EMC EMC Certifications E20-598 Questions & Answers

• Question 21:

  What is a characteristic of EMC Avamar VMware Image backups?

  A. Only one proxy server is supported per vCenter server

  B. File-level restores are supported for Linux clients only

  C. Change Block Tracking can be used to shorten backup times

  D. The Avamar client is installed on each VMware virtual machine

  Correct Answer: C

• Question 22:

  An EMC customer has a backup environment with the following characteristics: Multi node Avamar Data Store version 7.0 Image-level backups for VMs with VADP Integration with EMC Data Domain File system backups stored in Avamar Database and VM images backed up to Data Domain with Avamar

  What benefit does the customer have with this setup?

  A. Database restores can be run from VM Image Backups

  B. VMs can be booted without restoring from backups

  C. File level restores from Data Domain are possible for all client OS

  D. Avamar checkpoints can be stored to a Data Domain

  Correct Answer: B

• Question 23:

  In the EMC Avamar Administration Server View, what color is the status indicator when the node cannot communicate with the administrator server?

  A. Gray

  B. Red

  C. Blue

  D. Amber

  Correct Answer: A

  

• Question 24:

  What are members of an EMC Avamar group policy?

  A. Notification, Retention, Schedule

  B. Notification, Profile, Dataset

  C. Clients, Profile, Retention

  D. Dataset, Schedule, Retention

  Correct Answer: D

• Question 25:

  What happens when a new storage node is deployed in the event of a storage node failure?

  A. A spare storage node must be deployed manually

  B. A spare storage node will be deployed automatically

  C. The utility node is automatically promoted to a storage node

  D. The utility node needs to be deployed manually

  Correct Answer: A

• Question 26:

  Refer to the exhibit.

  

  Which type of VMware backup configuration is shown?

  A. Consolidated backup

  B. Guest level backup

  C. Image level backup with VADP

  D. Console backup

  Correct Answer: C

• Question 27:

  What happens when a domain containing clients is deleted?

  A. Clients are automatically retired; their backups are maintained

  B. Clients are deleted; their backups are maintained

  C. Clients and their backups are moved to the MC_SYSTEM domain

  D. Clients are deleted; their backups are deleted

  Correct Answer: D

• Question 28:

  Which process divides the data into chunks for EMC Avamar deduplication data flow processing?

  A. Compression

  B. Hash cache checking

  C. SHA-1 Hashing

  D. Sticky-byte factoring

  Correct Answer: D

  Assume the file HAS been changed, and therefore the hash of the file no longer matches the hash in the file cache. From here, the data will be broken into variable segment lengths through Avamar's patented sticky byte factoring process.

  These segments are then compressed and hashed, and the resulting hash is written to a HASH CACHE file locally on the client. This file is also loaded into RAM when a backup is initiated.

  http://www.egroup-us.com/2011/09/emc-avamar-how-source-global-dedupe-magic-happens/

  Avamar, has a rather nifty technology called Sticky Byte Factoring which allows it to identify the changed information inside a file by breaking the file into variable length objects, this leads to much greater efficiency than fixed size approaches

  as changes made early in a fixed length sequence affect all subsequent blocks/ chunks/objects/whatever in that sequence. This in turn changes all the fingerprints taken following the changed data which means you end up with a lot of new

  blocks/chunks/objects/whatever even if the data really hasn't changed all that much. Sticky Byte Factoring on the other hand can tell what exactly has changed, not just that things have changed.

  http://storagezilla.typepad.com/storagezilla/2007/09/the-future-is-v.html

• Question 29:

  For which situation is the adaptorctl.pl command used?

  A. Associating an Avamar server with a Backup Recovery Manager server

  B. Moving a client to a different domain in Avamar Client Manager

  C. Adding a server to be managed with Enterprise Manager

  D. Configuring a network adapter card for backup data traffic

  Correct Answer: A

• Question 30:

  A customer manually runs a backup job with a retention time of 60 days. After the backup completes, they notice that the retention tag was set to "N".

  Why?

  A. End User on Demand Retention was set to "no end date"

  B. The default retention of the default group was set to "N"

  C. On-demand backups are always assigned a retention tag of "N"

  D. On-demand backups do not use retention times

  Correct Answer: C

  There are several way to set flags for on-deman backups. Server Side backup:

  1.

  "Backup and Restore" View, Can specify through "advanced"

  2.

  "Policy" View, "Backup Up Group Now", Defined flags for group

  3.

  "Policy" View, "Backup Up Client Now", Defind flags for selected group Client Side Backup:

  1.

  Avtar command line mode, user can specify flags

  2.

  GUI, can not specify. N flag. https://community.emc.com/thread/99800