NetApp NetApp Certifications NS0-155 Questions & Answers

• Question 111:

  To collect per client NFS statistics on a storage system, the option nfs.per_client_stats.enable must be set on.

  A. True

  B. False

  Correct Answer: A

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

  nfs.per_client_stats.enable

  Enables/disables the collection and display of perclient NFS statistics, as described in na_nfsstat(1). Valid values for this option are on or off. The default value for this option is off.

• Question 112:

  Which statement best describes the output of this command? sysstat -s 5

  A. Display the default output every five seconds and terminate after five counts.

  B. Display extended output every five seconds and print a summary after five counts.

  C. Display extended output every five seconds and print a summary upon termination.

  D. Display the default output every five seconds and print a summary upon termination.

  Correct Answer: D

  http://backdrift.org/man/netapp/man1/na_sysstat.1.html -s Display a summary of the output columns upon termination, descriptive columns such as `CP ty' will not have summaries printed. Note that, with the exception of `Cache hit', the `Avg' summary for percentage values is an average of percentages, not a true mean of the underlying data. The `Avg' is only intended as a gross indicator of performance. For more detailed information use tools such as na_nfsstat, na_netstat, or statit.

• Question 113:

  Which exportfs command will temporarily export the resource while ignoring the options specified in the / etc/exports file?

  A. exportfs -a

  B. exportfs -i

  C. exportfs -u

  D. exportfs -v

  Correct Answer: B

• Question 114:

  Which two are Data ONTAP commands for displaying performance information? (Choose two.)

  A. nfsstat

  B. perfstat

  C. sio_ntap_soll

  D. sysstat

  Correct Answer: AD

  https://library.netapp.com/ecmdocs/ECMP1196979/html/man1/na_sysstat.1.html https:// library.netapp.com/ecmdocs/ECMP1196890/html/man1/na_nfsstat.1.html

  nfsstat and sysstat are OnTap commands used for performance information.

  sio_ntap_soll is not an OnTap command.

  Perfstat is a GUI performance tool, not an OnTap command. Think of PerfMon for Windows to remind you that PerfStat is a Windows tool. Note how many of the ONTAP performance commands end in stat.

• Question 115:

  To automatically export volumes and directories on storage system reboot, include them in the /etc/exports file.

  A. True

  B. False

  Correct Answer: A

  https://library.netapp.com/ecmdocs/ECMP1196890/html/man5/na_exports.5.html

  The /etc/exports file contains a list of export entries for all file system paths that Data ONTAP exports automatically when NFS starts up.

• Question 116:

  Which two statements apply to an entry in the /etc/exports file regarding exporting directories/qtrees and volumes? (Choose two.)

  A. Each volume must be exported separately.

  B. Exports are accessible only to hosts with names.

  C. User names used in an export must be resolvable.

  D. Exports can access multiple paths on the same volume.

  Correct Answer: AD

  https://library.netapp.com/ecmdocs/ECMP1196890/html/man5/na_exports.5.html

  IP addresses and wildcards can be used when specifying host targets in exports. User names are not valid exports options, save for the anon option which utilizes a local system UID or user name (i.e. no user name mapping or resolution is performed.) The highest level in the filesystem that can be specified for an export is the volume level. Implicitly this means that each volume must be exported separately. An export provides access to paths below the export, implying that multiple paths on the same volume can be exported from an export.

• Question 117:

  Executing this command will have what effect? Options wafl.default_security_style ntfs

  A. It will set the security style of all files to be ntfs.

  B. It will change the security style of all qtrees to be ntfs.

  C. It will change the security style of all existing volumes to be ntfs.

  D. It will set the security style of all newly created volumes to ntfs.

  Correct Answer: D

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

  wafl.default_security_style Specifies the default security style assigned to a new volume. All qtrees created on the volume get this as their security style. Legal values for this option are `unix', `ntfs', or `mixed'. The default value for this option is `unix', unless the node is an NTFS-only node, in which case the default is `ntfs'. Note: if cifs setup is run after setting wafl.default_security_style, the filer will become an NTFS security style filer.

• Question 118:

  UNIX allows file access based on __________.

  A. GID or UID and ACLs.

  B. GID or UID and UNIX permissions.

  C. NT ACLs and SID.

  D. NT ACLs and UNIX permissions.

  Correct Answer: B

  *

  Unix-like operating systems identify users within the kernel by an unsigned integer value called a user identifier, often abbreviated to UID or User ID. The range of UID values varies amongst different systems; at the very least, a UID

  represents a 15-bit integer, ranging between 0 and

  The UID value references users in the /etc/passwd file. Shadow password files and Network Information Service also refer to numeric UIDs. The user identifier has become a necessary component of Unix file systems and processes.

  *

  In POSIX-compliant environments the command-line command id gives the user's user identifier number as well as more information on the user account like the user name, primary user group and group identifier (GID).

  *

  Files and directories are owned by a user. The owner determines the file's owner class. Distinct permissions apply to the owner.

  Files and directories are assigned a group, which define the file's group class. Distinct permissions apply to members of the file's group members. The owner may be a member of the file's group. Users who are not the owner, nor a member

  of the group, comprise a file's others class. Distinct permissions apply to others. The effective permissions are determined based on the user's class. For example, the user who is the owner of the file will have the permissions given to the

  owner class regardless of the permissions assigned to the group class or others class.

• Question 119:

  NTFS allows file access based on ___________.

  A. NT ACLs and SID.

  B. NT ACLs and UNIX permissions.

  C. SID and password.

  D. UNIX permissions.

  Correct Answer: A

  http://hd.kvsconsulting.us/netappdoc/801docs/html/ontap/smg/GUID-866DD79D-D2A6-4FBA- B0BDA63560FECEFF.html

  In OnTap 8.0, when NTFS security style is used, only Windows style security objects are used. For CIFS clients, security is handled using Windows NTFS ACLs. For NFS clients, the NFS UID (user id) is mapped to a Windows SID (security identifier) and its associated groups. Those mapped credentials are used to determine file access, based on the NFTS ACL.

• Question 120:

  If the security style is set to UNIX, CIFS client file access is determined by ___________.

  A. NT ACLs

  B. the last client to set permissions

  C. the mapped UNIX UID/GID of the CIFS client and the UNIX file permissions

  D. This is not allowed: A CIFS client cannot access files in a path set to a security style of UNIX

  Correct Answer: C

  https://library.netapp.com/ecmdocs/ECMP1196993/html/GUID-09C7812F-E6EA-47C6-AB79- EAB803E7A8EB.html

  For Data ONTAP to obtain the UID and GIDs for a CIFS user, it must first determine the user's UNIX- style name. It does this through user mapping.