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Question 1:
Which hash type represents an individual data chunk processed during an EMC Avamar backup?
A. Atomic
B. Root
C. Composite
D. Metadata
Correct Answer: A
Question 2:
For each file that is backed up in an EMC Avamar system, how many total bytes are added to the file cache?
A. 20
B. 24
C. 40
D. 44
Correct Answer: D
The most important thing to do on a client with so many files is to make sure that the file cache is sized appropriately. The file cache is responsible for the vast majority (>90%) of the performance of the vamar client. If there\’s a file cache miss,
the client has to go and thrash your disk for a while chunking up a file that may already be on the server.
So how to tune the file cache size?
The file cache starts at 22MB in size and doubles in size each time it grows. Each file on a client will use 44 bytes of space in the file cache (two SHA-1 hashes consuming 20 bytes each and 4 bytes of metadata). For 25 million files, the client
will generate just over 1GB of cache data.
http://jslabonte.blogspot.com/2013/08/avamar-and-large-dataset-with-multiples.html
Question 3:
What are three types of EMC Avamar hashes?
A. Composite, Root, and Atomic
B. Root, Atomic, and Index
C. Composite, Atomic, and Stripe
D. Root, Atomic, and Parity
Correct Answer: A
Question 4:
What is used by EMC Avamar to provide system-wide fault tolerance?
A. RAID, RAIN, Checkpoints, and Replication
B. RAID, RAIN, Checkpoints, and HFS check
C. Asynchronous crunching, Parity, RAIN, and Checkpoints
D. HFS check, RAIN, RAID, and Replication
Correct Answer: A
Question 5:
The EMC Avamar client needs to backup a file and has performed sticky-byte factoring. This results in the following:
Seven (7) chunks that will compress at 30%
Four (4) that will compress at 23%
Two (2) chunks at 50% compression
How many chunks will be compressed prior to hashing?
A. 4
B. 7
C. 9
D. 13
Correct Answer: C
vamar, 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.
Question 6:
Which four account management actions can be performed from the EMC Client Manager interface?
A. Move clients to a new server Retire clients Move clients to a new domain View management log
B. Move clients to a new domain Retire clients Modify client group associations Schedule backups
C. View management log Modify replication Retire clients Move clients to a new server
D. View management log Retire clients Delete clients Browse clients
Correct Answer: A
Question 7:
Which tool is used to move a client to a new domain in EMC Avamar 6.0?
A. Client Manager
B. Activation Manager
C. Enterprise Manager
D. Installation Manager
Correct Answer: A
Question 8:
How many simultaneous client connections per node will an EMC Avamar server support?
A. 10
B. 15
C. 18
D. 25
Correct Answer: C
During the backup window, an Avamar server has 18 backup “slots” per node, minus one slot that is globally reserved for restore.
Question 9:
What is a characteristic of variable block deduplication?
A. Better granularity and more efficiency
B. Commonly provided in snapshot technologies
C. Small changes require all segments to change
D. Most common deduplication method
Correct Answer: A
Question 10:
A storage node in a multi-node Avamar server has failed and a replacement node has been added to the grid. What is used to reconstruct the data on the new node?
A. RAIN
B. RAID
C. Checkpoint
D. Replication
Correct Answer: A
Question 11:
Which port on the Avamar server does the client connect to when performing a backup with encryption enabled?
A. 27000
B. 28001
C. 28002
D. 29000
Correct Answer: D
Question 12:
Which time zone is used on EMC Avamar nodes?
A. Local time on the utility node; GMT/UTC on the storage nodes
B. GMT/UTC on the utility node; local time on the storage nodes
C. All node types use the local time
D. All nodes use GMT/UTC time
Correct Answer: A
Question 13:
In an EMC Avamar backup operation, which process always produces identical chunk results given the same data?
A. Sticky-byte factoring
B. Compression
C. File caching
D. Hashing
Correct Answer: A
Question 14:
On an EMC Avamar server, what is the file extension of stripes that contain backup chunks?
A. *.dat
B. *.usd
C. *.chd
D. *.cdt
Correct Answer: A
Question 15:
A customer is unable to connect to their EMC Avamar server when using the Avamar Administrator GUI. If default settings are being used, which port must be open for a successful connection?
A. 5555
B. 7778
C. 8443
D. 8080
Correct Answer: B
