Apache-Hadoop-Developerの無料問題集（110題）、Apache-Hadoop-Developer認定試験参考書

Hortonworks Apache-Hadoop-Developer 問題集

試験コード：Apache-Hadoop-Developer

試験名称：Hadoop 2.0 Certification exam for Pig and Hive Developer

最近更新時間：2024-04-11

問題と解答：全110問

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質問 1：
You want to understand more about how users browse your public website, such as which pages they visit prior to placing an order. You have a farm of 200 web servers hosting your website. How will you gather this data for your analysis?
A. Ingest the server web logs into HDFS using Flume.
B. Write a MapReduce job, with the web servers for mappers, and the Hadoop cluster nodes for reduces.
C. Sample the weblogs from the web servers, copying them into Hadoop using curl.
D. Channel these clickstreams inot Hadoop using Hadoop Streaming.
E. Import all users' clicks from your OLTP databases into Hadoop, using Sqoop.
正解：A

質問 2：
To process input key-value pairs, your mapper needs to lead a 512 MB data file in memory. What is the best way to accomplish this?
A. Serialize the data file, insert in it the JobConf object, and read the data into memory in the configure method of the mapper.
B. Place the data file in the DataCache and read the data into memory in the configure method of the mapper.
C. Place the data file in the DistributedCache and read the data into memory in the map method of the mapper.
D. Place the data file in the DistributedCache and read the data into memory in the configure method of the mapper.
正解：B

質問 3：
Given the following Hive command:

Which one of the following statements is true?
A. The files in the mydata folder are moved to a subfolder of /apps/hive/wa re house
B. The files in the mydata folder are copied into Hive's underlying relational database
C. The files in the mydata folder are copied to a subfolder of /apps/hlve/warehouse
D. The files in the mydata folder do not move from their current location In HDFS
正解：D

質問 4：
All keys used for intermediate output from mappers must:
A. Override isSplitable.
B. Be a subclass of FileInputFormat.
C. Implement a comparator for speedy sorting.
D. Implement a splittable compression algorithm.
E. Implement WritableComparable.
正解：E
解説: (Topexam メンバーにのみ表示されます)

質問 5：
Which one of the following statements describes the relationship between the NodeManager and the ApplicationMaster?
A. The NodeManager requests resources from the ApplicationMaster
B. The ApplicationMaster starts the NodeManager outside of a Container
C. The NodeManager creates an instance of the ApplicationMaster
D. The ApplicationMaster starts the NodeManager in a Container
正解：C

質問 6：
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, Chris 3 orange Terry 4 peach Brian
B. 2 Jim Chris 2 3 Terry 3 4 Brian 4
C. 2 cherry Jim 2 2 cherry Chris 2 3 orange Terry 3 4 peach Brian 4
D. 2 cherry 2 cherry 3 orange 4 peach
正解：C

質問 7：
Which of the following tool was designed to import data from a relational database into HDFS?
A. HCatalog
B. Flume
C. Ambari
D. Sqoop
正解：D

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Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer 認定 Apache-Hadoop-Developer 試験問題:

1. Which of the following tool was designed to import data from a relational database into HDFS?

A) HCatalog
B) Flume
C) Ambari
D) Sqoop

2. A client application creates an HDFS file named foo.txt with a replication factor of 3. Identify which best describes the file access rules in HDFS if the file has a single block that is stored on data nodes A, B and C?

A) The file can be accessed if at least one of the data nodes storing the file is available.
B) The file will be marked as corrupted if data node B fails during the creation of the file.
C) Each data node locks the local file to prohibit concurrent readers and writers of the file.
D) Each data node stores a copy of the file in the local file system with the same name as the HDFS file.

3. What is a SequenceFile?

A) A SequenceFile contains a binary encoding of an arbitrary number key-value pairs. Each key must be the same type. Each value must be same type.
B) A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable objects, in sorted order.
C) A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous writable objects.
D) A SequenceFile contains a binary encoding of an arbitrary number of homogeneous writable objects.

4. Which best describes how TextInputFormat processes input files and line breaks?

A) The input file is split exactly at the line breaks, so each RecordReader will read a series of complete lines.
B) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReaders of both splits containing the broken line.
C) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the end of the broken line.
D) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the beginning of the broken line.
E) Input file splits may cross line breaks. A line that crosses file splits is ignored.

5. Which one of the following Hive commands uses an HCatalog table named x?

A) SELECT * FROM x;
B) SELECT x.-FROM org.apache.hcatalog.hive.HCatLoader('x');
C) SELECT * FROM org.apache.hcatalog.hive.HCatLoader('x');
D) Hive commands cannot reference an HCatalog table

質問と回答：

質問 # 1
正解： D

質問 # 2
正解： A

質問 # 3
正解： A

質問 # 4
正解： D

質問 # 5
正解： C