Answer:
Both C++ and Pascal uses objects.
The answer is A1.
The columns are arranged alphabetically, and the rows are ordered numerically. The cell address states the column, a letter, followed by the row, a number. The first cell address, the top-left cell of the sheet, is A1
Advantages: Nuclear energy has the ability to produce electricity without greenhouse gas emissions. It produces electricity without pollution
Disadvantages: The nuclear weapons threats. Some reactors produce plutonium which can be used to make nuclear weapons
Answer:
b. white-hat hacker
Explanation:
A White-hat Hacker, also known as an Ethical Hacker is an information security specialist, known for performing penetration testing and checks in search for information and communications system's vulnerabilities on demand for his/her clients.
These efforts are meant to find security risks before someone else does, who could cause any kind of damage to the systems or unauthorized access to sensitive information
Answer:
b. foreign key
Explanation:
In the database world, a foreign key is a field on one table and a primary key for another table. The purpose of a foreign key is to provide linkages between two or more tables. Given two tables A and B, and making A the point of reference, a primary key is a field that is unique in A while a foreign key is unique in B.
On another hand, a composite primary key is a combination of two or more fields/columns on database table that can be used to uniquely identify each row in the table.
In the database lingua, what we have is a unique key not a distinct key, though the two words are similar in meaning.
A duplicate key is used when an information may be repeatedly entered on a table.
So the correct option is a foreign key.
