Questions

A candidate key is a column, or set of columns, in a table that can uniquely identify any database record without referring to any other data. Each table may have one or more candidate keys, but one candidate key is unique, and it is called the primary key.

When we enter a URL such as google.com then It searches through local DNS cache, if nothing is there, it queries the ISP's DNS server to resolve the URL.

Burning gasoline is the only process that involving in a chemical change in the given options. A chemical change is a change in the starting substances that are called reactants from the formed new substances that are called products. 

Fructose or Levulose is the monosaccharide that is responsible for the sweet taste of fruit. 

Monosaccharides are the simplest of all sugars, contain at least three carbon atoms, and are the building blocks of all carbohydrates.

Money spent by the government on government programs such as road work, electricity work, manhole, etc... that are aiming to contribute to the nation's social welfare in long and short term are referred to as Goverment Expenditures.

Separation of an employee exists when the service of an employee comes to an end because of one reason or other. "Separation of employment" refers broadly to the process of managing the termination of employment. It is a sensitive issue for any organization. 

Types of separation:

1) Volunntary:

a) Resignation
b) Job abandonment
c) Retirement

2) Involuntary:

a) Layoff
b) Dismissal
c) Plant closure
d) Death or Disability.