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All ZooKeeper nodes can process read requests.

A.

True

B.

False

Comparing Spark and MapReducei, which of the following statements are correct?

A.

Shuffle is not a necessary process in Spark tasks

B.

Spark can cache intermediate results in memory reducing disk I0

C.

Shuffle is a necessary process in Spark tasks

D.

Intermediate results of Spark tasks can only be stored in memory

In the Mapreducei process, by default, a shard is a block and a mapTask.

A.

True

B.

False

How does ElasticSearch index data?

In F1ink, the checkpoint mechanism can ensure that when the application fails during operation, it can recover from a certain checkpoint. During this process, stream snapshots are created in sequence according to the order of data inflow.

A.

True

B.

False

F1ink state preservation mainly depends on( )mechanism, which regularly backs up the state in the program.

Which of the following operations cannot be recorded in the Fusioninsight HD system audit log?

HMaster needs to be connected when using HBase for data reading service in Fusioninsight HD

A.

True

B.

False

The following is for the LdapSearer organization?Type statement is correct

A.

Each node in the LdapSearer directory is called?day, and?has its own uniquely distinguishable name?IN (Distingarl shed Mama)

B.

Specific objects cannot be defined under organizational units.

C.

LdapSearer directory information is based on? ?structure to carry out?woven and stored.

D.

The tree of the LdapSearer directory tree generally defines the domain name dc (Dcmain Compen?)

In the MRS interface, Loader can specify a variety of different data sources, configuration data cleaning and conversion steps, and configure cluster storage systems, etC. .

A.

TRUE

B.

FALSE

User Rights Management Role-Based Access Control (RBAC), which provides visual multi-group unified user rights management in clusters.

A.

True

B.

False

Kerberos can only provide security authentication for services within the cluster.

A.

True

B.

False

The following offon HDFSarity ofholding a spoontransformedProcess description,pleaseArrange from top to bottom in the correct order.

A.

Saccn? ?node periodically fromMa? ?download?and?files

B.

in HDFS Sectionformat onceRear,?will generate fs?me and?twodelivery

C.

to replace?file, and will?coincident name?make up new?and and.

D.

to avoid?Increasing,?will be merged periodically?become new?.

E.

put frimage?combine into new? ?document.

The HDFS data reading process includes the following steps, please choose the correct order. (Drag picture title, sort question)

A.

After obtaining this input stream, the client calls the read method to read the data. The input stream selects the nearest DataNode to establish a connection and read data.

B.

The client calls close. to close the input stream.

C.

The location where the data block corresponding to this file in NameNodel is obtained by calling NameNode remotely through RPC

D.

If the end of the data block has been reached. Then close the connection with this DataNodel, and then re-find E. a data block. until all data is read.

E.

The client calls the open method of the FileSystem instance to obtain the input stream corresponding to the file.

F? ?middle is ten? ?Lightweight?of?Technology provides Cha? ?mechanism, distributed snapshots can? ?Tap Taak/Opara? ?The state data of the global unified snapshot processing.

A.

TRUE

B.

FALSE