MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Apache Hadoop knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
__________ typically compresses files to within 10% to 15% of the best available techniques. |
| A. | LZO |
| B. | Bzip2 |
| C. | Gzip |
| D. | All of the mentioned |
| Answer» C. Gzip | |
| 2. |
_________ stores its metadata on multiple disks that typically include a non-local file server. |
| A. | DataNode |
| B. | NameNode |
| C. | ActionNode |
| D. | None of the mentioned |
| Answer» C. ActionNode | |
| 3. |
The HDFS file system is temporarily unavailable whenever the HDFS ________ is down. |
| A. | DataNode |
| B. | NameNode |
| C. | ActionNode |
| D. | None of the mentioned |
| Answer» C. ActionNode | |
| 4. |
__________ tools is used to generate proxy objects in Java to easily work with the objects. |
| A. | Lucene |
| B. | kafka |
| C. | MapReduce |
| D. | Avro |
| Answer» E. | |
| 5. |
The ________ method in the ModelCountReducer class “reduces” the values the mapper collects into a derived value |
| A. | count |
| B. | add |
| C. | reduce |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 6. |
The _________ as just the value field append(value) and the key is a LongWritable that contains the record number, count + 1. |
| A. | SetFile |
| B. | ArrayFile |
| C. | BloomMapFile |
| D. | None of the mentioned |
| Answer» C. BloomMapFile | |
| 7. |
____________ data file takes is based on avro serialization framework which was primarily created for hadoop. |
| A. | Oozie |
| B. | Avro |
| C. | cTakes |
| D. | Lucene |
| Answer» C. cTakes | |
| 8. |
_____________ are used between blocks to permit efficient splitting of files for MapReduce processing. |
| A. | Codec |
| B. | Data Marker |
| C. | Synchronization markers |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 9. |
Avro messages are framed as a list of _________ |
| A. | buffers |
| B. | frames |
| C. | rows |
| D. | none of the mentioned |
| Answer» C. rows | |
| 10. |
Avro supports ______ kinds of complex types. |
| A. | 3 |
| B. | 4 |
| C. | 6 |
| D. | 7 |
| Answer» E. | |
| 11. |
________ permits data written by one system to be efficiently sorted by another system. |
| A. | Complex Data type |
| B. | Order |
| C. | Sort Order |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 12. |
We can declare the schema of our data either in a ______ file. |
| A. | JSON |
| B. | XML |
| C. | SQL |
| D. | R |
| Answer» D. R | |
| 13. |
________ instances are encoded using the number of bytes declared in the schema. |
| A. | Fixed |
| B. | Enum |
| C. | Unions |
| D. | Maps |
| Answer» B. Enum | |
| 14. |
When using reflection to automatically build our schemas without code generation, we need to configure Avro using : |
| A. | AvroJob.Reflect(jConf); |
| B. | AvroJob.setReflect(jConf); |
| C. | Job.setReflect(jConf); |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |