Why do you have to learn computer operating system?
If you don’t have a good foundation in computer science, if you just learn Java, Android and other application courses, you are equivalent to a tourist traveling to a strange city, and you can only see the appearance of various high-rise buildings. If you learn these basic computer knowledge in depth, then you are a real architectural designer, and you can directly see through the design structure and architectural essence of various high-rise buildings through the appearance.
And now major factories will ask a lot of interview questions about the operating system during interviews. I remember that when I interviewed JD.com, I was almost autistic. The interviewer kept asking me about the operating system. . I thought it would be over after just a few questions, but I was asked ten or twenty questions about the operating system in succession, who can resist this! Fortunately, I finally got an offer.
So how to get rid of the half-bucket state and lay the foundation of the computer operating system?
In fact, I was half-baked at that time. As for why I was able to enter a big factory like JD.com, it was entirely the result of vigorous review at home. At that time, the trustee obtained a complete set of knowledge collection of the operating system from Ali, which contained 150,000 words and 400 color pictures, and explained the underlying knowledge of computers in the clearest and most visible way. If your foundation is not that good, your psychological feeling after reading it must be like this:
Since it is a complete collection of operating system knowledge, it must not only have basic things, but also a lot of practical cases in the book. Take out this information before the interview and brush it up, and you will have a lot more confidence when you interview a big factory It is said that the interviewers of major factories will use this information as a reference when they ask questions ), and many readers expressed their gratitude for this collection of knowledge, so they got offers from first-line manufacturers.
Let's take a look at the general framework of the operating system:
(First look at which piece of knowledge you have is relatively weak)
Next, it’s time to share the details of this manual:
Note: Due to the length of the article, I will only show part of the content and screenshots of the catalog. Friends in need can help to pay attention to the private message and send [111] to get the full version of the pdf.
Graphical 30 HTTP common interview questions
A set of 45 pictures takes away the family bucket of IP basic knowledge
Illustrate how ping works, let me see how many 6 you use for ping?
What happens after you type the URL?
Asked thousands of times! 40 illustrated TCP three-way handshake and four-way handshake interview questions
Don't worry about TCP retransmission, sliding window, flow control, congestion control anymore!
Who said TCP can't see it? I use Wireshark to let you "see"
What happens when the TCP semi-connection queue and full connection queue are full? How should we deal with it?
Interviewer: Change! This person doesn't even understand the parameters of TCP
at last
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