Free Cloudera CCA-505 Practice Test & Real Exam Questions

Exam Code/Number: CCA-505
Exam Name/Title: Cloudera Certified Administrator for Apache Hadoop (CCAH) CDH5 Upgrade Exam
Certification Provider: Cloudera
Corresponding Certification: CCAH

Exam Questions: 45
Updated On: Aug 03, 2026

Question #1

You are the hadoop fs -put command to add a file "sales.txt" to HDFS. This file is small enough that it fits into a single block, which is replicated to three nodes in your cluster (with a replication factor of 3). One of the nodes holding this file (a single block) fails. How will the cluster handle the replication of this file in this situation/

A. The file will remain under-replicated until the administrator brings that nodes back online

B. The file will be re-replicated automatically after the NameNode determines it is under replicated based on the block reports it receives from the DataNodes

C. This file will be immediately re-replicated and all other HDFS operations on the cluster will halt until the cluster's replication values are restored

D. The cluster will re-replicate the file the next time the system administrator reboots the NameNode daemon (as long as the file's replication doesn't fall two)

Discussion 0

Correct Answer: C Vote an answer

Question #2

Which two are Features of Hadoop's rack topology?

A. Rack location is considered in the HDFS block placement policy

B. Configuration of rack awareness is accomplished using a configuration file. You cannot use a rack topology script.

C. Hadoop gives preference to Intra rack data transfer in order to conserve bandwidth

D. HDFS is rack aware but MapReduce daemons are not

E. Even for small clusters on a single rack, configuring rack awareness will improve performance.

Discussion 0

Correct Answer: A,E Vote an answer

Question #3

You are running a Hadoop cluster with MapReduce version 2 (MRv2) on YARN. You consistently see that MapReduce map tasks on your cluster are running slowly because of excessive garbage collection of JVM, how do you increase JVM heap property to 3GB to optimize performance?

A. Yarn.application.child.java.opts-Xax3072m

B. Mapreduce.map.java.opts=-Xmx3072m

C. Yarn.application.child.java.opts=-3072m

D. Mapreduce.map.java.opts=-Xms3072m

Discussion 0

Correct Answer: B Vote an answer

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Question #4

You want a node to only swap Hadoop daemon data from RAM to disk when absolutely necessary. What should you do?

A. Set the ram.swap parameter to o in core-site.xml

B. Set vm.swappiness to o in /etc/sysctl.conf

C. Delete the /dev/vmswap file on the node

D. Delete the /etc/swap file on the node

E. Delete the /swapfile file on the node

Discussion 0

Correct Answer: B Vote an answer

Question #5

Assume you have a file named foo.txt in your local directory. You issue the following three commands:
Hadoop fs -mkdir input
Hadoop fs -put foo.txt input/foo.txt
Hadoop fs -put foo.txt input
What happens when you issue that third command?

A. You get an error message telling you that foo.txt already exists, and asking you if you would like to overwrite

B. You get an error message telling you that input is not a directory

C. You get a warning that foo.txt is being overwritten

D. The file is uploaded and stored as a plain named input

E. You get a error message telling you that foo.txt already exists. The file is not written to HDFS

F. The write silently fails

G. The write succeeds, overwriting foo.txt in HDFS with no warning

Discussion 0

Correct Answer: E Vote an answer

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