NS0-155 Online Practice Questions and Answers

Correct Answer: A

https://library.netapp.com/ecmdocs/ECMP1196991/html/GUID-EEBC8B52-BEA9-4B49-874F- 7EC78D3F602E.html

Each open systems platform, when prompted by the secondary system, transfers initial base images of specified directories to qtree locations on the secondary system. Note: There are no primary-side Snapshot copies in Open Systems SnapVault.

Correct Answer: AD

http://vipulvajpayeestorage.blogspot.com/2012/01/manually-failover-activity-in-netapp.html

In order to test or effect a Disaster Recovery operation, you must restrict access to the disaster site node to prevent the node from resuming service. If you do not, you risk the possibility of data corruption.

Access to the disaster site note can be restricted in the following ways:

Turn off the power to the disaster site node Use "manual fencing" (Disconnect VI interconnects and fiber channel cables; either physically or through configuration changes on the fabric switches.) Isolating the failed node from the surviving

node could still lead to the possibility of a split brain, so this is not a correct answer.

Correct Answer: CDE

https://library.netapp.com/ecmdocs/ECMP1196986/html/GUID-E5AD37DE-2F44-47DB-90A3- C8E115FCBFB7.html SnapVault replicates at the file level not the block level. Deduplication is always a post-processed activity for Data OnTap, while compression is an inline process. The deduplication schedule depends on the SnapVault update schedule on the destination system. A new Snapshot copy replaces the archival Snapshot copy after deduplication finishes running on the destination system. (The name of this new Snapshot copy is the same as that of the archival copy, but the Snapshot copy uses a new timestamp, which is the creation time.) The SnapVault update recognizes the deduplicated blocks as changed blocks. Thus, when deduplication is run on an existing SnapVault source for the first time, all saved space is transferred to the destination system.

Correct Answer: BD

This question is out of date, but its still on the exam as of Sept2013! NOW has been replaced with support.netapp.com.

You should be very familiar with what AutoSupport does. Also if you have done any research, you know that the System Configuration Guide is an invaluable tool that you will use regularly. Neither of those are related to bugs.

Bugs Online (BOL) is located at http://support.netapp.com/NOW/cgi-bin/bol/ Bugs Online provides a suite of tools to help manage and resolve your bug issues.

The Release Bug Advisor is located at

http://support.netapp.com/NOW/cgi-bin/relrec There is also a Version Comparison tool available at https://communities.netapp.com/docs/DOC-8168/diff?secondVersionNumber=8

Correct Answer: BD

This option causes the file system to remain the same size and not grow or shrink when a SnapMirrored volume relationship is broken, or when a vol add is performed on it. This option is automatically set to be on when a volume becomes a SnapMirrored volume. It will remain on after the snapmirror break command is issued for the volume. This allows a volume to be SnapMirrored back to the source without needing to add disks to the source volume. If the volume size is larger than the file system size, turning off this option will force the file system to grow to the size of the volume. The default setting is off. http://wafl.co.uk/vol-2/#sthash.DbEHR4YS.dpuf

Correct Answer: D

The snapmirror.access option is the preferred method for controlling snapmirror access on a snapmirror source filer. http://www.wafl.co.uk/snapmirrorallow/#sthash.4Cb8IqqN.dpuf

Correct Answer: A

https://communities.netapp.com/servlet/JiveServlet/previewBody/4791-102-2-13466/tr-3466.pdf

Pg 17

OSSV hosts listen for communications from NDMP manager applications on port 10000 by default.

Correct Answer: D

https://library.netapp.com/ecmdocs/ECMP1196995/html/GUID-577EDC41-FEA0-4987-8F04- 55E736962FD1.html

Always unmount the LUN before you run the snap restore command on a volume containing the LUN or before you run a single file SnapRestore of the LUN. For a single file SnapRestore, you must also take the LUN offline.

Correct Answer: AD

https://communities.netapp.com/servlet/JiveServlet/previewBody/4803-102-1-6405/tr-3548.pdf

It is important to remember that this is the case only when a complete site is lost. In the case of a failed controller at one of the sites, a normal cluster failover occurs. Due to the operation of SyncMirror, there is also added protection from multidrive or complete shelf failures. When a storage controller fails in an active-active configuration, the partner detects the failure and automatically (if enabled) performs a takeover of the dataserving responsibilities from the failed controller. Part of this process relies on the surviving controller being able to read information from the disks on the failed controller. If this quorum of disks is not available, then automatic takeover won't be performed. In a MetroCluster configuration, manually executing a single command will allow a takeover to occur in spite of the lack of a quorum of disks. This "forced takeover" process breaks the mirrored relationships in order to bring the failed controller's volumes on line.

forcetakeover -d is very dangerous. Not only can it cause data corruption, if not used carefully, it can also lead to a situation where both the node and its partner are operational (split brain). As such, it should only be used as a means of last resort when the takeover and forcetakeover commands are unsuccessful in achieving a takeover. The operator must ensure that the partner node does not become operational at any time while a node is in a takeover mode initiated by the use of this command. In conjunction with RAID mirroring, it can allow recovery from a disaster when the two nodes in the HA pair are located at two distant sites.

Correct Answer: B

Aggregates are never converted as part of an upgrade. An upgrade will not touch your data!