JUnit interview questions part 4
JUnit interview questions part 4
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Total Questions: 20
1. Documents enter a multi-stage __________ that transforms the documents into an aggregated result.
Correct Answer is : Suite
2. The most basic pipeline stages provide __________ that operate like queries.
Correct Answer is : The test runner automatically creates a Suite
3. Pipeline stages can use __________ for tasks such as calculating the average or concatenating a string.
Correct Answer is : Runner
4. Map-reduce uses custom __________ functions to perform the map and reduce operations.
Correct Answer is : static Test suite() method
5. Which of the following operation can be optionally used for map reduce ?
Correct Answer is : org.junit.runners.Suite.class
6. The aggregation pipeline can use ___________ to improve its performance during some of its stages.
Correct Answer is : @SuiteClasses
7. To handle large datasets, set _________ option to true to enable writing data to temporary files.
Correct Answer is : @SuiteClasses(value={Test1.class,Test2.class})
8. ________ deconstructs an array field from the input documents to output a document for each element.
Correct Answer is : Build
9. ________ applies an expression to each item in an array and returns an array with the applied results.
Correct Answer is : No
10. Which of the following accepts named parameters ?
Correct Answer is : expected
11. String expressions, with the exception of ________ only have a well-defined behavior for strings of ASCII characters.
Correct Answer is : IfBlankAttribute
12. ___________ returns either the non-null result of the first expression.
Correct Answer is : IfTrueAttribute
13. Which of the following returns the value that results from applying an expression to the last document ?
Correct Answer is : ChainableReader
14. Which of the following stages cannot appear multiple times in a pipeline ?
Correct Answer is : BaseFilterReader
15. Aggregation expressions use ______ path to access fields in the input documents.
Correct Answer is : BaseParamFilterReader
16. Which of the following statement is equivalent to “$$CURRENT.“?
Correct Answer is : ClassConstants
17. ______ binds variables for use in the specified expression.
Correct Answer is : HeadFilter
18. In the vars assignment block, ________ refers to the value of an externally defined variable low .
Correct Answer is : ProjectHelper2
19. To avoid treating numeric or boolean literals as projection flags, use the _______ expression to wrap the numeric or boolean literals.
Correct Answer is : SingleCheckExecutor
20. MongoDB treats the literals as projection flags, valid only in the _______ stage.
Correct Answer is : ExecutorService
