MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Java knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
__________ 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. | |
| 2. |
Which of the following works well with Avro? |
| A. | Lucene |
| B. | kafka |
| C. | MapReduce |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 3. |
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 | |
| 4. |
Avro schemas describe the format of the message and are defined using ______________ |
| A. | JSON |
| B. | XML |
| C. | JS |
| D. | All of the mentioned |
| Answer» B. XML | |
| 5. |
Apache _______ is a serialization framework that produces data in a compact binary format. |
| A. | Oozie |
| B. | Impala |
| C. | kafka |
| D. | Avro |
| Answer» E. | |
| 6. |
Serializaed object can be transferred via network. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Which of the following methods is not used while Serialization and DeSerialization? |
| A. | readObject() |
| B. | readExternal() |
| C. | readWriteObject() |
| D. | writeObject() |
| Answer» D. writeObject() | |
| 8. |
Which of the following methods is used to avoid serialization of new class whose super class already implements Serialization? |
| A. | writeObject() |
| B. | readWriteObject() |
| C. | writeReadObject() |
| D. | unSerializaedObject() |
| Answer» B. readWriteObject() | |
| 9. |
Default Serialization process cannot be overridden. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
If member does not implement serialization, which exception would be thrown? |
| A. | RuntimeException |
| B. | SerializableException |
| C. | NotSerializableException |
| D. | UnSerializedException |
| Answer» D. UnSerializedException | |
| 11. |
What type of members are not serialized? |
| A. | Private |
| B. | Protected |
| C. | Static |
| D. | Throwable |
| Answer» D. Throwable | |
| 12. |
How many methods Serializable has? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» E. | |
| 13. |
What is deserialization? |
| A. | Turning object in memory into stream of bytes |
| B. | Turning stream of bytes into an object in memory |
| C. | Turning object in memory into stream of bits |
| D. | Turning stream of bits into an object in memory |
| Answer» C. Turning object in memory into stream of bits | |
| 14. |
How an object can become serializable? |
| A. | If a class implements java.io.Serializable class |
| B. | If a class or any superclass implements java.io.Serializable interface |
| C. | Any object is serializable |
| D. | No object is serializable |
| Answer» C. Any object is serializable | |
| 15. |
___________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. | |
| 16. |
SERIALIZAED_OBJECT_CAN_BE_TRANSFERRED_VIA_NETWORK.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 17. |
-7?$ |
| A. | Hello |
| B. | 2.1E10 |
| C. | deserialization |
| Answer» C. deserialization | |
| 18. |
Which of the following works well with Avro ? |
| A. | Lucene |
| B. | kafka |
| C. | MapReduce |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 19. |
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 | |
| 20. |
____________ class accepts the values that the ModelCountMapper object has collected. |
| A. | AvroReducer |
| B. | Mapper |
| C. | AvroMapper |
| D. | None of the mentioned |
| Answer» B. Mapper | |
| 21. |
The ____________ class extends and implements several Hadoop-supplied interfaces. |
| A. | AvroReducer |
| B. | Mapper |
| C. | AvroMapper |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 22. |
The ____________ is an iterator which reads through the file and returns objects using the next() method. |
| A. | DatReader |
| B. | DatumReader |
| C. | DatumRead |
| D. | None of the mentioned |
| Answer» C. DatumRead | |
| 23. |
Avro schemas describe the format of the message and are defined using : |
| A. | JSON |
| B. | XML |
| C. | JS |
| D. | All of the mentioned |
| Answer» B. XML | |
| 24. |
What is serialization? |
| A. | Turning object in memory into stream of bytes |
| B. | Turning stream of bytes into an object in memory |
| C. | Turning object in memory into stream of bits |
| D. | Turning stream of bits into an object in memory |
| Answer» B. Turning stream of bytes into an object in memory | |
| 25. |
Which of these process occur automatically by the java runtime system? |
| A. | Serialization |
| B. | Garbage collection |
| C. | File Filtering |
| D. | All of the mentioned |
| Answer» B. Garbage collection | |