NS0-155 Real Exam Questions and Verified Answers

Question 1 Single choice

These are three methods of creating a LUN:
* lun create
* lun map

* lun setup

A
True
B
False

Show answer and explanation

Correct answer: B

Explanation

Explanation:
https://library.netapp.com/ecmdocs/ECMP1196979/html/man1/na_lun.1.html
The following commands are available in the lun suite:

Easy to use interactive mechanism for setting up initiator groups, LUNs, and mapping configuration.

lun map [ -f ] lun_path initiator_group [ lun_id ]

Maps a LUN to all the initiators in the supplied group

Question 2 Single choice

Which statement applies to the Open Systems SnapVault Free Space Estimator utility?

A
This utility runs automatically after each transfer.
B
This utility must be enabled on the secondary storage system.
C
This utility determines if there is sufficient disk space available on the primary to perform an OSSV transfer.
D
This utility determines if there is sufficient disk space available on the secondary to perform an OSSV transfer.

Show answer and explanation

Correct answer: C

Question 3 Single choice

Which option will allow a storage system to SnapMirror from this source system?

A
snapmirror.access
B
snapmirror.destination
C
options snapmirror.allow host =
D
options snapmirror.access host =

Show answer and explanation

Correct answer: D

Explanation

Explanation:
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

Question 4 Multiple choice

Which three are valid LUN commands? (Choose three)

A
lun clone
B
lun copy
C
lun move
D
lun rename
E
lun snap

Show answer and explanation

Correct answers: A, C, E

Explanation

Explanation:
https://library.netapp.com/ecmdocs/ECMP1196979/html/man1/na_lun.1.html

The following commands are available in the lun suite:

Question 5 Multiple choice

When viewing the output of the sysstat f command, which three fields are part of the output? (Choose three)

A
FCP
B
FTP
C
CIFS
D
NFS
E
iSCSI

Show answer and explanation

Correct answers: A, C, D

Explanation

Explanation:
http://backdrift.org/man/netapp/man1/na_sysstat.1.html
sysstat [ -c count ] [ -s ] [ -u | -x | -m | -f | -i | -b ] [ -d ] [ interval ] -f For the default format display FCP
statistics.
The FCP default output format is as follows:
CPU NFS CIFS FCP Net kB/s Disk kB/s FCP kB/s Cache in out read write in out age
###% ##### ##### ##### ##### ##### ##### ##### ##### ##### >##

Question 6 Single choice

Which iSCSI security method encrypts data between the initiator and the target?

A
IPSec
B
CHAP
C
LUN masking
D
Header and Data Digests

Show answer and explanation

Correct answer: A

Explanation

Explanation:
IPSec is an encryption transport that can be used to secure any IP traffic including iSCSI.

Question 7 Single choice

For each Open Systems platform directory to be backed up to the SnapVault secondary storage system you must execute _____________.

A
An initial baseline copy
B
A temporary copy
C
An incremental copy
D
A scheduled update copy

Show answer and explanation

Correct answer: A

Explanation

Explanation:
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.

Question 8 Single choice

Is NetApp storage Encryption supported in Data ONTAP 8.1.1 Cluster-Mode?

A
No, but you can file a PVR to request support.
B
No. it is targeted for a future release of Data ONATP.
C
Yes, only with a special license installed.
D
Yes, it has been supported since 8.0.1.

Show answer and explanation

Correct answer: D

Explanation

Explanation:
http://www.ntapgeek.com/2011/03/netapp-storage-encryption-available.html
March, 2011: "With the recent release of Data ONTAP 8.0.1, NetApp now offers full disk encryption to prevent unauthorized access to data at rest."

Question 9 Single choice

In a fabric-attached MetroCluster, a "site failure" is described as a __________.

A
failure of the Inter-Switch-Links (ISL)
B
failure of the interconnect cable
C
complete failure of the primary controller and disk shelves
D
malfunction of the Fibre Channel adapter on the cluster node

Show answer and explanation

Correct answer: C

Explanation

Explanation:
http://argoat.net/Blog/?p=1466

Question 10 Single choice

An aggregate is composed of twelve 36-Gigabyte disks. A drive fails and only 72-Gigabyte spare disks are available. Data ONTAP will then perform what action.

A
Chooses a 72-Gigabyte disk and use it as is.
B
Chooses a 72-Gigabyte disk and right-size it.
C
Halts after 24 hour of running in degraded mode.
D
Alerts you that there are no 36-Gigabyte disks and wait for one to be inserted.

Show answer and explanation

Correct answer: B

Explanation

Explanation:
https://library.netapp.com/ecmdocs/ECMP1196986/html/GUID-8A91F6A2-61B8-42C3-AEAB7D5AA9BBE9CF.html

If a disk fails and no hot spare disk that exactly matches the failed disk is available, Data ONTAP uses the best available spare. Understanding how Data ONTAP chooses an appropriate spare when there is no matching spare enables you to optimize your spare allocation for your environment.

Data ONTAP picks a non-matching hot spare based on the following criteria (and more; in the link above):
If the available hot spares are not the correct size, Data ONTAP uses one that is the next size up, if there is one.
The replacement disk is downsized (aka right sized) to match the size of the disk it is replacing; the extra capacity is not available.