Answer: system administrator
Explanation:
The responsibilities of the database system administrator are as follows:
1. Should be able to identify the needs of the different users and their associated databases and install software as and when required.
2. making sure that the database is functionally efficiently as well as the associated software's.
3. Updation of the software and their maintenance along with the databases.
4. Backing and restoring of the databases in situation of different data loss hazards.
Answer:B. Are used to create, organize, and manage databases
Explanation: Database management system (DBMS) is a computer software which is used to collect, analyse or evaluate and retrieve data from a database. It is essential to the flow of businesses or other activities of an organisation.
Examples of database management system softwares MICROSOFT ACCESS,FOXPRO,ORACLE etc all this are effective as it helps to manipulate the data structure,field names,the file formats etc.
"giga" is the prefix denoting "billion," so gigahertz means "billion hertz"
Therefore answer is One Billion
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