Answer:
Basically it creates a unique identifier for each row in your table and that can help you link your table to other tables using primary key as link
Explanation:
"Primary key allows you to create a unique identifier for each row in your table. It is important because it helps you link your table to other tables (relationships) using primary key as links."
Answer:
B.add.
Explanation:
boolean add(element)
The add method in java inserts an element in the vector.It's return type is Boolean it returns true if the element is successfully inserted in the vector and false if the operation is unsuccessful.There is no Push operation in vector.Hence we conclude that the answer is add.
1. An organisation that maintains a gateway to the internet and rent access to customers on a per use of subscription basis is called INTERNET SERVICE PROVIDER [ISP]. Internet service providers are of various forms, it can be commercially or privately owned, it can also be owned by a community. The internet access provided by ISP can be inform of cable, DSL or dial up. ISP provide other services such as website building and virtual hosting.
2. Internet protocol [IP] refers to a set of rules that guide the format of data sent over the internet, it is the method by which data is sent over the internet from one computer to another computer. Each computer that is linked to the internet has a unique IP address by which it is identified and distinguished from all other computers on the internet.
Answer:
C. Inaccurate and misleading data can be more easily disseminated to scientific researchers.
Explanation:
The above one is certainly the correct option. We know these kinds of the database as an open database, and these are available for all on the internet. The best example is the World Bank database, Census.org is also a good example. All these databases are a huge collection of data sets with meaningful data. The inaccurate and misleading data is never thought to be spread among the scientific researchers easily as it is not good for research, and requires a huge level of data cleaning. Hence, C. is the correct option here as it is not an advantage.
