20 questions and answers from firefighting organization

STORAGE

1.      Where you define Zones for Storage?
On optical Switches.

2.      What is the main difference between SAN and NAS and what type would you put in this organization?
SAN (Storage Area Network) = block protocol = local storage, must for SQL DB, Exchange Server, etc.
Uses FC, FCoE, iSCSI protocols.
NAS (Network Attached Storage) = ethernet file storage protocol (SMB/NFS) = file server.

SQL

1.      What are MDF and LDF files in SQL?
MDF - Master Database Files
LDF - Log Database Files

2.      What is the difference between DB DETACH and Take Offline?
DETACH removes the registration of the database and deletes DB metadata from SQL server.
DETACH can change the file ACLs so that the detacher has control of them.
Take Offline retains database metadata in SQL server sys.databases system table.

3.      How is it possible to move DB between different SQL servers?
Detach – Move – Attach (MDF/LDF)
Backup – Move – Restore (BAK)

4.      What is the name of SQL Server query language?
T-SQL (Transact-SQL)

WINDOWS SERVER

1.      Is Recycle Bin enabled on DC by default? NO!
2008 R2 - you have to enable the AD Recycle Bin manually by running PowerShell commands.
2012 - you have to enable the AD Recycle Bin manually by running PowerShell commands. You’ve get GUI.

2.      There are 10 defined policies on a specific OU. On the 10^th policy defined DENY on the same definition as on the 1^st policy. Which policy will actually work?
The last.

3.      What is DNS Scavenging?
Feature that allows you to automate the deletion (scavenge) of outdated DNS resource records. 

4.      How to force replication between DC servers?
Active Directory Sites and Services or Repadmin /syncall.

5.      What is ICMP, what is it for, and on which port it works?
ICMP (Internet Control Message Protocol) - error-reporting protocol, there is no TCP/UDP port number. 

6.      What port uses SSH? 22

7.      IIS – you tried to access some internet page and got error 500? What is it?
Internal Server Error 500 is a very general HTTP status code that means something has gone wrong on the web site's server.

VMWARE

1.      What is DRS?
DRS (Distributed Resource Scheduler) – balances the load on the cluster in automated way.

2.      You’ve created VM – what is the first thing to do after booting it and installing OS?
To eject DVD and install VMTools.

3.      In your organization allowed to use only ISO images for transferring data to VMs.
How can you insert ISO to VM?
By using virtual DVD in the VM properties.

4.      You need to check a real-time performance on ESX.
For that you should approach this ESX with SSH. What you need to do?
First you need to enable SSH from ESX or from vCenter and then approach ESX with Putty.

SCENARIOS

1.      User is moving files to the network folder that is synchronized with his profile. One day the sync is interrupted. How would you get to the trouble?
Check that file names are not over 260 characters including the file path.
Check beginning and trailing characters.
Log on to another computer and check sync. Log on to the current computer with different user and check.

Recreate the profile.

2.      There is VM with IIS server. Part of users can access the site and part is not. What would you check?
VLANs and subnets.

CLOUD

1.      Would you recommend moving to CLOUD for organization such as ours? If yes in which layout?
Yes, but only partly as the first step. The first thing I would insert is Office 365.