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Total 240 Questions | Updated On: Nov 20, 2024

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Question 1

Michael, a Data Engineer Running a Data query to achieve Union of Data sets coming from Multi-ple data sources, later he figured out that Data processing query is taking more time than expected. He started analyzing the Query performance using query profile interface. He discovered & realized that he used UNION when the UNION ALL semantics was sufficient. Which Extra Data Processing Operator Michael figured out while doing query profile analysis in this case which helps him to identify this performance bottlenecks?

A : Aggregate

B : UNION ALL

C : Flatten

D : Join

E : Filter

Answer: A

Question 2

Which one of the below is true about clustering depth?

A : The smaller the average depth, the better clustered the table is with respect to the specified columns

B : The larger the average depth, the better clustered the table is with respect to the specified columns

C : The smaller the maximum depth, the better clustered the table is with respect to the specified columns

Answer: A

Question 3

Select the correct usage statements with regards to SQL UDF?

A : The body of a UDF cannot contain DDL statements or any DML statement other than SELECT.

B : Scalar functions (UDFs) have a limit of 500 input arguments.

C : When using a query expression in a SQL UDF, do not include a semicolon within the UDF body to terminate the query expression.

D : You can include only one query expression.

E : All of above are correct.

Answer: A

Question 4

Data Engineer wants to analyze query performance & looking out for profiling information, He went to Query/Operator Details also called Profile Overview of Query Profile Interface & searching for statistics attributes around I/O. Which of the following information he can’t get from there?

A : Percentage scanned from cache — the percentage of data scanned from the local disk cache.

B : Bytes written — bytes written (e.g. when loading into a table).

C : External bytes scanned — bytes read from an external object, e.g. a stage.

D : Bytes sent over the wireframe — amount of data sent over the wireframe

E : Bytes read from result — bytes read from the result object.

Answer: D

Question 5

Jeff, a Data Engineer, accessing elements in JSON object in its 3 data loading scripts, he unknow-ingly use the

upper case while accessing the elements. e.g.

Script 1 --> fruits:apple.sweet

Script 2 --> FRUITS:apple.sweet

Script 3 --> FRUITS:Apple.Sweet

Which are the correct statements?

A : Script 1 & Script 2 traverse path twill be treated same, but Script 2 will not.

B : Script 1,2,3 traverse path will treat in same way.

C : Script 1 & 3 traverse path will be treated in same way.

D : Script 2&3 traverse path will be same.

Answer: A

Page: 1 / 48

Total 240 Questions | Updated On: Nov 20, 2024

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