In a real-world environment, changing granularity requirements might dictate changes in primary key selection, and those changes might ultimately require the use of surrogate keys.
Explanation:
A surrogate key is a unique identity as an object or entity. It is used as an object in the database and as an entity in the modern world. Surrogate key is not a natural key hence it cannot be derived from application data.
Advantages of using surrogate key:
- They are unique
- They have uniform rules
- It allows unlimited values
- It stands the test of time
Answer:
Yes correct. Absolutely breathtaking. You should create poetry with your writing skills.
The GCSE Computing MOOC (created with Cambridge University Press and Raspberry Pi) can be used either as a course or a flexible teaching resource,
Answer: Snort
Explanation:Snort is a system which provides the service of the prevention of the intrusion. This system works as the open source for provision of the logging of packets and traffic analysis.
The functions in the snort are analysis of the protocol, content matching , searching etc. The main purpose of it is for the detection of the attack like stealth port ,CGI attacks etc.Other options are incorrect because they don't provides attack detection service.Thus the correct option is snort.
