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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Secure and govern Unity Catalog objects | 15-20% | - Implement governance and security
|
| Topic 2: Prepare and process data | 30-35% | - Ingest and transform data
|
| Topic 3: Set up and configure an Azure Databricks environment | 15-20% | - Create and configure Azure Databricks workspaces
|
| Topic 4: Deploy and maintain data pipelines and workloads | 30-35% | - Manage production workloads
|
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NEW QUESTION # 84
You have an Azure Databricks job named Job1 that contains an ingestion task named Task1 and transformation task named Task2. You need to ensure that if Task1 fails, the task retries automatically, and Task2 is prevented from running How should you configure Job1? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Explanation:
Two task-level settings solve this:
Task1 retry policy: configure Task1 with a maximum number of retries and a retry interval. When Task1 fails, Lakeflow Jobs automatically re-runs it up to the retry limit without any manual intervention. This handles transient infrastructure failures transparently.
Task2 run condition set to 'All succeeded' with Task1 as its dependency: this means Task2 only starts when Task1 has succeeded. If Task1 fails and exhausts all retries, Task2 remains blocked - it never runs on data from a failed upstream ingestion. The dependency is declared in Task2's 'Depends on' setting in the job configuration.
These two settings are independent and composable. Task1's retry policy gives it multiple chances to recover.
Task2's dependency and run condition ensure the downstream transformation only runs on clean, successfully ingested data.
Reference: https://learn.microsoft.com/en-us/azure/databricks/jobs/configure-jobs#task-retries
NEW QUESTION # 85
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.filter(df.order_amount.isNotNull())
Does this meet the goal?
Answer: B
Explanation:
Correct:
* You run the following expression.
df.dropna(subset=["order_amount"])
The expression df.dropna(subset=["order_amount"]) is an appropriate and effective way to exclude rows where order_amount is null.
* You run the following expression.
df.filter(df.order_amount.isNotNull())
To exclude rows where the order amount is null, you can use the isNotNull() method or a SQL expression within the filter() or where() functions.Here are the standard, appropriate expressions:
Option 1: Python/PySpark API (Recommended)
pythondf_clean = df.filter(df["order_amount"].isNotNull())
Incorrect:
* You run the following expression.
df.fillna(0, subset=['order_amount'])
* You run the following expression.
df.filter(df.order_amount != None)
Reference:
https://www.geeksforgeeks.org/python/filter-pyspark-dataframe-columns-with-none-or-null-values/
https://learn.microsoft.com/en-us/azure/databricks/pyspark/reference/classes/dataframe/dropna
NEW QUESTION # 86
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?
Answer: A
Explanation:
The File arrival trigger is exactly what you need for this use case. It natively solves your problem by launching a job the moment new files land in your Azure Storage container, automatically scaling down to zero compute when no data is processing.
Event-Driven: Instead of relying on a time-based schedule (cron) that wastes resources, the Lakeflow Job monitors the specific Azure location and starts exactly when new data appears.
Zero Idle Compute: You can use serverless compute or an ephemeral job cluster that spins up just for the duration of the run and terminates immediately after, meaning zero billing during downtime.
Cloud Cost Efficient: Listing files to detect new arrivals is typically free or fractions of a cent (only incurring minimal cloud provider API costs for listing the storage location).
Reference:
https://learn.microsoft.com/en-us/azure/databricks/jobs/file-arrival-triggers
NEW QUESTION # 87
You have an Azure Databricks workspace that contains a cluster named Cluster1.
Performance monitoring shows that Cluster1 is consistently overprovisioned for its batch workload:
* CPU utilization remains below 20 percent, including during peak processing periods.
* The workload is highly predictable and does not spike.
* The current node type already meets the workload requirements.
You need to reduce compute costs without increasing job duration.
What should you do?
Answer: B
Explanation:
Cluster1 is consistently underutilized, including during peak periods, which indicates that the workload does not require the currently allocated number of worker nodes. Because the workload is predictable and does not experience demand spikes, a smaller fixed-size cluster is more appropriate than maintaining an autoscaling range that can allocate unnecessary workers. Disabling autoscaling and reducing the fixed number of workers rightsizes the cluster and lowers compute costs while retaining the existing node type that already satisfies the workload requirements. Azure Databricks recommends using utilization metrics to determine the appropriate cluster size. Azure Databricks Photon might improve the execution speed of compatible workloads, but it does not directly correct excessive worker allocation. Decreasing the auto-termination timeout only reduces costs after the cluster becomes idle and does not reduce the resources consumed while the batch job is running. Selecting a larger node type would increase capacity and cost even though the existing nodes are already underutilized. Therefore, reducing the worker count is the most direct cost-optimization measure.
NEW QUESTION # 88
A Delta table receives new fields in incoming JSON data. You want to automatically adapt without breaking pipelines. What should you enable?
Answer: A
Explanation:
Auto Loader supports schema inference and schema evolution, allowing new columns to be added automatically during ingestion. This reduces pipeline maintenance and avoids failures due to schema drift. Disabling enforcement is unsafe and risks data corruption. Overwrite mode deletes existing data. Manual updates are not scalable.
NEW QUESTION # 89
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