1)Hacker is a person, a new generation, one might even say, a new branch of the evolutionary development of man
2)Hackers are bad and good. Bad hackers are usually involved in petty hooliganism, and for good hacker hacker craft - first of all, the style of life.
3)Hackers called, for example, Linus Torvalds, Richard lately, Larry wall, Donald Knuth, Bjorn Eric Raymond and the other founders of open systems world level. In Russia a striking example of a hacker is Chris Kasperski.
4)a Hacker(literally) - someone who makes furniture with an axe
1 cats are not friends of dogs.
2 is
3 have
4 he is not a rich man
5 they are in the theatre now
6 is
7 has
Are books my best friends?
What are my best friends?
Does my friend have many problems?
How many problems does my friend have?