Answer:
Business Process Managment.
Software Products.
Engineering Research and Development
Answer:
Interference.
Explanation:
As the user is communicating with their friend through the mobile, most of their interaction is interrupted by the noise of an airplane flying at low hight. Instantly afterward, the user's mobile phone rang, disrupting the communication once more.
So, according to the following scenario both of those are examples of interference.
Answer:

Explanation:
Given Information:







There are 3 possible cases
1. Location of reference word is in cache

2. Location of reference word is not in cache but in main memory

3. Location of reference word is neither in cache nor in main memory


The average time required to access a referenced word on this system is simply the sum of above 3 cases

If I'm not mistaken firewalls should be enough as now the automatically back up all data