Answer:
Depending on exactly what they mean by read and write, both A and D are valid. In fact, if you read that as "read or write" as being a logical OR and not the logical AND that the sentence probably intends, then all four answers could be correct.
What they probably mean to say though is "..... is used as a read/write storage medium", in which case A is the correct answer.
A. Data can be written to or read from a CD. This is probably the "right" answer
B. A human can "read" data from a Visual Display Unit, and the computer "write" it. That of course is not the intended meaning though.
C. Data can be read from Read Only Memory, but not written to.
D. Data can be both read and written to Random Access Memory, but not retained after the computer is powered off.
Answer:
A key field is used to uniquely identify each record for retrieval or manipulation.
Explanation:
In a database there are many, having similar entities. So in order to differentiate each entity from other we need to set a key field among all the field which is always unique for each entity.
For example:
In a database of a company having data about its employees, the key field might be their ID. As some employees can have same names, addresses, phone numbers but cannot have the same ID.
Answer: Websites
Explanation: Adobe Dreamweaver CC is a web design and an Integrated Development Environment (IDE) application that is used to develop and design websites.
A, because if not, there is nothing to say it exsists
U can use Bluetooth connect your computer to the android. <span />
