Hadoop interview questions part 3
Hadoop interview questions part 3
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Total Questions: 20
1. Which of the following phases occur simultaneously ?
Correct Answer is : Shuffle and Sort
2. Mapper and Reducer implementations can use the ________ to report progress or just indicate that they are alive.
Correct Answer is : Reporter
3. __________ is a generalization of the facility provided by the MapReduce framework to collect data output by the Mapper or the Reducer
Correct Answer is : OutputCollector
4. _________ is the primary interface for a user to describe a MapReduce job to the Hadoop framework for execution.
Correct Answer is : JobConf
5. Avro schemas are defined with _____
Correct Answer is : JSON
6. Point out the correct statement :
Correct Answer is : Avro provides functionality similar to systems such as Thrift
7. __________ facilitates construction of generic data-processing systems and languages.
Correct Answer is : Dynamic typing
8. With ______ we can store data and read it easily with various programming languages
Correct Answer is : Avro
9. Point out the wrong statement :
Correct Answer is : All of the mentioned
10. ________ are a way of encoding structured data in an efficient yet extensible format.
Correct Answer is : Protocol Buffers
11. Thrift resolves possible conflicts through _________ of the field.
Correct Answer is : Static number
12. Avro is said to be the future _______ layer of Hadoop.
Correct Answer is : RPC
13. When using reflection to automatically build our schemas without code generation, we need to configure Avro using :
Correct Answer is : Job.setReflect(jConf);
14. We can declare the schema of our data either in a ______ file.
Correct Answer is : SQL
15. Which of the following is a primitive data type in Avro ?
Correct Answer is : all of the mentioned
16. Point out the correct statement :
Correct Answer is : Records use the type name “record” and support three attributes
17. Avro supports ______ kinds of complex types.
Correct Answer is : 7
18. ________ are encoded as a series of blocks.
Correct Answer is : Arrays
19. Point out the wrong statement :
Correct Answer is : Unions may immediately contain other unions
20. ________ instances are encoded using the number of bytes declared in the schema.
Correct Answer is : Fixed
