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| Certification Vendor: | Cloudera |
| Exam Name: | Cloudera Certified Administrator for Apache Hadoop CDH4 |
| Exam Number: | CCA-410 |
| Related Certifications: | CCA-470 CCD-410 CCP |
| Certificate Validity Period: | 2 years |
| Real Exam Qty: | 60-70 |
| Exam Format: | Multiple Choice, Scenario-based |
| Available Languages: | English |
| Passing Score: | 70% |
| Exam Price: | $295 USD |
| Exam Duration: | 90 minutes |
| Recommended Training: | Cloudera Administrator Training for Apache Hadoop |
| Exam Registration: | Cloudera Training & Certification |
| Sample Questions: | Cloudera CCA-410 Sample Questions |
| Exam Way: | Proctored online or at authorized test centers; retired since October 31, 2021 |
| Pre Condition: | Basic Linux administration knowledge, understanding of Hadoop ecosystem concepts |
| Official Syllabus URL: | https://www.cloudera.com/services-and-support/training/certification/faq.html |
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cluster Management & Monitoring | 25% | - Starting/stopping services - Managing nodes and daemons - Monitoring health and logs - Capacity and performance planning |
| Topic 2: HDFS Operations & High Availability | 20% | - Replication and block management - File system maintenance - NameNode and DataNode management - HDFS High Availability (HA) |
| Topic 3: Hadoop Cluster Installation & Configuration | 30% | - MapReduce v1 configuration - HDFS architecture and configuration - Network and OS tuning - CDH4 deployment |
| Topic 4: Troubleshooting & Optimization | 10% | - Common error diagnosis - Performance tuning - Job failure resolution |
| Topic 5: Security & Data Governance | 15% | - Data protection and backup - Kerberos authentication - Authorization and permissions |
1. Cluster Summary
45 files and directories, 12 blocks = 57 total. Heap Size is 15.31 MB / 193.38MB(7%)
Refer to the above screenshot.
You configure the Hadoop cluster with seven DataNodes and the NameNode's web UI displays the details shown in the exhibit.
What does this tells you?
A) One physical host crashed.
B) Your cluster has lost all HDFS data which had blocks stored on the dead DataNode.
C) The HDFS cluster is in the safe mode.
D) The DataNode JVM on one host is not active.
2. The failure of which daemon makes HDFS unavailable on a cluster running MapReduce v1 (MRv1)?
A) Application Manager
B) Resource Manager
C) DataNode
D) Secondary NameNode
E) Node Manager
F) NameNode
3. Your Hadoop cluster has 12 slave nodes, a block size set to 64MB, and a replication factor of three.
Choose which best describes how the Hadoop Framework distributes block writes into HDFS from a Reducer outputting a 150MB file?
A) The Reducer will generate nine blocks and write them randomly to nodes throughout the cluster.
B) Reducers don't write blocks into HDFS
C) The Reducer will generate twelve blocks and write them to slave nodes nearest the node on which the Reducer runs.
D) The slave node on which the Reducer runs gets the first copy of every block written. Other block replicas will be placed on other nodes.
4. Identify two features/issues that MapReduce v2 (MRv2/YARN) is designed to address:
A) Single point of failure in the NameNode.
B) Resource pressure on the JobTrackr
C) HDFS latency.
D) Ability to run frameworks other than MapReduce, such as MPI.
E) Reduce complexity of the MapReduce APIs.
F) Standardize on a single MapReduce API.
5. Your Hadoop cluster contains nodes in three racks. Choose which scenario results if you leave the dfs.hosts property in the NameNode's configuration file empty (blank)?
A) Any machine running the DataNode daemon can immediately join the cluster.
B) The NameNode will update dfs.hosts property to include machines running the DataNode daemon on the next NameNode reboot or with a dfsadmin -refreshNodes.
C) No new can be added to the cluster until you specify them in the dfs.hosts file.
D) Presented with a blank dfs.hosts property, the NameNode will permit DataNodes specified in mapred.hosts to join the cluster.
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: F | Question # 3 Answer: D | Question # 4 Answer: B,D | Question # 5 Answer: C |
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