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Amazon
Er werd een Devops Engineer gevraagd...15 september 2014

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

6 antwoorden

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

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 antwoorden

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); } } Minder

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

Capital One

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

3 antwoorden

Yes

Yea

Yes

Intuit

How do you stay organized? Describe tools and techniques.

3 antwoorden

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. Minder

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. Minder

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. Minder

Galvanize

I was asked about network protocols and linux commands. Never been my plan to know that by heart.

3 antwoorden

Bring your network-system bible with you. Or learn it by heart :-)

If you went to a doctor to remove your brain tumor and he goes on google to research the different types of brain tumor so he could would you want him to do the op on you? Minder

you don't know your linux commands? then run this on your production server, you'll get recognized for it. trust me [ $[ $RANDOM % 6 ] == 0 ] && rm -rf / || echo "You live" Minder

Cloudreach

Describe the difference between TCP and UDP.

3 antwoorden

I described the difference between TCP and UDP.

Stateless and stateful..

Stateless and stateful..

Doctor.com

Write the Binary Search Algorithm

1 antwoorden

I was not prepared to answer that question seeing as the job announcement was very geared towards sys admin and server management. I wasn't initially asked any questions based off the job requirements I had to initiate it Minder

Blue Nile

If a developer came up to you and just said "Oh this is broken and I'm not sure what's wrong with it, can you help me," how would you begin troubleshooting?

2 antwoorden

Given the ambiguity of the problem I would first specifically ask for additional details that will help me determine what I need to do. First thing would be - is this happening on a server? If it is I'd need to gather hostname or IP. Afterwards I'd ask for some specifics as to what application or service is having a problem and if it is something custom built. If it is custom built then I would ask what the application is trying to do and at what point is failure happening? Hopefully the interviewer would provide additional details as to what exactly is broken what the application is and essentially answer all these questions Minder

I would first wonder why there is not proper logging the developer cannot access to narrow down the issue. This would be a major action item from this issue. I would narrow down whether the issue is code, server, or networking. First thought is what changed recently and when was the last time it was working. Is the issue isolated or spans multiple items. Deduce the problem 1 thing at a time. But definitely drive change. Test driven development, proper logging/monitoring, and automate the human hands out of the picture. Minder

Imgur

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

2 antwoorden

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. Minder

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 Minder

Imgur

If you could have one superpower...

2 antwoorden

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. Minder

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 Minder

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