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Question 1:
What is the purpose of Vertica\’s transaction model? (Select three.)
A. Transactions mean that undo logs are not needed.
B. Transactions are used to maintain partitions.
C. Transactions are only written upon an explicit commit being issued.
D. Transactions are used for data recovery.
E. Transactions are used to delete data.
F. Transactions are used to maintain segmentation.
Correct Answer: AC
Question 2:
What distinguishes table partitioning from projection segmentation?
A. If table data is partitioned, associated projections can only be replicated.
B. If table data is partitioned, the table cannot participate in a prejoin projection.
C. If table data is partitioned, associated projections cannot be segmented.
D. If table data is partitioned, associated projections can also be segmented.
Correct Answer: D
Question 3:
What are key features of Vertica? (Select three.)
A. uses fully custom SQL syntax
B. columnar data store
C. stored data that is encoded and compressed
D. native high availability
E. runs on a Windows platform
F. data caching for fast retrieval
Correct Answer: BCD
Reference:http://www.vertica.com/the-analytics-platform/
Question 4:
What does the acronym RLE stand for?
A. run language encoding
B. random length encoding
C. random language encoding
D. run length encoding
Correct Answer: D
Reference:http://www.vertica.com/2010/05/26/why-verticas-compression-is-better/(paragraph right under illustration 1)
Question 5:
What are the disadvantages of using delete vectors to identify records marked for deletion? (Select two.)
A. Delete vectors are stored in a different location, minimizing storage impact.
B. Delete vectors rewrites files, causing additional overhead.
C. Delete vectors must be recognized during the query process to remove records marked for deletion from the result set, slowing down the processing of a query.
D. Delete vectors do not instantly reclaim space used by deleted records.
E. Delete vectors must be maintained forever.
Correct Answer: CD
Question 6:
What is the difference between dropping a partition and deleting records?
A. Dropping a partition creates delete vectors; deleting records does not create delete vectors.
B. Dropping a partition can be rolled back; deleting records cannot be rolled back.
C. Dropping a partition creates new files; deleting records does not create new files.
D. Dropping a partition recovers space immediately; deleting records does not recover space immediately.
Correct Answer: A
Question 7:
What are the actions of the mergeout task? (Select three.)
A. Mergeout rewrites all ROS containers.
B. Mergeout writes data to memory.
C. Mergeout consolidates containers on disk.
D. Mergeout places data into all defined projections on the source table.
E. Mergeout purges deleted data already on disk.
F. Mergeout moves data from memory to disk.
Correct Answer: CDE
Reference:https://my.vertica.com/docs/6.1.x/HTML/index.htm#2624.htm#o14826
Question 8:
Which statement is true about the data directory location across the nodes of a cluster?
A. It must be in the same location on each node.
B. It can be stored in different formats on different nodes.
C. It can be in different locations on each node.
D. It must be in a single location, accessible to all nodes in the cluster.
Correct Answer: D
Question 9:
Which task consolidates data containers, sorting, compressing, and purging data as needed?
A. mergesync
B. movesync
C. mergeout
D. moveout
Correct Answer: C
Reference:https://my.vertica.com/docs/6.1.x/HTML/index.htm#2624.htm#o14826
Question 10:
What is a benefit of having identically-sorted buddy projections?
A. improved storage usage, since Vertica shares data files
B. more efficient use of disk since the data is only on one node
C. better query performance, since Vertica gets half the data from each projection
D. fast recovery of a down node
Correct Answer: D
Question 11:
What is local segmentation capability in Vertica?
A. Vertica automatically splits current segments in half to redistribute them to new nodes.
B. Vertica automatically partitions the data, allowing partitions to be dropped and recreated on new nodes.
C. Vertica automatically creates more segments than are currently needed, allowing some segments to be moved to new nodes as needed.
D. Vertica automatically partitions the segmented data, allowing some partitions to be moved to new nodes as needed.
Correct Answer: D
Reference:http://vertica-forums.com/viewtopic.php?f=5andt=874
Question 12:
What is the process for online recovery of a failed node? (Select two.)
A. The recovered node gathers the necessary files from nodes with its buddy projections.
B. The recovered node verifies that it is current once a recovery cycle completes.
C. The recovered node uses spread to speed up the recovery process.
D. The recovered node restores all files from the last backup.
E. The recovered node must be rebuilt from epoch 0.
Correct Answer: BD
Question 13:
How can you disallow user connections, while preserving dbadmin connectivity?
A. SELECT close_session (session_id);
B. SELECT close_all_sessions;
C. SELECT set_config_parameter (\’MaxClientSessionsVS\’);
D. SELECT set_config_parameter (\’MaxClientSessionsVO\’);
Correct Answer: C
Question 14:
Who can log in to the Management Console?
A. root and dbadmin users only
B. root user only
C. any user with permission granted
D. dbadmin user only
Correct Answer: A