Exam Name: Hadoop 2.0 Certification exam for Pig and Hive Developer
Certification Provider: Hortonworks
Corresponding Certification: HCAHD
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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Hadoop Fundamentals & Architecture | 20% | - MapReduce concepts and job lifecycle - HDFS operations and file management - YARN architecture and job execution |
| Data Ingestion | 25% | - Import/export data using Sqoop - Load data into HDFS from external sources - Ingest streaming data with Flume |
| Apache Hive Development | 25% | - Use Hive functions, views, and metastore - Create and manage Hive tables, partitions, and buckets - Write and optimize HiveQL queries |
| Apache Pig Development | 30% | - Write and optimize Pig Latin scripts - Data transformation, filtering, joining, and aggregation - Debug and tune Pig jobs |
Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:
Can you use MapReduce to perform a relational join on two large tables sharing a key? Assume that the two tables are formatted as comma-separated files in HDFS.
- A. Yes, but only if one of the tables fits into memory
- B. Yes.
- C. No, MapReduce cannot perform relational operations.
- D. Yes, so long as both tables fit into memory.
- E. No, but it can be done with either Pig or Hive.
Correct Answer: B 🗳️
Explanation: Only visible for PassLeaderVCE members. You can sign-up / login (it's free).
Which one of the following Hive commands uses an HCatalog table named x?
- A. SELECT * FROM x;
- B. Hive commands cannot reference an HCatalog table
- C. SELECT x.-FROM org.apache.hcatalog.hive.HCatLoader('x');
- D. SELECT * FROM org.apache.hcatalog.hive.HCatLoader('x');
Correct Answer: D 🗳️
Which describes how a client reads a file from HDFS?
- A. The client contacts the NameNode for the block location(s). The NameNode then queries the DataNodes for block locations. The DataNodes respond to the NameNode, and the NameNode redirects the client to the DataNode that holds the requested data block(s). The client then reads the data directly off the DataNode.
- B. The client queries all DataNodes in parallel. The DataNode that contains the requested data responds directly to the client. The client reads the data directly off the DataNode.
- C. The client queries the NameNode for the block location(s). The NameNode returns the block location(s) to the client. The client reads the data directory off the DataNode(s).
- D. The client contacts the NameNode for the block location(s). The NameNode contacts the DataNode that holds the requested data block. Data is transferred from the DataNode to the NameNode, and then from the NameNode to the client.
Correct Answer: C 🗳️
Explanation: Only visible for PassLeaderVCE members. You can sign-up / login (it's free).
Review the following data and Pig code.
M,38,95111 F,29,95060 F,45,95192 M,62,95102 F,56,95102
A = LOAD 'data' USING PigStorage('.') as (gender:Chararray, age:int, zlp:chararray);
B = FOREACH A GENERATE age;
Which one of the following commands would save the results of B to a folder in hdfs named myoutput?
- A. STORE A INTO 'myoutput' USING PigStorage(',');
- B. DUMP B using PigStorage('myoutput');
- C. STORE B INTO 'myoutput';
- D. DUMP B INTO 'myoutput';
Correct Answer: C 🗳️
Consider the following two relations, A and B.
A Pig JOIN statement that combined relations A by its first field and B by its second field would produce what output?
- A. 2 cherry Jim 2 2 cherry Chris 2 3 orange Terry 3 4 peach Brian 4
- B. 2 cherry 2 cherry 3 orange 4 peach
- C. 2 cherry Jim, Chris 3 orange Terry 4 peach Brian
- D. 2 Jim Chris 2 3 Terry 3 4 Brian 4
Correct Answer: A 🗳️
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