Name: 2025 CertBus CCB-400 exam dumps, CCB-400 PDF+VCE practice, 100% Pass Guaranteed
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SKU: CCB-400
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CCB-400 Q&A's Detail

Exam Code:	CCB-400
Total Questions:	45

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CCB-400 Online Practice Questions and Answers

Questions 1

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

Show Answer

Questions 2

Given that following is your entire dataset:

100 column=Managers:Name, timestamp=13313141762084, value=Steve 100 column=Manage:Salary, timestamp=13313141762086, value=80000 100 column=Skills:Skill_1, timestamp=13313141762089, value=Hadoop 100 column=Skills:Skill_2, timestamp=13313141762092, value=HBase 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

Show Answer

Questions 3

You want to do a full table scan on your data. You decide to disable block caching to see if this improves scan performance. Will disabling block caching improve scan performance?

A. No. Disabling block caching does notimprove scan performance.

B. Yes.When you disable blockcaching, youfreeup that memory for other operations.Witha full table scan,you cannot take advantage of blockcaching anyway because your entiretable won'tfitinto cache.

C. No. If you disable block caching, HBase must read each block index from disk for each scan,thereby decreasing scan performance.

D. Yes. When you disable block caching, youfree up memory forMemStore, which improves,scanperformance.

Show Answer

Questions 4

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

Show Answer

Questions 5

You need to insert a cell with a specific timestamp (version) 13353903160532. Which of the following is true?

A. The timestamp for the entire row must be updatedto13353903160532

B. ThePutclass allows setting a cell specific timestamp

C. ThePutclass allows setting a column family-specific timestamp

D. TheHTableclass allows you to temporarily roll back the newer versions of the cell

Show Answer More Questions

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