HCIP-Big Data Developer V2.0 (H13-723_V2.0) Practice Test

Questions # 151:

RedisIn cluster mode, useJAVAWhich of the following is a best practice for application development?

Options:

useJedisobject connectionRedis Server,transferJedisofset.qetWaiting for business operation interface to process data operate.

useJedisPoolobject createdJedisObject pool, each business operation starts fromJedisPoolget one Jedisobject, then call,Jedisofset.getWait for the business operation interface to perform data operations.

useredisClusterobject connectionRedis Server,transferJedisClusterofset.getother business operations interface for data manipulation; in multithreaded applications, multiple threads share oneJedisClusterobject.

useJedisClusterobject connectionRedis Server,transferJedisClusterofset,getother business operations interfacet.

In multithreaded applications, each thread creates aJedisClusterobject.

Questions # 152:

Which of the following measures can improveHBasequery performance? (multiple choice)

Options:

pre-scoreregion,MakeregionEvenly distributed, improve concurrency

Query frequent attributes are placed inrowkeyThe front part

Use secondary indexes to adapt to more query scenarios

Data read at the same time are stored in the samecellmiddle

Questions # 153:

Which of the following is notMapReducespecialty?

Options:

Easy to program.

Good scalability

Calculate in real time

High fault tolerance

Questions # 154:

forSpakstreamingapplication, in aJVM, there can only be one at a time

Streamingcontextis active.

Options:

True

False

Questions # 155:

existBaseIn application development, when a table'sRowkeyRange and distribution are known, pre-score is recommendedregion,

Please call the following code (fragment) to pre-sort a tableregionAfter this table will create severalregion?

splits【0】=Bytes.toBytes("A");splits【1】=Bytes.toBytes("H");splits【2】

=Bytes.toBytes("O");splits【3】=Bytes.toBytes("U");admin.createTable(htd,splits);

Options:

Questions # 156:

HDFSRuntime,(NameNodeAt startup,)NameNodewill file system metadata from

The disk is all loaded into memory, so the total number of files that the file system can store is limited byNameNodeof memory

capacity.

Options:

True

False

Questions # 157:

RedisofLISTData structure, suitable for which of the following scenarios? (multiple choice)

Options:

Build queuing systems, such as message queues

Port uniq operations, such as getting the ranking value of all data in a certain period of time

Get the latest N data operations: for example, get the latest 10 comments on a Weibo

simulating stack operations

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