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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:

1. 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 file will be split into three blocks when initially written into the cluster
C) Two of the initial blocks will be 128MB
D) The third Initial block will be 44 MB
E) All three blocks will be 128MB
F) The third block will be 64MB
G) The file will consume 1152MB of space in the cluster
H) Each block will be replicated three times

2. You are planning a Hadoop duster, and you expect to be receiving just under 1TB of data per week which will be stored on the cluster, using Hadoop's default replication. You decide that your slave nodes will be configured with 4 x 1TB disks.
Calculate how many slave nodes you need to deploy at a minimum to store one year's worth of data.

A) 50 slave nodes
B) 100 slave nodes
C) 100 slave nodes
D) 10 slave nodes

3. Which command does Hadoop offer to discover missing or corrupt HDFS data?

A) Dskchk
B) The map-only checksum utility,
C) Hadoop does not provide any tools to discover missing or corrupt data; there is no need because three replicas are kept for each data block.
D) Du
E) Fsck

4. Which of the following describe the functions of a scheduling algorithm? (Choose 4)

A) Run jobs at periodic times of the day.
B) Allow short Jobs to complete even when large, long jobs (consuming a lot of resources) are running.
C) Reduce job latencies in an environment with multiple jobs of different sizes.
D) Support the implementation of service-level agreements for multiple cluster users.
E) Allow multiple users to share clusters in a predictable, policy-guided manner.
F) Reduce the total amount of computation necessary to complete a job.

5. You install Cloudera Manager on a cluster where each host has 1 GB of RAM. All of the services show their status as concerning. However, all jobs submitted complete without an error.
Why is Cloudera Manager showing the concerning status KM the services?

A) A slave node's disk ran out of space
B) The slave nodes are swapping.
C) The slave nodes, haven't sent a heartbeat in 60 minutes
D) DataNode service instance has crashed.

Solutions: