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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

Question 1

What is the rule governing the formatting of the underlying filesystem in the hadoop cluster?

A. They can use different file system
B. they must all be left as formatted raw disk, hadoop format them automatically
C. They must all use the same file system but this does not need to be the same filesystem as the filesystem used by the namenode
D. They must all use the same filesystem as the namenode
E. They must all be left as unformatted, rawdisk;hadoop uses raw unformatted disk for HDFS

Question 2

You set mapred.tasktracker.reduce.tasks.maximum to a value of 4 on a cluster running mapreduce v1 (MRv1). How many reducers will run for any given job?

A. The number of reducer's for any given job is set by the developer
B. Four reducer's will run. Once set by the cluster administrator, this parameter can't be overridden
C. Maximum of 4 reducers, but the actual number of reducers that run for any given job is based on the volume of input data
D. a maximum of 4 reducer's, but the actual number of reducer's that run for any given job is based on the volume intermediate data.

Question 3

Your company stores user profile records in an OLTP database. You want to join these records with webserver logs. You have already ingested into the hadoop file system. What is the best way to obtain and ingest these user records?

A. Ingest with SQL import
B. Ingest using hives LOAD DATA command
C. Ingest with hadoop streaming
D. Ingest with Pig's Load Command
E. Ingest using the HDFS put command
F. Ingest with flume agents

Question 4

What occurs when you run a hadoop job specifying output directory for job output which already exists in HDFS?

A. An error will occur immediately because the output directory must not already exist.
B. an error will occur after the mappers have completed but before any reducers begin to run because the output path must not exist during the shuffle and sort.
C. the job will run successfully output from the reducers will be placed in a directory called job output -1
D. the job will run successfully. Output from the reducers will override the contents of existing directory

Question 5

The most important consideration for slave nodes in a Hadoop cluster running production jobs that require short turnaround times is:

A. The ratio between the amount of memory and the number of disk drives.
B. The ratio between the number of processor cores and number of disk drives.
C. The ratio between the number of processor cores and total storage capacity.
D. The ratio between the amount of memory and the total storage capacity.
E. The ratio between the number of processor cores and the amount of memory.

Solutions: