MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Hadoop knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Hadoop has a library class, org.apache.hadoop.mapred.lib.FieldSelectionMapReduce, that effectively allows you to process text data like the unix ______ utility. |
| A. | Copy |
| B. | Cut |
| C. | Paste |
| D. | Move |
| Answer» C. Paste | |
| 2. |
Which of the following class is provided by the Aggregate package? |
| A. | Map |
| B. | Reducer |
| C. | Reduce |
| D. | None of the mentioned |
| Answer» C. Reduce | |
| 3. |
Which of the following class provides a subset of features provided by the Unix/GNU Sort? |
| A. | KeyFieldBased |
| B. | KeyFieldComparator |
| C. | KeyFieldBasedComparator |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 4. |
To set an environment variable in a streaming command use ____________ |
| A. | -cmden EXAMPLE_DIR=/home/example/dictionaries/ |
| B. | -cmdev EXAMPLE_DIR=/home/example/dictionaries/ |
| C. | -cmdenv EXAMPLE_DIR=/home/example/dictionaries/ |
| D. | -cmenv EXAMPLE_DIR=/home/example/dictionaries/ |
| Answer» D. -cmenv EXAMPLE_DIR=/home/example/dictionaries/ | |
| 5. |
Which of the following Hadoop streaming command option parameter is required? |
| A. | output directoryname |
| B. | mapper executable |
| C. | input directoryname |
| D. | all of the mentioned |
| Answer» E. | |
| 6. |
Which of the following class is provided by Aggregate package ? |
| A. | Map |
| B. | Reducer |
| C. | Reduce |
| D. | None of the mentioned |
| Answer» C. Reduce | |
| 7. |
Which of the following class provides a subset of features provided by the Unix/GNU Sort ? |
| A. | KeyFieldBased |
| B. | KeyFieldComparator |
| C. | KeyFieldBasedComparator |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 8. |
______________ class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys. |
| A. | KeyFieldPartitioner |
| B. | KeyFieldBasedPartitioner |
| C. | KeyFieldBased |
| D. | None of the mentioned |
| Answer» C. KeyFieldBased | |
| 9. |
The ________ option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files. |
| A. | archives |
| B. | files |
| C. | task |
| D. | none of the mentioned |
| Answer» B. files | |
| 10. |
To set an environment variable in a streaming command use: |
| A. | -cmden EXAMPLE_DIR=/home/example/dictionaries/ |
| B. | -cmdev EXAMPLE_DIR=/home/example/dictionaries/ |
| C. | -cmdenv EXAMPLE_DIR=/home/example/dictionaries/ |
| D. | -cmenv EXAMPLE_DIR=/home/example/dictionaries/ |
| Answer» D. -cmenv EXAMPLE_DIR=/home/example/dictionaries/ | |
| 11. |
Which of the following Hadoop streaming command option parameter is required ? |
| A. | output directoryname |
| B. | mapper executable |
| C. | input directoryname |
| D. | all of the mentioned |
| Answer» E. | |
| 12. |
Streaming supports streaming command options as well as _________ command options. |
| A. | generic |
| B. | tool |
| C. | library |
| D. | task |
| Answer» B. tool | |