Explanation:
This is because the SEO might not be able to access the media items wherever they are, or they could be deleted, or the media items may not be compatible with the SEO. It could also help to have alternatives for accessibility purposes. Therefore, it is important for the SEO to have alternatives to display incase a media item is unable to display for whatever reason.
Answer:
Correct answer is option B (The reason for using supertypes is to minimize the number of nulls and to minimize the likelihood of redundant relationships)
Explanation:
Entity supertype
A entity supertype is a generic entity type which is related with one or more subtypes.
Use of entity supertype:
The reason for using entity supertype is to reduce redundant relationships and it is also used to minimize the number of nulls.
Answer: parallel processing
Explanation:
Parallel processing is the process by which the processor has the capacity to execute parallel instruction at the same time. This is possible only by assigning the different task to the different cores present in the cpu. So a cpu with multiple cores are able to process multiple task as the same time parallel.
The GPS device in an automobile uses the satellite communication channel. GPS stands for Global Positioning System. It is based on the satellite navigation system that consists of a number of satellites. This is being used to loacate places and determine exact location, time and speed.
