You have one primary HMaster and one standby. Your primary HMaster Falls fails and your client application needs to make a metadata change. Which of the following is the effect on your client application?

A. The client will queryZooKeepertofind the location of the new HMaster and complete the metadata change.

B. The client will make the metadata change regardless of the slate of the HMaster.

C. The new HMaster will notify the client and complete the metadata change.

D. Theclientapplication will fail with a runtime error.

You need to free up disk space on your HBase cluster. You delete all versions of your data that is older than one week. You notice your delete has had minimal impact on your storage availability. This is because:

A. You have large store file indexes

B. HBase has not flushed the MemStore

C. HBasehas not run a minor compaction

D. HBase has notrun a major compaction

You have a total of three tables stored in HBase. Exchanging catalog regions, how many regions will your RegionServers have?

A. Exactly three

B. Exactly one

C. At least one

D. Atleastthree

Given the following HBase dataset, which is labeled with row numbers. . .

Row # ROW KEY COLUMN+CELL 1 BB002 Column=Comments:C_Author, timestamp=001, value=Diana Mears 2 BB002 Column=Comments:C_Title, timestamp=001, value=Thanks 3 BB001 Column=INFO:Title, timestamp=005, value=HBsase+Hadoop 4 BB001 Column=INFO:Author,timestamp=005,value=Lars George 5 BB002 Column=Comments:C_Text, timestamp=001, value=Any tips on ... 6 BB001 Column=INFO:Text, timestamp=005, value=Some of the ...

Which of the following lists of row numbers is the correct order that HBase would store this data?

A. 1, 5, 2, 4, 3, 6

B. 4, 1, 2, 6, 3, 5

C. 4, 6, 3, 1, 5, 2

D. 3, 4, 6, 1, 2, 5

From within an HBase application, you would like to create a new table named weblogs. You have started with the following Java code:

HBaseAdmin admin = new HBaseAdmin (conf);

HTableDescriptor t = new HTableDescriptor("weblogs");

Which of the following method(s) would you use next?

A. admin.createTable(t);admin.enable.Table(t);

B. admin.createTable(t);

C. HTable.createTable(t);HTable.enableTable(t);

D. HTable.createTable(t);

You want to do mostly full table scans on your data. In order to improve performance you increase your block size. Why does this improve your scan performance?

A. It does not. Increasing block size does not improve scan performance.

B. It does not. Increasing block size means that fewer blocks fit into your block cache. This requires HBase to read each block from disk rather than cache for each scan, thereby decreasing scan performance.

C. Increasing block size requires HBase to readfrom disk fewer times, thereby increasing scan performance.

D. Increasing block size means fewer block indexes that need to be read from disk, therebyincreasing scan performance.

Your client application connects to HBase for the first time and queries the .META. table. What information does the .META. table provide to your client application?

A. The location of a Region

B. The location ofan MMaster

C. The location of aZooKeeper

D. The location of a璕OOT璽able

Which of the following configuration values determines automated splitting?

A. hbase.hregion.majorcompaction

B. hbase.hregion.flush.size

C. hbase.balancer.period

D. hbase.hregion.max.filesize

You have a key-value pair size of l00 bytes. You increase your HFile block size from its default 64k. What results from this change?

A. scan throughput increases and random-access latency decreases

B. scan throughput decreases and random-access latencyincreases

C. scan throughput decreases and random-access latencydecreases

D. scan throughput increases and random-access latency increases

You have tin linage table live in production. The table users as the rowkey. You want to change the existing rowkeys to . Which of the following should you do?

A. Modify the client application to write to both the old table and a new table while migrating the old data separately

B. Use theALTERtable command to modify the rowkeys

C. Use theASSIGNcommand to modify the rowkeys

D. Add a new columnto store the userid