Questions

Candidate Key – A Candidate Key can be any column or a combination of columns that can qualify as unique key in database. There can be multiple Candidate Keys in one table. Each Candidate Key can qualify as Primary Key. 

Primary Key – A Primary Key is a column or a combination of columns that uniquely identify a record. Only one Candidate Key can be Primary Key.

• One needs to be very careful in selecting the Primary Key as an incorrect selection can adversely impact the database architect and future normalization. For a Candidate Key to qualify as a Primary Key, it should be Non-NULL and unique in any domain.

There are 13 colonies and are ruled by England.

The farthest north colony - Massachusetts

The farthest south colony - Georgia

The oldest colony - Virginia

The colony between the 2 parts of Massachusetts - New Hampshire

A bureaucracy is a way of administratively organizing large numbers of people who need to work together.

The term bureaucracy literally means "rule by desks or offices".

Organizations in the public and private sector, including universities and governments, rely on bureaucracies to function.

A metalloid is an element with properties between metals and non metals or the mix of both.

The six metalloids are arsenic, silicon, germanium, boron, antimony and tellurium.

Hence, silicon is the only metalloid in the given list.

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