The user needs to complete the entire disk surface first before starting another surface.
Explanation:
When you are using a multiple disk storage system to write the data the disk automatically writes the disk based on the algorithm for better efficiency and availability of the disk space.
hence when you are recording a data on a multiple disk storage system, it is recommended to fill the complete disk surface initially before you start the another surface to record the data.
Answer:
Join
Explanation:
Five basic set operators in relational algebra are as follows:
- Selection - tuple selection
- Projection - extract columns
- Cartesian product - cross product of relations
- Set union - union of two relations
- Set difference - minus operation on two relations
As we can see, Join is not part of the basic set operations but it is implemented using the Cartesian Product operator.
Answer:
Filtering procedure provides an essay and convenient way to visualize or work only with the data we desire without needing to delete those we do not need at that moment.
Filter allows you to view only the information you want to see. Only the required information is displayed at that moment once the filter criteria has been checked.
Filter temporarily hides rows of data that you do not need to view. Rows of data which aren't needed at the moment are temporarily hidden in other to allow user concentrate on the needed data.
Filter allows you to filter text and numeric data. Filtering allows for different filtering criteria, if the user requires working or viewing only on text or numeric data, it is possible with spreadsheet filter.
Explanation:
Filter allows you to view only the information you want to see.
Filter temporarily hides rows of data that you do not need to view
Filter allows you to filter text and numeric data.
