Which of the following persons invented the punch card ma...
Which of the following persons invented the punch card machine?
Blaise Pascal
Gottfried Leibniz
J. Prosper Eckert
Dr. Herman Hollerith
Correct answer is D
No explanation has been provided for this answer.
Which of the following file organization requires a primary key? ...
A novice is discouraged from opening the CRT monitor for maintenance because ...
A file kept in case of an accident or natural disaster is called ...
Companies that provide internet access are referred to as ...
In relational model, a tuple is a ...
The protection of database against compromise is known as ...