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Microsoft Implementing Data Engineering Solutions Using Azure Databricks Sample Questions:

1. You have a Lakeflow Spark Declarative Pipelines (SDP) pipeline in Azure Databricks. The pipeline ingests transaction data into a table named Table1.
You need to ensure that in the event of an invalid record, the pipeline continues to run. The solution must meet the following requirements:
- Invalid records must NOT be written to Table1.
- Invalid records must be preserved for review.
- Minimize development effort.
What should you do?

A) Implement advanced logic to quarantine the invalid records.
B) Add a CHECKconstraint to Table1.
C) Define a pipeline expectation.
D) Run WHEREclauses in downstream queries to filter out invalid records.

2. Note: This section contains one or more sets of questions with the same scenario and problem. Each question presents a unique solution to the problem. You must determine whether the solution meets the stated goals. More than one solution in the set might solve the problem. It is also possible that none of the solutions in the set solve the problem.
After you answer a question in this section, you will NOT be able to return. As a result, these questions do not appear on the Review Screen.
You have an Azure Databricks workspace that is enabled for Unity Catalog and contains a Delta table named Orders.
You load the Orders table into an Apache Spark DataFrame named df.
You need to create a DataFrame that excludes rows where the order amount is null.
Solution: You run the following expression.
df.dropna(subset=["order_amount"])
Does this meet the goal?

A) No
B) Yes

3. What improves join performance for small lookup tables?

A) Shuffle join
B) Cartesian join
C) Sort merge join
D) Broadcast join

4. You have an Azure Databricks workspace.
You have an Apache Spark Structured Streaming job named Job1 that processes data continuously and fails periodically due to transient errors.
You need to ensure that Job1 meets the following requirements:
- Resumes processing from the point that Job1 failed
- Minimizes how long it takes to restart Job1
- Minimizes the costs to restart Job1
What should you do?

A) Add an alert and manually restart Job1.
B) Increase the minimum number of nodes in the cluster.
C) Decrease the retry interval.
D) Implement checkpointing.

5. You have an Azure Databricks workspace that contains a job in Lakeflow Jobs named Job1.
Job1 processes raw data files stored in Azure Storage.
New files arrive at unpredictable intervals.
You need to ensure that Job1 starts automatically when new files arrive and does NOT consume compute resources when no data is available.
Which type of job trigger should you use?

A) file arrival
B) continuous
C) scheduled
D) manual

Solutions: