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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:
1. Which daemons instantiates JVM's to perform mapreduce processing in a cluster running mapreduce v1 (MRv1)?
A) Datanode
B) Jobtracker
C) Tasktracker
D) Resourcemanager
E) Namenode
F) Applicationmaster
G) Nodemanager
H) applicationmanager
2. Each slave node in your cluster has four 2 TB hard drives installed (4x2TB). You set a value of the dfs.du.datanode.received parameter to 100GB on each slave node. How does this alter HDFS block storage?
A) All Hard drives may be used to store HDFS blocks as long as at least 100GB in total is available on the node
B) 100 GB on each hard drive may not be used to store HDFS blocks
C) 25 GB on each hard drive may not be used to store HDFS Blocks
D) a maximum of 100GB on each hard drive may be used to store HDFS blocks
3. When planning a hadoop cluster, what general rule governs the hardware requirements between master nodes and slave nodes?
A) The master nodes require more memory and greater disk capacity then the slave nodes
B) The master nodes requires more memory and no disk drives
C) The master nodes requires more memory but less disk capacity
D) The master and slave nodes should have the same hardware configuration
E) the master nodes requires less memory and fewer number disk drives than the slave nodes
4. Which two features does Kerberos security add to a Hadoop cluster?
A) Authentication for user access to the cluster against a central server
B) User authentication on all remote procedure calls (RPcs)
C) Encryption for data on disk ("at rest")
D) Root access to the cluster for users hdfs and mapred but non-root acess clients
E) Encryption on all remote procedure calls (RPCs)
5. The failure of which daemon makes HDFS unavailable on a cluster running MapReduce v1 (MRv1)?
A) Resource Manager
B) NameNode
C) Secondary NameNode
D) DataNode
E) Node Manager
F) Application Manager
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: B | Question # 3 Answer: C | Question # 4 Answer: A,B | Question # 5 Answer: B |
By Jack
