Answer:
Explanation:
Duplicate tuples are not allowed in a relation because the specifications of the constraints of the regional integrity are violated, especially the main constraint that states that there can be no identical values for the attributes of two tuples at any database relation state.
Also, duplicate tuples are not allowed in a relation due to the fact that they lead to redundancy of the data base which in turn, slowing down the speed of the database when data processing such as inserting, querying, updating, deleting, etc are being performed.
One gallon is 3.7854 liter so 4 liters are more than one gallon.
Answer:
A) a device that sends data to the receiving device
Explanation:
Answer:
False
Explanation:
Input/output devices do NOT transfer information in only one direction.
Input devices receives the information while the output devices sends the information. The direction of the information being transferred between the input and output is NOT just in one direction.
Examples of input devices are keyboard, mouse, joy stick, scanner, etc.,
Examples of output devices are monitor (LED, LCD, CRT etc), printers (all types), plotters, projector, speaker(s), head phone, etc.
