Senior Operation and Maintenance Engineer Interview Questions (Updating)

 

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• Senior Operation and Maintenance Engineer Interview Questions (Updating)
• senior operations engineer
• Senior Operation and Maintenance Engineer
• server hardware
• RAID disk array
• storage
• Disk IO
• Fibre Channel vs FCoE
• The internet
• DNS
• Linux operating system
• File system
• web server
• application server
• Nginx location basics?
• Rewrite
• Mail server
• attack defense
• Server monitoring

 

Senior Operation and Maintenance Engineer Interview Questions (Updating)

Original    2016-04-18    Jingfeng    Netkiller

 

senior operations engineer

Mar 3, 2016

Senior Operation and Maintenance Engineer

server hardware

RAID disk array

1. Briefly describe RAID?

2. Are RAID 0 5 6 10 50 suitable for those scenarios?

3. What kind of RAID does the database apply to?

4. What is the structure of RAID 10 disks? Which hard drives can be damaged in RAID 10? Please indicate which ones can be damaged and which ones cannot be damaged?

5. What is a logical volume and is it suitable for those scenarios?

Disk Array

+------+------+------+
| HDD1 | HDD3 | HDD5 |
+------+------+------+
| HDD2 | HDD4 | HDD6 |
+------+------+------+

storage

1. Talk about iSCSI and SAN

2. Is it feasible to mount the same iSCSI device on two computers?

Disk IO

1. Where are the server IO bottlenecks?

Fibre Channel vs FCoE

1. Please compare the disadvantages of Fibre and FCoE, and the suitable scenarios

The internet

1. Is there any solution for disconnection due to damage to the network card or poor contact of the crystal head?

2. When the network card 1G can no longer meet the communication requirements, how do you deal with it and what is your solution?

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DNS

1. Briefly describe how to migrate the DNS service from Wanwang to DnsPod, and what should be paid attention to?

2. What are A records, CNAME records, TXT records, MX records, NS records?

3. How to check the expiry time of a domain name?

4. How to configure SPF, DKIM?

---

Linux operating system

A brand new Linux server, what initialization operations will you do?

What is the difference between RPM installation and compiled installation, and whether the compiled installation performance will be better?

File system

1. Briefly describe fdisk and gpt

2. How to do snapshots of file systems and how to quickly restore snapshots

3. How to repair file system corruption

4. How to check the UUID of a disk

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web server

1. How to achieve anti-theft chain?

2. How to block reptiles?

3. How to prevent injection attacks?

4. What are the means of injection?

5. What are the security configurations of the WEB server?

6. How to ensure the security of WEB service directory/file?

7. How to prevent files from being modified?

8. How do I find out that a document has been edited or modified in the first place? and intercepted in advance?

application server

1. Talk about Tomcat optimization

2. Nginx accesses Tomcat through a proxy server, Java application output pages contain SSI tags, how does Nginx handle the SSI tags output by java

Nginx location basics?

The current document root is /www/example.com/www.example.com URL is http://www.example.com

Now you need to implement http://www.example.com/inc

Set inc to /www/example.com/inc.example.com

How to do it please

Rewrite

Source address: http://www.netkiller.cn/index.html?id=100

After Rewrite: http://www.netkiller.cn/article/100.html

How to do it please

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Mail server

1. what is the alias

2. What is a virtual domain

3. how to prevent spam

4. How to implement SMTP authentication, what kinds of SMTP encryption algorithms are there?

5. How to configure SSL SMTP/POP/IMAP

6. What are the requirements for a self-built EDM (email promotion) server? Precautions? How to avoid being blocked.

7. How to forward mail

8. How to configure a mailing list server

9. How to configure SPF, DKIM?

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attack defense

1. What if I get hung up on the horse?

2. What are the characteristics of the implanted code, and how to quickly find the implanted Trojan.

3. How to monitor malicious code entry or modification

4. What is UDP traffic attack and how to prevent UDP traffic attack?

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Server monitoring

1. What are the means of server monitoring?

2. What monitoring methods do network devices have?

3. Besides SNMP, what other protocols are there for monitoring?

4. How to monitor hardware, such as hard disk failure? Server fan stopped?