Which of the following statements are generally true?

1. memory hierarchies take advantage of temporal locality.
2. on a read, the value returned depends on which blocks are in the cache.
3. most of the cost of the memory hierarchy is at the highest level.
4. most of the capacity of the memory hierarchy is at the lowest level

1. which of the following is a search engine? a) mozilla firefox b)internet explorer c)google d)safari 2. which of the following statements is true? a) all search engines will provide the same results when you enter the same query. b) all search engines use the same amount of advertisements. c) some search engines are also browsers. d) search engines often provide different results, even when you enter the same query.