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Cloudera CODE: CCB-400 Exam Name: Cloudera Certified Specialist in Apache HBase Exam

http://www.testsexpert.com/CCB-400.html

Type

Microsoft

1

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Question: 1 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 query ZooKeeper to find 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. The client application will fail with a runtime error.

Answer: A Question: 2 You have an average key-value pair size of 100 bytes. Your primary access is random needs on the table. Which of the following actions will speed up random reading performance on your cluster? A. Turn off WAL on puts B. Increase the number of versions kept C. Decrease the block size D. Increase the block size

Answer: D Question: 3 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 Explanation: Reference: http://archive.clouder

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a.com/cdh4/cdh/4/hbase/book.html#delete (scroll below and see 5.8.1.5. Delete topic, read the last paragraph)

Question: 4 You have an "Employees" table in HBase. The Row Keys are the employees' IDs. You would like to retrieve all employees who have an employee ID between 'user_100' and 'user_110'. The shell command you would use to complete this is: A. scan 'Employees', {STARTROW => 'user_100', STOPROW => 'user_111'} B. get 'Employees', {STARTROW => 'user_100', STOPROW => 'user_110'} C. scan 'Employees', {STARTROW => 'user_100', SLIMIT => 10} D. scan 'Employees', {STARTROW => 'user_100', STOPROW => 'user_110'}

Answer: D Question: 5 Under default settings, which feature of HBase ensures that data won't be lost in the event of a RegionServer failure? A. All HBase activity is written to the WAL, which is stored in HDFS B. All operations are logged on the HMaster. C. HBase is ACID compliant, which guarantees that it is Durable. D. Data is stored on the local filesystem of the RegionServer.

Answer: A Explanation: Reference: http://tm.durusau.net/?p=27674 (See ‘From the post’ second paragraph)

Question: 6 You have two standbys and one primary HMaster. Your primary HMaster fails. Which of the remaining HMasters becomes the new primary? A. Whichever HMaster first responds to ZooKeeper B. Whichever HMaster ZooKeeper randomly selects C. Whichever HMaster creates the znode first D. Whichever HMaster has the lower IP address

Answer: A Microsoft

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Question: 7 Data is written to the HLog in which of the following orders? A. In order of writes B. In order of writes, separated by region C. Ascending first by region and second by row key D. Descending first by region and second by row key

Answer: D Question: 8 You have a table with the following rowkeys: r1, r2, r3, r10, r15, r20, r25, r30, r35 In which order will these rows be retrieved from a scan? A. r35, r30, r3, r25, r20, r2, r15, r10, r1 B. r1, r2, r3, r10, r15, r20, r25, r30, r35 C. r1, r10, r15, r2, r20, r25, r3, r30, r35 D. r35, r30, r25, r20, r15, r10, r3, r2, r1

Answer: D

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Cloudera CODE: CCB-400 Exam Name: Cloudera Certified Specialist in Apache HBase Exam

http://www.testsexpert.com/CCB-400.html Microsoft

Cisco

IBM

MCTS 70-177

CCNA 640-802 640-822 640-816 640-460

MBS 98-361 98-366

CCNP 642-832 642-813 642-825 642-845

000-G01 000-M44

MCAS 77-602

CCSP 642-627 642-637 642-647 642-545

000-444 000-910

MCSE 70-282

CCIE 350-001 350-018 350-029 350-060

COG-105 COG-185

MCSA 2003 70-461 70-620

DATA CENTER 642-972 642-973 642-974 642-975

70-162 70-462

MB3-861

77-601 77-604 70-281 70-284 70-680

70-463

MB3-862

77-605 70-285

70-291

Microsoft

5

IBM

IBM Lotus

000-M42 000-M60

000-M41 000-M62

IBM Mastery

000-M43 000-M45

Solutions Expert

000-640 000-913

IBM Cognos

COG-180 COG-200

IBM Specialist

000-005 000-032

000-015 000-042

HP

Other

AIS

70-323 9L0-063 9L0-010 9L0-517 HP2-E53 70-321 650-179 1Y0-A20 00M-646 MB2-876 646-206 9L0-314 MB6-884 220-701 650-196 3305 MB6-871 HP2-Z22 9L0-407 9A0-146 HP2-H23 000-184 1Z0-527 HP2-B91 000-781 M70-201 M70-101 7004 HP3-X11 HP3-X08

HP0-311

HP0-M28

HP0-A25

HP0-M30

APC

HP0-D11 HP0-S29

HP0-J37 HP0-P14

MASE HP0-J33 HP0-M48 HP0-M49 HP0-M50 ASE

HP0-066 HP0-781

HP0-082 HP0-782

CSE

HP0-090 HP0-277

HP0-276 HP0-760

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CCB-400 questions and answers