Databricks Certified Data Engineer Associate - Databricks-Certified-Data-Engineer-Associate Free Exam Questions

QUESTION NO: 1
A data engineer has inherited a Databricks pipeline from a previous team. The pipeline is missing SLAs and costs more than the allotted budget. On analysis, it is noted that the cluster is not being fully utilized, and the dataset is getting skewed. How should the data engineer resolve this issue?

Correct Answer: A Vote an answer
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QUESTION NO: 2
A Databricks single-task workflow fails at the last task due to an error in a notebook. The data engineer fixes the mistake in the notebook. What should the data engineer do to rerun the workflow?

Correct Answer: D Vote an answer
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QUESTION NO: 3
Which of the following commands will return the number of null values in the member_id column?

Correct Answer: D Vote an answer
QUESTION NO: 4
A Databricks workflow fails at the last stage due to an error in a notebook. This workflow runs daily. The data engineer fixes the mistake and wants to rerun the pipeline. This workflow is very costly and time-intensive to run. Which action should the data engineer do in order to minimise downtime and cost?

Correct Answer: B Vote an answer
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QUESTION NO: 5
What Databricks feature can be used to check the data sources and tables used in a workspace?

Correct Answer: B Vote an answer
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QUESTION NO: 6
A data engineer needs to append new records to an existing Delta table while preserving existing data. The ingestion pipeline runs every hour and adds incremental data without replacing previous records. Which write mode should be used?

Correct Answer: B Vote an answer
QUESTION NO: 7
A data engineer is maintaining an ETL pipeline code with a GitHub repository linked to their Databricks account. The data engineer wants to deploy the ETL pipeline to production as a databricks workflow. Which approach should the data engineer use?

Correct Answer: B Vote an answer
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QUESTION NO: 8
A dataset has been defined using Delta Live Tables and includes an expectations clause:
CONSTRAINT valid_timestamp EXPECT (timestamp > '2020-01-01') ON
VIOLATION DROP ROW
What is the expected behavior when a batch of data containing data that violates these constraints is processed?

Correct Answer: B Vote an answer
QUESTION NO: 9
A data engineer is maintaining a data pipeline. Upon data ingestion, the data engineer notices that the source data is starting to have a lower level of quality. The data engineer would like to automate the process of monitoring the quality level.
Which of the following tools can the data engineer use to solve this problem?

Correct Answer: C Vote an answer
QUESTION NO: 10
A data engineer wants to store intermediate data in a temporary view for use within the same Spark session. The data should not persist after the session ends. Which Spark SQL command should be used?

Correct Answer: B Vote an answer
QUESTION NO: 11
A data engineer wants to inspect the schema of a Spark DataFrame during development to understand column names and data types. Which DataFrame method prints the schema in a tree format?

Correct Answer: A Vote an answer
QUESTION NO: 12
A new data engineering team has been assigned to work on a project. The team will need access to database customers in order to see what tables already exist. The team has its own group team.
Which of the following commands can be used to grant the necessary permission on the entire database to the new team?

Correct Answer: B Vote an answer

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