Perguntas de entrevista de Devops engineer

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Amazon
Pergunta feita para Devops Engineer...15 de setembro de 2014

How do you know how much memory your java application is taking on Linux?

6 respostas

pmap or top is probably the simplest. Just be sure not to confuse virtual memory with physical. Menos

jps |awk "{print $1}" | xargs -L 1 ps -ef -o %mem

ps aux | grep -i

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H2O.ai

A programming question ? Related to excel spread sheet. The question goes this way. columns will go infinitely : A , B.......................Z,AA,AB............AZ,AAA................ZZZZ so interviewer wanted me to choose a programming language of choice and pass the column name and print corresponding column number. A - 1 B- 2 Z - 26 AA - 27 1 + 26 AZA - 1 + 26 + 26 +

3 respostas

I tried solving it with python I gave some solution it didn't worked well.

public class Column { static int getColumnPosition(String cell) { int columnposition = 1; int row = 0; int j = 0; char[] cellAsArray = cell.toCharArray(); char column = cellAsArray[cellAsArray.length - 1]; for (int i=0; i = 'A' && letter <= 'Z') { letterPosition += 1 + letter - 'A'; } return letterPosition; } public static void main(String[] args) { int position = getColumnPosition("ZZ"); System.out.println("Position is " +position); } } Menos

num = 0 for char in list('AZA'): num = num + ord(char) - ord('A') + 1 return num Menos

Capital One

Are you willing to work on 3AM Production Support without hesitation ?

3 respostas

Yes

Yea

Yes

Intuit

How do you stay organized? Describe tools and techniques.

3 respostas

I use Outlook for email, contacts, calendar, and tasks in the work environment, and I use OneNote to collect and search through important notes. With my smartphone I use Google's calendar, gmail, and search. Menos

Trello for managing/limiting work in progress; focusing on one task at a time. Don't use email at all if you can help it. Use Slack for team communication as it links with Trello effectively. Keep all of your code in GitHub and commit+push often to track changes. Don't be someone responsible for releasing software; be someone who enables teams to release via services or automation you provide. Work hard to keep from being a bottleneck or gatekeeper of environments. Don't keep secrets or build silos of knowledge. The mindset you adopt will enable you to uplift others and enable better communication across your team and organization. Menos

Choose carefully what you put your attention on and resist the urge to multitask. Choose your top 2 or 3 skill areas and focus on cultivating them. Tools like Outlook are not helpful for DevOps. Shut it off for long periods of time each day. Menos

Cloudreach

Describe the difference between TCP and UDP.

3 respostas

I described the difference between TCP and UDP.

Stateless and stateful..

Stateless and stateful..

CloudCover

Interview question were fair with modern technical question for the Devops profile.

2 respostas

After completing all the 3 rounds. they told me that they've a cultural check round. which infact was more like a technical discussion again. And finally HR mailed saying you've passed all the tests and discussed about CTC process and asked for the formal documents. Then the process of regular follow-up starts. And HR told me they want to have one more hangouts round which never happened. Menos

Yes....I have the same experience .they are not sure of how many rounds should they have . And how to conclude. They lack aquisition process Menos

Imgur

If you could have one superpower...

2 respostas

Be clever when responding. Whether it's the ability to fly, see into the future or leap over tall buildings in a single bound, you should always make a connection to your professional contributions. The superpower you choose need to relate back to an organization or how your skills would benefit others. For example, the ability to read someone's mind can help you create better solutions for a client. Menos

Meh. These questions always freak me out a little bit. I don't think it was considered seriously, instead looking for someone with a little bit of life in them. Typical programmer trap though - flying is a subset of teleportation :P Menos

Imgur

How would you design a presence (ie: friends online list) system?

2 respostas

K/V stores, queues, distributed systems, etc etc. If you don't have an opinion on this, you haven't been on-call for a chat system before :P Menos

In these sorts of interviews you really need to drill down and understand what the interviewer is looking for. A good way to simulate a real interview experience is to do a mock with one of the Imgur Devops Engineer experts on Prepfully, rated super strongly on TrustPilot... prepfully.com/practice-interviews Menos

Imgur

I was asked to to participate in several thought experiments. They were cleverly designed for you to showcase your skillset.

2 respostas

I really just provided honest input during the thought experiments, and this demonstrated my proficiency with the concepts and software involved in the thought experiments. Menos

Through questions like this, interviewers are mostly trying to test your skillset (and its relevance to the role) as robustly as possible, so be prepared for multiple offshoots and followups. It could be a useful exercise to do mocks with friends or colleagues in Imgur to get a real sense of what the interview is actually like. Alternatively Prepfully has a ton of Imgur Senior DevOps Engineer experts who provide mock interviews for a pretty reasonable amount. prepfully.com/practice-interviews Menos

Elinvar

How can you have 3 usable IPs in a /30 subnet

2 respostas

cancel the BC and use MAC table

32-30=2, 2^2=4, 4-2=2, the answer is no, max. 2 addresses

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