Answer: What do you mean?
Answer:
c. StringBuilder
Explanation:
An alternative to the String class would be the StringBuilder Class. This class uses Strings as objects and allows you to mix and match different strings as well as adding, removing, implementing, and modifying strings themselves as though they were similar to an array. Unlike the string class StringBuilder allows you to modify and work with a combination of strings in the same piece of data as opposed to having various objects and copying pieces which would take up more memory.
The man utility is a console based program that displays manual pages of other utilities, so for fdisk, you would use man -k fdisk to search for fdisk related manuals
Answer:
Speakers.
Explanation: Cause they only output sound, and are devices, further more they are not used to output images, like how could speakers output images using sound? They can't.
This question has 2 answers that I can see.
The first one would be a Dial Up Modem. These devices allow (or allowed, since they're pretty much obsolete) a computer to communicate over the phone lines and access the internet.
The second option for an answer would be a DSL Modem/Router. In a sense, a DSL (Standing for Digital Service Line) is a bit of a predecessor to traditional Dial Up, using a digital telephone line (However not the frequencies used for voice) to connect a computer or set of computers together and to the internet.