC programming, the "Examine if Closed" instruction that checks if a particular condition is true (i.e., if a contact is closed).

True

A logical or Boolean value indicating affirmative or confirmation, often represented digitally as '1' in binary.