How to prepare for a system administrator interview?

Question

Computer networks

I welcome everyone! I'm going to social services soon, I want to improve my knowledge. And I turn to you with the following questions:

• What basic skills should a future system administrator have to pass an interview?
  
• What are the main questions asked in an interview?
  

The meaning, I think, is clear.
I would really appreciate your help and advice!

Answer 1

I occasionally interview for this position. I can recommend not to write in the resume what you don't know - it's misleading... but if they ask deeper?)
Initially, I ask about basic questions and try to find out the depth of knowledge. For example, a person knows what a dns is, maybe even the history / background of its appearance, but he does not know what records of different types exist and what they do.
For example, a person wrote what AD is in a resume - I will ask, among other things, the roles of FSMO.
For example, I will ask about the device of the file system, then I will ask about what index descriptors are, how symlinks differ from hardlinks, how a file is deleted, etc.
I will definitely ask basic questions about the network, the osi model, what tcp and udp packets consist of.
Most questions are not answered, but if you need to pull cables and configure routers and get connected, this is not a problem. If he wants to grow, he will understand. I also evaluate candidates, you need to understand that you are not the only one who comes to the interview.
But if they don’t answer me what dns is and can’t explain that 10.0.0.4 and 10.0.1.7 (with a /24 mask) are different subnets, then it’s such a thing - after that about all sorts of containers, orchestrators, monitoring and others Complex services do not make sense to ask at all.

Answer 2

OSI model -classic

Answer 3

In my experience: - hardware, network protocols and services, everything that is written
in the resume, work experience
negative impression)
For example, if a person cannot explain how dns works, a netmask, or how a router differs from a switch, then no matter how much further you don’t want to ask anything.
There is no need to talk about what you have no idea about, if you are not familiar with something - this is normal, if you start to "swim" in the topic, and the interviewee usually knows what he is asking about, then this is not right away.
Usually, when hiring an employee, the company is trying to solve some kind of “headache”, and if you convince yourself that you can handle it, this will significantly increase your chances of employment.

Answer 4

No way.
Dig questions - you will swim, because understanding of the issue will be superficial.
A good option is to walk through interviews and listen to what they ask in your direction.

Answer 5

Personally, the test interview helped me a lot. I went through Skype, then asked questions. I was clearly pointed out my mistakes and given detailed answers to the employer's supposed questions. Here https://jobhacking.ru/sobesedovanie you can write a resume correctly. It was very useful for me. I received the position.