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Databricks Certified Professional Data Engineer Exam Sample Questions (Q189-Q194):

NEW QUESTION # 189
Data engineering team has a job currently setup to run a task load data into a reporting table every day at 8: 00 AM takes about 20 mins, Operations teams are planning to use that data to run a second job, so they access latest complete set of data. What is the best to way to orchestrate this job setup?

A. Use Auto Loader to run every 20 mins to read the initial table and set the trigger to once and create a second job
B. Add Operation reporting task in the same job and set the Data Engineering task to de-pend on Operations reporting task
C. Setup a second job to run at 8:20 AM in the same workspace
D. Add Operation reporting task in the same job and set the operations reporting task to depend on Data Engineering task
E. Setup a Delta live to table based on the first table, set the job to run in continuous mode

Answer: D

Explanation:
Explanation
The answer is Add Operation reporting task in the same job and set the operations reporting task to depend on Data Engineering task.

Diagram Description automatically generated with medium confidence

NEW QUESTION # 190
You have written a notebook to generate a summary data set for reporting, Notebook was scheduled using the job cluster, but you realized it takes 8 minutes to start the cluster, what feature can be used to start the cluster in a timely fashion so your job can run immediatley?

A. Setup an additional job to run ahead of the actual job so the cluster is running second job starts
B. Disable auto termination so the cluster is always running
C. Use the Databricks cluster pools feature to reduce the startup time
D. Use Databricks Premium edition instead of Databricks standard edition
E. Pin the cluster in the cluster UI page so it is always available to the jobs

Answer: C

Explanation:
Explanation
Cluster pools allow us to reserve VM's ahead of time, when a new job cluster is created VM are grabbed from the pool. Note: when the VM's are waiting to be used by the cluster only cost incurred is Azure. Databricks run time cost is only billed once VM is allocated to a cluster.
Here is a demo of how to setup a pool and follow some best practices,
Graphical user interface, text Description automatically generated

NEW QUESTION # 191
If E1 and E2 are two events, how do you represent the conditional probability given that E2 occurs given that
E1 has occurred?

A. P(E2)/P(E1)
B. P(E1)/P(E2)
C. P(E1+E2)/P(E1)
D. P(E2)/(P(E1+E2)

Answer: A

NEW QUESTION # 192
A data engineer needs to dynamically create a table name string using three Python varia-bles: region, store,
and year. An example of a table name is below when region = "nyc", store = "100", and year = "2021":
nyc100_sales_2021
Which of the following commands should the data engineer use to construct the table name in Py-thon?

A. "{region}+{store}+_sales_+{year}"
B. "{region}{store}_sales_{year}"
C. f"{region}+{store}+_sales_+{year}"
D. "{region}+{store}+"_sales_"+{year}"
E. f"{region}{store}_sales_{year}"

Answer: E

NEW QUESTION # 193
In order to use Unity catalog features, which of the following steps needs to be taken on man-aged/external tables in the Databricks workspace?

A. Copy data from workspace to unity catalog
B. Upgrade workspace to Unity catalog
C. Upgrade to DBR version 15.0
D. Enable unity catalog feature in workspace settings
E. Migrate/upgrade objects in workspace managed/external tables/view to unity catalog

Answer: E

Explanation:
Explanation
Upgrade tables and views to Unity Catalog - Azure Databricks | Microsoft Docs Managed table: Upgrade a managed to Unity Catalog External table: Upgrade an external table to Unity Catalog

NEW QUESTION # 194
......

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