B false data does not only have to be facts
<u>I will advise Sara to do research about the problem on the Internet.</u>
<u>Explanation</u>:
Internet is a network that helps in connecting one computer with other globally. Communication between the computers is possible until the computers are connected with to the Internet. Internet helps in getting information from any computer and interacts with the users of the computer.
Sara finds some issue with her computer. She was troubleshooting, but she could not find the exact problem. She was not sure with the problem that she found. It is better for Sara to do research about her problem on Internet and find the solution.
Answer:
The correct option is C: For objects to communicate effectively with one another, each must know how the other object is implemented.
Explanation:
For effective communication of objects with each other, there is no need for each object to know how the other object is implemented. The rules for communication are already defined, and hence you do not have to know, as details of implementation are hidden. Hence the only false statement from the options is C.
Answer:
The answer is provided in the form of explanation
Explanation:
A page fault occurs means that the required page is not in main memory. First OS check for
page in the cache memory, if the page is present then retrieved but if not present then check for
page in main memory and if the page is not present here too then it searches for page in hard
drive. To calculate the expected time, the following formula is used:
Cache hit ratio = 95% = 0.95
Cache miss ratio = 5% = 0.05
Cache access time = 2 millisecond
The average access time of hard drive = 30 milliseconds
Expected time = Hit ratio (cache access time +memory access time) + Miss ratio (cache
access time + 2 * memory access time)
= 0.95 (2+30) + 0.05 (2+2*30)
= 0.95 (32) + 0.05(62)
=30.4 + 3.1
= 33.5 millisecond
Expected time = cache hit ratio * cache access time + (1 – hit ratio) * cache miss ratio
= 0.95*2+(1-0.95)*0.05
= 1.9025
