Answer:
6 address lines
Explanation:
The computation of the number of address lines needed is shown below:
Given that
Total memory = 64MB
= 
=
Also we know that in 1MB RAM the number of chips is 6
So, the number of address lines is 
i..e 26 address lines
And, the size of one chip is equivalent to 1 MB i.e. 
For a single 1MB chips of RAM, the number of address lines is
Therefore 6 address lines needed
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Answer:
B
Explanation:
An authentication server server tracks who is logging on to the network as well as which services on the network are available to each user. It also does the job of providing a network service that applications can use to authenticate the credentials, that are oftentimes account names and passwords, of their users. Authentication server is also used as the basis for authorization.
Answer:
Option (b) is the correct and suitable answer for the above question.
Explanation:
The printer is a hardware which is used to convert the soft copy of an information to a printed copy (Hard copy) of information.
To use printer hardware a computer system needs a printer driver which is used to do the conversion from soft copy to a hard copy. Hardware printer uses only for the purpose to print the copy.
The option b says that the printer driver is used to convert the document into the form of that document which the printer can understand easily. It means conversion from soft copy to hard copy. Hence it is the right option.
The reason behind the other option which is not valid because--
Option a says that the printer driver is a code but it is a software.
Option c says that the printer driver is an interface but it is a software.
Option d says that the printer driver is a cache but it is a software.
