iOS face question set

　　Now winter vacation time at home can not knock code, but I always want to find something to do, back to think about the start of employment, so inevitably to participate in the interview, and then began to look at the examination and exploration of the question set, this afternoon I saw part of the face of the question feeling is quite practical, so the future is to insist on it, Hope and I like friends, all have to make good use of this holiday, to review the summary of more useful things to see, in order to avoid the rush, I first here and you share what I see today's knowledge point bar, because can not use the software, so today can not be on the code, hope that we haihan Oh!

Because it is out of our common learning purposes, so today I am here on the first list of topics, are some seemingly very simple things, but it is we have to pay attention to, hope to see the friends can take a good look, maybe we will use the Oh, haha, the title is as follows:

　　Part One, C language partial face question

　　1. How to refer to a global variable that has already been defined

2. What is the difference between a static global variable and a normal global variable? What is the difference between a static local variable and a normal local variable? What is the difference between a static function and a normal function?

3, the local variables of the program exist in (the stack), the global variable exists in (static zone), the dynamic request data exists in (heap).

4. Differences between processes and threads

5. Differences between Heap and stack

6. What is precompilation and when to precompile

7. What is the meaning of the keyword static?

8. What is the meaning of the keyword const

9, for the understanding of the const

Originally wanted to be directly to the answer, but also carefully think, if directly give the answer, maybe friends see just a look, and no real to think, that is not as good as not to see it, so I just gave the topic, it is hoped that the heart or feel useful friends see, if it is useful, Can think well, actually these problems seem very simple, but the real interview in the time, it will not be so simple, because we want to use more formal words to say, once we can find a good job, can get the recognition of the interviewer, so also please think about it, if you feel there is any doubt , we can write in the following, or write their own answers, as for the correct answer I will be in tomorrow's blog for everyone to present, of course, this is not suspense, I really hope that you can leave enough time to think, well, today's blog is here, tomorrow do not forget to see the answer Oh, A friend in doubt can comment oh, see must return, thank you, Bye, tomorrow at the same time goodbye.

iOS face question set