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Microsoft DP-900 Practice Test - Questions Answers, Page 4

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DRAG DROP Your company plans to load data from a customer relationship management (CRM) system to a data warehouse by using an extract, load, and transform (ELT) process. Where does data processing occur for each stage of the ELT process? To answer, drag the appropriate locations to the correct stages. Each location may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content. NOTE: Each correct selection is worth one point.
DRAG DROP Match the database normalization terms to the appropriate descriptions. To answer, drag the appropriate term from the column on the left to its description on the right. Each term may be used once, more than once, or not at all. NOTE: Each correct match is worth one point.
DRAG DROP Match the Azure Data Lake Storage terms to the appropriate levels in the hierarchy. To answer, drag the appropriate term from the column on the left to its level on the right. Each term may be used once, more than once, or not at all. NOTE: Each correct match is worth one point.
HOTSPOT To complete the sentence, select the appropriate option in the answer area.
Which clause should you use in a SELECT statement to combine rows in one table with rows in another table?
You need to create a visualization of running sales totals per quarter as shown in the following exhibit. What should you create in Power BI Desktop?
HOTSPOT Select the answer that correctly completes the sentence.
DRAG DROP You have a table named Sales that contains the following data. You need to query the table to return the average sales amount per day. The output must produce the following results. How should you complete the query? To answer, drag the appropriate values to the correct targets. Each value may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content. NOTE: Each correct selection is worth one point.
DRAG DROP Match the types of activities to the appropriate Azure Data Factory activities. To answer, drag the appropriate activity type from the column on the left to its Data Factory activity on the right. Each activity type may be used once, more than once, or not at all. NOTE: Each correct match is worth one point.
What is a benefit of the Azure Cosmos DB Table API as compared to Azure Table storage?

Question 31

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HOTSPOT

To complete the sentence, select the appropriate option in the answer area.


Question 31
Correct answer: Question 31

Explanation:

Reference:

https://demand-planning.com/2020/01/20/the-differences-between-descriptive-diagnostic-predictive-cognitive-analytics/

Question 32

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For each of the following statements, select Yes if the statement is true. Otherwise, select No.

NOTE: Each correct selection is worth one point.


Question 32
Correct answer: Question 32

Explanation:

Reference:

https://www.sqlshack.com/what-is-database-normalization-in-sql-server/

Question 33

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To complete the sentence, select the appropriate option in the answer area.


Question 33
Correct answer: Question 33

Explanation:

Extract, transform, and load (ETL) is a data pipeline used to collect data from various sources, transform the data according to business rules, and load it into a destination data store.Reference: https://docs.microsoft.com/en-us/azure/ architecture/data-guide/relational-data/etl

Question 34

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To complete the sentence, select the appropriate option in the answer area.


Question 34
Correct answer: Question 34

Explanation:

Reference:

https://www.bmc.com/blogs/what-is-batch-processing-batch-processing-explained/

Question 35

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HOTSPOT

To complete the sentence, select the appropriate option in the answer area.


Question 35
Correct answer: Question 35

Explanation:

Reference:

https://azure.microsoft.com/en-us/services/cognitive-services/speech-services/

Question 36

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You have the following JSON document.

Use the drop-down menus to select the answer choice that completes each statement based on the information presented in the JSON document.

NOTE: Each correct selection is worth one point.


Question 36
Correct answer: Question 36

Explanation:

Reference:

https://www.w3schools.com/js/js_json_arrays.asp

https://www.w3schools.com/js/js_json_objects.asp

Question 37

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You are reviewing the data model shown in the following exhibit.

Use the drop-down menus to select the answer choice that completes each statement based on the information presented in the graphic.

NOTE: Each correct selection is worth one point


Question 37
Correct answer: Question 37

Explanation:

Box 1: star schema In computing, the star schema is the simplest style of data mart schema and is the approach most widely used to develop data warehouses and dimensional data marts. The star schema consists of one or more fact tables referencing any number of dimension tables. The star schema is an important special case of the snowflake schema, and is more effective for handling simpler queries.

Example:

Incorrect Answers:

The data in the question is not normalized.

The snowflake schema is a variation of the star schema, featuring normalization of dimension tables. Example:

Note: A snowflake schema is a logical arrangement of tables in a multidimensional database such that the entity relationship diagram resembles a snowflake shape. The snowflake schema is represented by centralized fact tables which are connected to multiple dimensions.[citation needed]. "Snowflaking" is a method of normalizing the dimension tables in a star schema. When it is completely normalized along all the dimension tables, the resultant structure resembles a snowflake with the fact table in the middle.

Box 2: dimension

The star schema consists of one or more fact tables referencing any number of dimension tables.

Reference:

https://docs.microsoft.com/en-us/azure/synapse-analytics/sql-data-warehouse/sql-data-warehouse-tables-overview

https://en.wikipedia.org/wiki/Star_schema

https://en.wikipedia.org/wiki/Snowflake_schema

https://azure.microsoft.com/en-us/blog/data-models-within-azure-analysis-services-and-power-bi/

Question 38

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HOTSPOT

You have the following JSON document.

Use the drop-down menus to select the answer choice that completes each statement based on the information presented in the JSON document.

NOTE: Each correct selection is worth one point.


Question 38
Correct answer: Question 38

Explanation:

Reference:

https://www.w3schools.com/js/js_json_arrays.asp

https://www.w3schools.com/js/js_json_objects.asp

Question 39

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To complete the sentence, select the appropriate option in the answer area.


Question 39
Correct answer: Question 39

Explanation:

Reference:

https://docs.microsoft.com/en-us/sql/relational-databases/indexes/clustered-and-nonclustered-indexes-described?view=sql-server-ver15

Question 40

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HOTSPOT

To complete the sentence, select the appropriate option in the answer area.


Question 40
Correct answer: Question 40

Explanation:

Disadvantages of non-relational databases include: Data Consistency — non-relational databases do not perform ACID transactions.

Note: Relational databases are optimized for writes. They are optimized for consistency and availability. Advantages of relational databases include simplicity, ease of data retrieval, data integrity, and flexibility.

Incorrect Answers:

Use a relational database when data that you work with is structured, and the structure is not subject to frequent changes.

Use Cloud storage (no relational database) for geographically distributed writes.

Reference:

https://towardsdatascience.com/choosing-the-right-database-c45cd3a28f77

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