answer

[Detriotlions]

You get a ticket from the “Data Entry Team” (Around 20 people), and it 
says at any given moment it seems around 1/3 can’t get into the “Data Entry Website”, but it’s not always the same 1/3. What are some possible reasons / what would you look for?

[Detriotlions]

	Question
Troubleshooting
	B13B8B3:B11B3:B16B3:B15B3:B14B3:B13B3:B12B3:B11B3:B10
	You get a ticket from the “Data Entry Team” (Around 20 people), and it says at any given moment it seems around 1/3 can’t get into the “Data Entry Website”, but it’s not always the same 1/3. What are some possible reasons / what would you look for?
	You get a pagerduty alert for disk usage on one of the nodes which is a centos based linux host at 3am in the morning. How would you troubleshoot and identify the root cause, what linux commands you would use? What would be your actions after finding the problem?
	Customer support call you saying that “customer said our website is really slow”, how are you going to troubleshoot that?
	A developer gave you a binary executable file, said run it on a server and  it will populate a bunch of directories/files under /data. However, it does not do what is expected, what could be the reason?
Operations
	If 10 tickets come into the system with the same priority how would you deal with them?
	What is the difference between a problem and an incident ticket?
Linux
	What is the difference between LVM and RAID?
	What services are required for PXE to work?
	What is an hypervisor?
	How can you check which process is listening on port 111?
Netwoking/Protocols
	What happens when I type google.com on my browser and hit enter? Go as much details as possible starting from client side.
	Whats the difference between A and AAAA dns records?
	Whats the default DNS port and protocol
	You are an IT manager of a big multinational company and you are asked  to provide a subdomain in the company’s TLD for one of the teams who would like to host an application. What are the questions you would ask that team to get the necessary info?
	Immediately after you perform the necessary actions in the previous question, you have tested the application and its working in California. However, they complain that their team member in China can not access the application using the domain name. What is the first problem that comes to mind? How would you troubleshoot?
	What is the difference between CDP and LLDP?
`	Why is UDP faster than TCP?
	Traceroute functions in one of several different modes - tcp, udp and icmp - to enumerate the hops along a given network path. Given that your target is a world accessible web server, which mode is most likely to reach the final host? Why?
	what will be a command to show OSPF neighbors?
	Interface on switch is suspended showing inability to receive LACP PDU’s, what might be a reason for that?
AWS/Cloud
	Why someone would want to use glacier vs. standard S3 bucket
	Whats the underlying transfer protocol for S3?
	Explain what is an AMI?
	What is the difference between snapshot and an AMI?
	How would you use AWS to serve a static website?
	How to determine if two files are identical?
	What infrastructure components will ensure vSphere ESXi high availability?
	What out of band access means?
	What is the fastest way to search files in RedHat OS?
	What needs to be done in order to route network in Linux?
Openstack
	are you familiar with Openstack? what level of familiarity you have/recent open stack projects/ recent open stack version you worked on?
	What storage integration with open stack did you recently worked on?
	what is the most common automation mechanism in open stack you are aware of?