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Microsoft DP-203 Exam Sample Questions

Question # 1

You are building an Azure Stream Analytics job to identify how much time a user spends interacting with a feature on a webpage. The job receives events based on user actions on the webpage. Each row of data represents an event. Each event has a type of either 'start' or 'end'. You need to calculate the duration between start and end events. How should you complete the query? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.

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Question # 2

You are building an Azure Data Factory solution to process data received from Azure Event Hubs, and then ingested into an Azure Data Lake Storage Gen2 container.The data will be ingested every five minutes from devices into JSON files. The files have the following naming pattern. /{deviceType}/in/{YYYY}/{MM}/{DD}/{HH}/{deviceID}_{YYYY}{MM}{DD}HH}{mm}.json You need to prepare the data for batch data processing so that there is one dataset per hour per deviceType. The solution must minimize read times. How should you configure the sink for the copy activity? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.

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Question # 3

You are designing a dimension table for a data warehouse. The table will track the value of the dimension attributes over time and preserve the history of the data by adding new rows as the data changes. Which type of slowly changing dimension (SCD) should use?

A. Type 0

B. Type 1

C. Type 2

D. Type 3

Answer

C.

Type 2

Explanation: Type 2 - Creating a new additional record. In this methodology all history of
dimension changes is kept in the database. You capture attribute change by adding a new
row with a new surrogate key to the dimension table. Both the prior and new rows contain
as attributes the natural key(or other durable identifier). Also 'effective date' and 'current
indicator' columns are used in this method. There could be only one record with current
indicator set to 'Y'. For 'effective date' columns, i.e. start_date and end_date, the end_date
for current record usually is set to value 9999-12-31. Introducing changes to the
dimensional model in type 2 could be very expensive database operation so it is not
recommended to use it in dimensions where a new attribute could be added in the future.
https://www.datawarehouse4u.info/SCD-Slowly-Changing-Dimensions.html

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Question # 4

You implement an enterprise data warehouse in Azure Synapse Analytics. You have a large fact table that is 10 terabytes (TB) in size. Incoming queries use the primary key SaleKey column to retrieve data as displayed in the following table: You need to distribute the large fact table across multiple nodes to optimize performance of the table. Which technology should you use?

A. hash distributed table with clustered index

B. hash distributed table with clustered Columnstore index

C. round robin distributed table with clustered index

D. round robin distributed table with clustered Columnstore index

E. heap table with distribution replicate

Answer

B.

hash distributed table with clustered Columnstore index

Explanation:
Hash-distributed tables improve query performance on large fact tables.
Columnstore indexes can achieve up to 100x better performance on analytics and data
warehousing workloads
and up to 10x better data compression than traditional rowstore indexes.
Reference:
https://docs.microsoft.com/en-us/azure/sql-data-warehouse/sql-data-warehouse-tablesdistribute
https://docs.microsoft.com/en-us/sql/relational-databases/indexes/columnstore-indexesquery-
performance

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Question # 5

You are designing a monitoring solution for a fleet of 500 vehicles. Each vehicle has a GPS tracking device that sends data to an Azure event hub once per minute. You have a CSV file in an Azure Data Lake Storage Gen2 container. The file maintains the expected geographical area in which each vehicle should be. You need to ensure that when a GPS position is outside the expected area, a message is added to another event hub for processing within 30 seconds. The solution must minimize cost. What should you include in the solution? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point. Question No : 69 HOTSPOT - (Topic 3) Microsoft DP-203 : Practice Test 77

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