Cohesity COH284 Certification Exam Sample Questions and Answers

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Cohesity COH284 (Protection Professional - NetBackup) Sample Questions:

01. Jobs from several policies that write to tape have been failing since the weekend. The robot inventories normally and other policies using the same robot complete, but every job that requests one particular drive fails without writing anything. That drive reports a down state.
What does the drive being down indicate?
a) That drive is reserved by another media server and is waiting to be released
b) That drive has been taken out of service and will not be selected until it is up
c) The robotic path to that drive has been removed from the device configuration
d) The media currently loaded in that drive has been frozen by a write error
 
02. A primary server has been lost. The backup images written over the previous month are intact on the media servers' storage.
Which artifact determines whether those images can be restored to the clients?
a) A duplicate copy of the images held on a second storage unit.
b) A host ID certificate issued to the replacement primary server.
c) A catalog backup produced by the catalog backup policy.
d) An exported report listing the backup jobs that completed during the month.
 
03. Over the past week several tape volumes in one library have been frozen by NetBackup, and the same volumes freeze again after they are returned to service. The administrator wants to capture the evidence that explains the freezing instead of continuing to react to it.
Where should the bptm log be enabled, and when should the evidence be collected?
a) On the client whose backups most often land on the affected volumes, before its next scheduled backup.
b) On the media server that owns the drives, before the next backup window writes to those volumes.
c) On the primary server, before the next scheduled catalog backup runs, because the primary records the outcome of every job it schedules.
d) On the media server that owns the drives, immediately after a volume has been frozen and taken out of service.
 
04. A media server has been lost and cannot be repaired. The disk storage it wrote to is intact and reachable, and the primary server, its catalog and the clients are all unaffected. Restores are needed today from images that the lost media server wrote.
What should the administrator do first?
a) Bring the surviving storage back into service through another media server, then run the restores.
b) Recover the catalog from the most recent catalog backup so the records of those images are restored.
c) Import the images from the surviving storage so that the catalog holds records of them.
d) Run fresh backups of the affected clients, since images written through the lost media server can no longer be read.
 
05. Overnight, eleven jobs belonging to six different policies failed with the same status code. Their details show that all eleven were writing to the same media server when they stopped. Jobs from four of those six policies that were routed to a second media server completed normally in the same window.
What does this pattern indicate about where the investigation should begin?
a) With the status code itself, since its documented cause names the component before any job detail is read
b) With the six policies, since an attribute they share is the only thing the failed jobs have in common
c) With the media server they had in common, since the same policies succeeded when their work ran elsewhere
d) With the clients, since one status code repeated across policies points to a condition common to the protected hosts
 
06. An administrator is reading the details of a failed backup job in the Activity Monitor and has not enabled any additional logging.
Which two facts can be established from the job details alone?
(Select two.)
a) Why the media manager froze a tape volume, and which drive was in use at the time
b) Whether the client's host ID certificate is still within its validity period, and when it was issued
c) The client, policy and schedule the job ran under, together with the status it ended with
d) Which volumes in the disk pool are nearest to their capacity, and how quickly they are filling
e) The point in the job's sequence at which it stopped, and the operation it was performing then
 
07. Several clients are latency-sensitive application servers with very little CPU headroom during the backup window. The link between those clients and their media server is a well-provisioned local network that shows light utilisation while backups run.
A colleague proposes enabling client-side deduplication for all of them to shorten the backup window.
How should the proposal be evaluated?
a) Accept it for the largest of these clients only, because the benefit of deduplicating early grows with the size of the data set
b) Reject it for these clients and leave the deduplication on the media server, because the constrained resource is client CPU
c) Reject it, because client-side deduplication is a policy-wide setting and cannot be turned on for individual clients
d) Accept it, because deduplicating at the client takes the media server out of the data path and shortens every job
 
08. An administrator is reviewing the concurrency settings that exist on a storage unit and on a backup policy before changing any of them.
What does the multiplexing setting on a storage unit control?
a) How many job data streams are interleaved onto one storage device
b) How many concurrent jobs a single backup policy is permitted to start
c) How many jobs a storage unit accepts before further jobs are queued
d) How many separate jobs one client's backup selections are divided into
 
09. Users ask for a project directory to be restored as it stood at the end of last week. The restore is run from the most recent backup of that client, and the returned directory holds the files the users expected together with several hundred they deleted a month ago. The client is protected by a weekly full and nightly incrementals, and every restore from that policy's clients behaves the same way.
What explains the restored contents?
a) Accelerator sent only the changed data, so the unchanged files were taken from earlier images.
b) Checkpoint restart resumed an earlier interrupted job, so the files from that run were included in the restore as well.
c) The restore read an older copy of the image, which reflects the directory as it stood when that copy was made.
d) The policy is not collecting True Image Restore information, so the restore returns every file the backups hold.
 
10. An administrator expected several tape volumes to become available again in the scratch pool once the images they held reached the end of their retention, but the volumes have stayed out of the pool.
Which two conditions would keep a volume out of the scratch pool?
(Select two.)
a) The storage unit the volume was written through is flagged so that it is used only when a policy or schedule names it explicitly.
b) NetBackup has frozen the volume.
c) The media server that wrote the volume is currently offline.
d) The images on the volume were duplicated to a second copy held on disk storage.
e) At least one image on the volume has not yet reached the end of its retention.

Solutions:

Question: 01

Answer: b

Question: 02

Answer: c

Question: 03

Answer: b

Question: 04

Answer: a

Question: 05

Answer: c

Question: 06

Answer: c, e

Question: 07

Answer: b

Question: 08

Answer: a

Question: 09

Answer: d

Question: 10

Answer: b, e

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