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Huawei HCIA-Big Data(Huawei Certified ICT Associate-Big Data) Sample Questions:

1. What are the correct understandings and descriptions of the main characteristics of big data? (Multiple choice)

A) A large amount of data and a large amount of calculation
B) Fast data growth and fast processing
C) There are many data sources and formats
D) Data value density is low, but value is high

2. Spark divides the stages according to the dependencies of RDDs. The scheduler starts from the end of the DAG graph and traverses the entire dependency chain in reverse. When it encounters narrow dependencies, it disconnects, and when it encounters wide dependencies, it adds them to the current stage.

A) True
B) False

3. Which parameter needs to be configured to enable the log aggregation function of the YARN component on the Hadoop platform?

A) YARN.nodemanager.local-dir
B) YARN.log-aggregation-enable
C) YARN.nodemanager.log-dirs
D) YARN.acl.enable

4. The Group (group) of LdapServer is a unified group management for users. If a user is added to the group, the dn record of the member will be added to the member attribute of the group.

A) True
B) False

5. In order to improve the fault tolerance of Kafka, Kafka supports partition replication strategy. Which of the following descriptions about Leader partition and Follower partition is wrong?

A) It is impossible for each node of a kafka cluster to be the leader and flower of each other
B) Kafka needs to select a leader for the replication of the partition. The leader is responsible for the read and write operations of the partition, and the other replica nodes are only responsible for data synchronization.
C) Since the leader Server bears all the request pressure, considering the overall cluster, Kafka will evenly distribute the leader to each instance to ensure the overall stable performance
D) If the leader fails, another follower will take over (become the new leader)

Solutions: