Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
1. How does the HDFS architecture provide redundancy?
A) Reliance on RAID at each datanode.
B) DataNodes make copies of their data blocks, and put them on different local disks.
C) Storing multiple replicas of data blocks on different DataNodes.
D) Reliance on SAN devices as a DataNode interface.
2. Identify the function performed by the Secondary NameNode daemon on a cluster configured to run with a single NameNode.
A) In this configuration, the Secondary NameNode servers as alternate data channel for clients to reach HDFS, should the NameNode become too busy.
B) In this configuration, the Secondary NameNode performs a checkpoint operation on the files by the NameNode.
C) In this configuration, the Secondary NameNode is standby NameNode, ready to failover and provide high availability.
D) In this configuration, the Secondary NameNode performs deal-time backups of the NameNode.
3. Identify four characteristics of a 300MB file that has been written to HDFS with block size of 128MB and all other Hadoop defaults unchanged?
A) Each block will be replicated nine times
B) The third Initial block will be 44 MB
C) The file will be split into three blocks when initially written into the cluster
D) Each block will be replicated three times
E) All three blocks will be 128MB
F) The third block will be 64MB
G) Two of the initial blocks will be 128MB
H) The file will consume 1152MB of space in the cluster
4. You have a cluster running with the Fair in Scheduler enabled. There are currently no jobs running on the cluster, and you submit a job A, so that only job A is running on the cluster. A while later,
you submit job B, Now job A and job B are running on the cluster at the same time.
Which of the following describes how the Fair Scheduler operates? (Choose 2)
A) When job A gets submitted, it doesn't consume all the task slots.
B) When job A gets submitted, it consumes all the task slots.
C) When job B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.
D) When job B gets submitted, job A has to finish first, before job B can get scheduled.
5. What does CDH packaging do on install to facilitate Kerberos security setup?
A) Creates and configures you kdc with default cluster values.
B) Creates a set of pre-configured Kerberos keytab files and their permissions.
C) Creates users for hdfs and mapreduce to facilitate role assignment.
D) Automatically configure permissions for log files at $MAPPED_LOG_DIR/userlogs
E) Creates directories for temp, hdfs, and mapreduce with correct permissions.
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: B | Question # 3 Answer: B,C,D,G | Question # 4 Answer: B,D | Question # 5 Answer: C |
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