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| Section | Weight | Objectives |
|---|---|---|
| Deploy and maintain data pipelines and workloads | 30-35% | - Manage production workloads
|
| Prepare and process data | 30-35% | - Ingest and transform data
|
| Secure and govern Unity Catalog objects | 15-20% | - Implement governance and security
|
| Set up and configure an Azure Databricks environment | 15-20% | - Create and configure Azure Databricks workspaces
|
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NEW QUESTION # 24
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 != None)
Does this meet the goal?
Answer: A
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 # 25
You have an Azure Databricks workspace that contains a job in Lakeflow Jobs named Job1. Job1 contains multiple tasks. Some tasks are business-critical, and others are not.
You need to configure alerting so that:
* Failures in non-critical tasks do not send notifications.
* Notifications are sent only for failures in the critical parts of the workflow.
What should trigger a notification?
Answer: B
Explanation:
The notification should be triggered by a task failure and configured only on the business-critical tasks.
Lakeflow Jobs supports notifications at both the overall job level and the individual task level. By attaching failure notifications specifically to the critical tasks, a notification is sent when one of those tasks fails, while failures in non-critical tasks do not generate unnecessary alerts. Microsoft Learn A job-level failure notification is too broad because it evaluates the result of the entire workflow. If a non- critical task causes Job1 to enter a failed state, the job-level notification could be sent even though the failed task was not considered business-critical. Job-success and task-success notifications report successful execution and do not satisfy the failure-alerting requirement.
Task-level failure notifications provide the required granularity and allow the alert configuration to follow the operational importance of each workflow component. If retries are configured, notifications can also be muted until the final retry to prevent repeated alerts for temporary failures. Therefore, task failure is the correct notification trigger.
NEW QUESTION # 26
You have an Azure Databricks workspace that uses Databricks SQL.
You have a table named sales_goals_source that contains the following columns:
Salesperson
Item
2019
2020
2021
You need to transform the year columns into rows and return the columns Salesperson, Item, Year, and Value.
How should you complete the SQL statement? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
SELECT Salesperson, Item, Year, Value
FROM sales_goals_source
UNPIVOT
(
Value FOR [first dropdown] IN [second dropdown]
);
Answer:
Explanation:
Explanation:
First dropdown: Year
Second dropdown: (2019, 2020, 2021)
The UNPIVOT operator converts the separate 2019, 2020, and 2021 columns into rows. Value becomes the output column containing the values previously stored in those year columns. Year becomes the output name column that identifies the original column from which each value came. Therefore, the expression must use Value FOR Year IN (2019, 2020, 2021). The Salesperson and Item columns are not included in the IN list because they remain identifier columns and are repeated for every resulting year row. A single source row consequently produces three output rows-one for each listed year. Selecting (Year) would reference an output name rather than the source columns that must be rotated.
NEW QUESTION # 27
You have an Azure Databricks workspace that contains a job in Lakeflow Jobs named Job1.
Job! 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: B
Explanation:
The correct answer is C - File Arrival trigger.
File Arrival monitors a specified Azure Storage path and fires a job run each time a new file lands there. This ticks both requirements: Job1 starts automatically in response to new data (no human involvement), and when no files arrive, no job runs - no cluster spins up, no compute cost is incurred.
Option A (scheduled) runs at fixed intervals regardless of whether files are waiting. A quiet weekend still kicks off hourly (or daily) runs, burning compute for nothing. Option B (continuous) keeps the job running perpetually, consuming resources even during long gaps between file arrivals - exactly what 'does NOT consume compute resources when no data is available' rules out. Option D (manual) requires a person to trigger every run, which is unsuitable for unpredictable arrival patterns.
Reference: https://learn.microsoft.com/en-us/azure/databricks/jobs/triggers#file-arrival-trigger
NEW QUESTION # 28
Which operation guarantees ACID compliance in Delta Lake?
Answer: C
Explanation:
Delta Lake ensures ACID compliance through its transaction log (Delta log). It tracks all changes, enabling consistency, isolation, and rollback capabilities. File append operations alone are not transactional. RDD transformations are low-level and not ACID-aware.
NEW QUESTION # 29
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