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:
E. Traditional leaders in communication have lost some control over information
Explanation:
Due to the quick development of new technologies like Internet, cable etc, traditional leaders in communication have lost some of their control over information. This means that the technological advancement is disruptive for traditional leaders. Following examples are given to elaborate the consequences of advancement in new technology in digital era.
With the establishment of new channels like CNN, Fox News and internet bloggers, the old television network news shows like ABC, NBC lost their audiences.
Email technology has taken on some of the postal service's responsibilities and outperforms attempts to control communication outside national borders. This replaced the postal mail which used to take months to reach the destination.
The Internet and social media websites are transforming the way in which we access and interact with media culture. Before internet most people would watch popular TV shows in at the time they originally aired it. This scheduling gave common media interactions at specific times within our society. We still watch these TV shows but now we watch them at our own ease through websites. Using You tube we can upload our own media instead of viewing mainstream television.
By email or publishing on the internet, I hope that helps!
Answer:
Written in Python
name = input("Name: ")
wageHours = int(input("Hours: "))
regPay = float(input("Wages: "))
if wageHours >= 60:
->total = (wageHours - 60) * 2 * regPay + 20 * 1.5 * regPay + regPay * 40
else:
->total = wageHours * regPay
print(name)
print(wageHours)
print(regPay)
print(total)
Explanation:
The program is self-explanatory.
However,
On line 4, the program checks if wageHours is greater than 60.
If yes, the corresponding wage is calculated.
On line 6, if workHours is not up to 60, the total wages is calculated by multiplying workHours by regPay, since there's no provision for how to calculate total wages for hours less than 60
The required details is printed afterwards
Note that -> represents indentation
Answer:
They are both ways to identify assets (e.g., persons, animals, objects).
Explanation:
A barcode is a bit of information (usually a number) printed as a line or block pattern on a surface (e.g., a sticker).
An RFID is a bit of computer memory with an antenna.
Both can be read with the appropriate scanner device.
