19 Millet network operation and maintenance engineer written test real problem

Topic 1: There are 100 picture files, their addresses are http://down.xiaomi.com/img/1.pnghttp://down.xiaomi.com/img/2.png ... Go to http://down.xiaomi.com/img/100.png bulk download these 100 image files and find out which files are larger than 500KB.

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Topic 2: The contents of a text file Info.txt are as follows: Aa,201zz,502bb,1ee,42 each line is separated by commas, where the second column is a number, and the file is sorted from large to small by the second column number.

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Topic 3: Check if the current Linux server is listening on port 80, if you are listening, find out its process ID and end the process.

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Topic 4: Use the Curl or wget command to get header information for the HTTP service.

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Topic 5: On the Linux user account, the following statement is correct: a. The user's password is stored in clear text in the/etc/passwd file B. User's password, is stored in ciphertext form in the/etc/passwd file c. User's password, is stored in ciphertext form in the/ D. In the Etc/shadow file, when the user logs in, the user's password is compared with the saved password.

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Topic 6: For a hard disk array consisting of N hard drives, which of the following is wrong: A.raid1 reads data faster than RAID5 compared to RAID5 b.raid1 RAID5 disk space utilization is higher C.RAID1 the (N-1) block disk is damaged in the case of RAID5 Case, does not affect the integrity of the data d.raid0 compared to RAID1, RAID5, the fastest read and write speed

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Topic 7: Load balancing, what do you know about common software? Please write at least three or more, and evaluate each of the shortcomings.

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Topic 8: Executing the time sleep 2, the output is as follows: Real 0m2.003suser 0m0.004ssys 0m0.000s please indicate the meaning and difference of the real, user, sys three.

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Title 9:nginx The meaning of last, break, redirect, permanent in rewrite rules.

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Topic 10:web The difference between the service cookies and the session.

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What is the difference between the topic 11:http 1.0 and HTTP 1.1? What are the major changes or advantages of HTTP 2.0?

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Part II: Security Section

Topic 12: Please list Common Web security issues (not less than three), explain its principle, harm.

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Topic 13: Please list common Dos attack types, and introduce their principles and defense methods separately.

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Topic 14: The server is compromised, as a security manager, what should you do with it?

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Part Three: Network part

Topic 15: Please briefly describe the three-time handshake process for TCP.

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Topic 16: The discovery system has a large number of time_wait, analysis of the reasons and put forward more than three optimization recommendations.

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Part IV: Python section

The similarities and differences between the topic 17:xrange and range.

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Topic 18: Lists A and B, using Python to quickly get common elements in a and B.

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Topic 19: There are 20 servers, need to echo "123" on all machines, and require parallel operation of 5 servers, use Python or shell to write the relevant code.

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19 Millet network operation and maintenance engineer written test real problem