SRE Interview Questions 4
1. How SSL Certificate works? Give some more details on certificates and https.
2. Can we use single SSL certificate for on shared hosting where, we have multiple domain that is running on a single public IP address.
3. Can you please tell few Dns records types.
4. What is the difference between exec() and fork()
5. Lets say I have a host with 8GB of RAM and one of my application can grow upto 5GB of memory use, and as per my application in some time it do a scp call for some data receive/transfer. But some time its don't work. On the Log it says the can't start the scp. What can be the issue and what type of Architectural decision you will do for this kind of the issue.
6. What is zfs and zpool?
7. what is block and what is chunk?
8. What is the linux boot process?
9. One of the developer said that today my application is working slow, what all you will check for resolve this?
10. Site is slow, what all you will do to resolve this ?
11. What all you will do to fine tune a mysql db?
12. How you can find what are the slow query on a mysql db.
13. How you will find how many connection is there at the mysql?
14. What is the difference between different type of file-systems [ ext3 or ext4 ] example?
15. How DNS works?
16. How the nagios NRPE talk to the nagios Server.
Nagios <-> NRPE Data flow.
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A. Nagios Server execute check_nrpe command at the nagios server and request the remote host to execute the run the command.
B. The check_nrpe command at nagios-server contact NRPE daemon on the remote host and remote to execute the check-command.
C. The output of the remote command returned back ti broe daemon to the check_nrpe on the nagios server.
