This set of Hadoop Multiple Choice Questions & Answers (MCQs) focuses on “Thrift with Hadoop-1”.
1. Which of the following project is interface definition language for hadoop ?
a) Oozie
b) Mahout
c) Thrift
d) Impala
View Answer
Explanation: Thrift is an interface definition language and binary communication protocol that is used to define and create services for numerous languages.
2. Point out the correct statement :
a) Thrift is developed for scalable cross-language services development
b) Thrift includes a complete stack for creating clients and servers
c) The top part of the Thrift stack is generated code from the Thrift definition
d) All of the mentioned
View Answer
Explanation: The services generate from this file client and processor code.
3. __________ is used as a remote procedure call (RPC) framework for facebook.
a) Oozie
b) Mahout
c) Thrift
d) Impala
View Answer
Explanation: In contrast to built-in types, created data structures are sent as result in generated code.
4. Which of the following is a straightforward binary format ?
a) TCompactProtocol
b) TDenseProtocol
c) TBinaryProtocol
d) TSimpleJSONProtocol
View Answer
Explanation: TBinaryProtocol is not optimized for space efficiency.
5. Point out the wrong statement :
a) With Thrift, it is not possible to define a service and change the protocol and transport without recompiling the code.
b) Thrift includes server infrastructure to tie protocols and transports together, like blocking, non-blocking, and multi threaded servers.
c) Thrift supports a number of protocols for service definition
d) None of the mentioned
View Answer
Explanation: The underlying I/O part of the stack is differently implemented for different languages.
6. Which of the following is a more compact binary format ?
a) TCompactProtocol
b) TDenseProtocol
c) TBinaryProtocol
d) TSimpleJSONProtocol
View Answer
Explanation: TCompactProtocol is typically more efficient to process as well.
7. Which of the following format is similar to TCompactProtocol ?
a) TCompactProtocol
b) TDenseProtocol
c) TBinaryProtocol
d) TSimpleJSONProtocol
View Answer
Explanation: In TDenseProtocol,stripping off the meta information from what is transmitted.
8. ________ is a write-only protocol that cannot be parsed by Thrift.
a) TCompactProtocol
b) TDenseProtocol
c) TBinaryProtocol
d) TSimpleJSONProtocol
View Answer
Explanation: TSimpleJSONProtocol drops metadata using JSON. Suitable for parsing by scripting languages.
9. Which of the following Uses JSON for encoding of data ?
a) TCompactProtocol
b) TDenseProtocol
c) TBinaryProtocol
d) None of the mentioned
View Answer
Explanation: TJSONProtocol is uses JSON for encoding of data.
10. _____________ is a human-readable text format to aid in debugging.
a) TMemory
b) TDebugProtocol
c) TBinaryProtocol
d) TSimpleJSONProtocol
View Answer
Explanation: TBinaryProtocol is faster to process than the text protocol but more difficult to debug.
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