Answer:
A variable declaration is a name given to a memory location. It is the basic unit of storage in a program.
Answer:
The answer for B is 10% and for C is 40%.
Explanation:
To get the percentage for B you take the the frequecy of students taking 2 courses (5) and multiply it by 100 then you divide it by whole number of students.
For C you do the after adding the number of students taking 1 or 2 courses (20).
Answer:
<em>DBMS Performance
</em>
Explanation:
Database tuning <em>defines a range of activities that are used to maximize and homogenize a database's output.</em>
This typically coincides with query tuning, but applies to database file layout, DBMS software selection, and database environment setup (operating system, CPU).
Database tuning helps to optimize the use of machine resources in order to carry out work as efficiently and quickly as possible.
Many systems are built to handle their use of system resources, but there is still plenty of space for enhancing their performance by tailoring their server and DBMS settings and configuration.
A network computer depend on on a centralized computer for most of its services. It can consequently have a minimal operating system while a personal computer on the other hand has to be proficient of on condition that all of the required functionality in a detached manner without depending on a centralized manner. Scenarios where administrative costs are high and where sharing leads to more efficient use of resources are exactly those settings where network computers are preferred.
It needs an Operating System like a cable or something that will help it operate look for more and double check