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Cloudera Certified Administrator for Apache Hadoop CDH4: CCA-410 Exam
"Cloudera Certified Administrator for Apache Hadoop CDH4", also known as CCA-410 exam, is a Cloudera Certification. With the complete collection of questions and answers, BraindumpsPass has assembled to take you through 97 Q&As to your CCA-410 Exam preparation. In the CCA-410 exam resources, you will cover every field and category in CCAH Certification helping to ready you for your successful Cloudera Certification.
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Cloudera CCA-410 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Cluster Monitoring and Troubleshooting | - Fault diagnosis
|
| Topic 2: HDFS Administration | - Filesystem management
|
| Topic 3: Cluster Installation and Configuration | - CDH4 setup
|
| Topic 4: Hadoop Cluster Architecture (CDH4) | - Cluster roles and services
|
| Topic 5: Security and Cluster Operations | - Operational maintenance
|
| Topic 6: Data Processing Tools and Ecosystem | - Data ingestion and processing tools
|
Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:
What is the recommended disk configuration for slave nodes in your Hadoop cluster with 6 x 2 TB hard drives?
- A. RAID 10
- B. RAID 5
- C. RAID 1+0
- D. JBOD
Answer: D
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Your cluster has nodes in seven racks, and you have provided a rack topology script. What is Hadoop's block placement policy, assuming a block replication factor of three?
- A. One copy of the block is written to a node in each of three racks
- B. Because there are seven racks the block is written to a node on each rack
- C. All three of the block are written to nodes on the same rack
- D. One copy of the block is written to a node in one rack; two copies are written to two nodes in a different rack
Answer: D
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What metadata is stored on a DataNode when a block is written to it?
- A. Node location of each block belonging to the same namespace.
- B. None. Only the block itself is written.
- C. Checksums for the data in the block, as a separate file.
- D. Information on the file's location in HDFS.
Answer: A
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A client application opens a file write stream on your cluster. Which two metadata changes occur during a file write?
- A. the change is written to the fsimage file
- B. The change is written to the namenode disk
- C. the change is written to the secondary namenode
- D. the metadata in Ram on the namenode is flushed to disk
- E. The metadata in a Ram on the name node is updated
- F. The change is written to the edits file
- G. the namenode triggers a block report to update block locations in the edits file
Answer: D,F
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Once a client application validates its identity and is granted access to file in a cluster. What is the reminder of read path back to the client?
- A. the namenode maps the read request against the block locations in its stored metadata and reads those blocks from the datanodes. The client applications then read the block from the namenode
- B. The namenode gives the client the block ID's and a list of Datanodes on which those blocks are found. And the application reads the block directly from the datanodes
- C. The namenode maps the read request against the block locations in it's stored metadata the block id's are stored by their distance to the client and moved to the datanode closest to the client according to hadoop rac topology. The client application then reads the blocks from the single datanode
Answer: B
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