Exam Code: CCB-400 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Cloudera Certified Specialist in Apache HBase
Certification Provider: Cloudera
Free Today! Guaranteed Training- Pass CCB-400 Exam.

2021 Dec CCB-400 exams

Q21. Your HBase cluster has hit a performance wall and doesn't seem to be getting faster as you add RegionServers. Adding an additional HMaster will:

A. Have no effect on performance.

B. Improve the performance of region writes but decreasethe performance of metadata changes.

C. Improve the performance of metadata chancier, but decrease the performance of region writes.

D. Make theperformance problem even worse, as operations will have to be replicated to multiplemasters.

Answer: A


Q22. The cells in a given row have versions that range from 1000 to 2000. You execute a delete specifying the value 3000 for the version. What is the outcome?

A. The delete fails with an error.

B. Only cells equal to the Specified version are deleted.

C. The entire row is deleted.

D. Nothing in the row is deleted.

Answer: C


Q23. Your client application connects to HBase for the first time to perform a write. Which of the following sequences will it traverse to find the region serving the row range of interest?

A. ZooKeeper -> RegionServer -> Region

B. ZooKeeper ->.META. -> RegionServer -> Region

C. ZooKeeper-> ROOT->.META. -> RegionServer -> Region

D. ZooKeeper -> HMaster->-ROOT-->.META. -> RegionServer -> Region

Answer: C


Improved CCB-400 testing engine:

Q24. You need to create a "WebLogs" table in HBase. The table will consist of a single Column Family called "Errors" and two column qualifiers, "IP" and "URL". The shell command you should use to create the table is:

A. create'WebLogs',{NAME =>'Errors:IP', NAME =>'Errors:URL'}

B. create'WebLogs','Errors'{NAME =>'IP', NAME =>'URL'}

C. create'WebLogs','Errors:IP','Errors:URL'

D. create'WebLogs','Errors'

Answer: C


Q25. Your client application calls the following method for all puts to the single table notifications: 'put.setWriteToWAL, (false);

One region, region1, for the notifications table is assigned to RegionServer rs1. Which of the following statements describes the result of RegionServer rs1 crashing?

A. All datainthe notifications tableis lost

B. No data is lost

C. All data for alltables notflushed to disk on RegionServer rs1is lost

D. Data for your client application in the MemStores for region1is lost

Answer: D


Q26. Given that following is your entire dataset:

How many sets of physical files will be read during a scan of the entire dataset immediately following a major compaction?

A. Two

B. One

C. Three

D. Four

Answer: B


Q27. You have tin linage table live in production. The table users <timestamp> as the rowkey. You want to change the existing rowkeys to <userid><timestamp>. 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

Answer: B