Databricks Databricks Certified Data Engineer Professional - Certified-Data-Engineer-Professional Valid Dumps

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Databricks Certified-Data-Engineer-Professional Exam Syllabus Topics:

SectionObjectives
Topic 1: Ensuring Data Security and Compliance- Ensuring Compliance
  • 1. Develop data purging solutions that comply with data retention policies
    • 2. Implement compliant batch and streaming pipelines that detect and mask PII
      - Applying Data Security Mechanisms
      • 1. Apply anonymization and pseudonymization methods including hashing, tokenization, suppression, and generalization
        • 2. Use ACLs to secure workspace objects and enforce the principle of least privilege
          • 3. Use row filters and column masks to protect sensitive table data
            Topic 2: Data Modeling- Design and optimize data models
            • 1. Identify the benefits of liquid clustering over partitioning and Z-Ordering
              • 2. Simplify data layout decisions and optimize query performance using liquid clustering
                • 3. Design dimensional models for analytical workloads with efficient querying and aggregation
                  • 4. Design and implement scalable data models using Delta Lake to manage large datasets
                    Topic 3: Data Sharing and Federation- Share and federate data
                    • 1. Configure Lakehouse Federation with appropriate governance across supported source systems
                      • 2. Use Delta Sharing to share live data from the Lakehouse with any computing platform
                        • 3. Demonstrate secure Delta Sharing between Databricks deployments using Databricks-to-Databricks sharing or with external platforms using the open sharing protocol
                          Topic 4: Monitoring and Alerting- Alerting
                          • 1. Use SQL Alerts to monitor data quality
                            • 2. Use the Workflows UI and Jobs API to configure notifications for job status and performance issues
                              - Monitoring
                              • 1. Use system tables for observability of resource utilization, cost, auditing, and workloads
                                • 2. Use Databricks REST APIs and Databricks CLI to monitor jobs and pipelines
                                  • 3. Use Query Profile and Spark UI to monitor workloads
                                    • 4. Use Lakeflow Declarative Pipelines event logs to monitor pipelines
                                      Topic 5: Data Governance- Govern enterprise data
                                      • 1. Demonstrate understanding of the Unity Catalog permission inheritance model
                                        • 2. Create and add descriptions and metadata to enterprise data to improve discoverability
                                          Topic 6: Cost & Performance Optimization- Optimize cost and performance
                                          • 1. Use query profiling to identify bottlenecks such as inefficient joins and data shuffling
                                            • 2. Understand Databricks query optimization techniques for large datasets, including data skipping and file pruning
                                              • 3. Apply Change Data Feed to address streaming table limitations and improve latency
                                                • 4. Understand Delta optimization techniques such as deletion vectors and liquid clustering
                                                  • 5. Understand how and why Unity Catalog managed tables reduce operational overhead and maintenance burden
                                                    Topic 7: Debugging and Deploying- Deploying CI/CD
                                                    • 1. Build and deploy Databricks resources using Databricks Asset Bundles
                                                      • 2. Configure and integrate Git-based CI/CD workflows using Databricks Git folders for notebook and code deployment
                                                        - Debugging and Troubleshooting
                                                        • 1. Use Lakeflow Declarative Pipelines event logs and Spark UI to debug Lakeflow Declarative Pipelines and Spark pipelines
                                                          • 2. Analyze errors and remediate failed job runs using job repairs and parameter overrides
                                                            • 3. Identify diagnostic information using Spark UI, cluster logs, system tables, and query profiles to troubleshoot errors
                                                              Topic 8: Developing Code for Data Processing using Python and SQL- Building and Testing an ETL Pipeline with Lakeflow Declarative Pipelines, SQL, and Apache Spark
                                                              • 1. Choose appropriate configurations for environments, dependencies, high-memory notebook tasks, and retry behavior
                                                                • 2. Use APPLY CHANGES APIs to simplify CDC in Lakeflow Declarative Pipelines
                                                                  • 3. Compare Spark Structured Streaming and Lakeflow Declarative Pipelines to determine the optimal approach for scalable ETL pipelines
                                                                    • 4. Create and automate ETL workloads using Jobs through the UI, APIs, or CLI
                                                                      • 5. Explain the advantages and disadvantages of streaming tables compared to materialized views
                                                                        • 6. Create pipeline components using control flow operators such as if/else and foreach
                                                                          • 7. Build and manage reliable, production-ready batch and streaming data pipelines using Lakeflow Declarative Pipelines and Auto Loader
                                                                            • 8. Develop unit and integration tests using assertDataFrameEqual, assertSchemaEqual, DataFrame.transform, testing frameworks, and debugging tools
                                                                              - Using Python and Tools for Development
                                                                              • 1. Develop User-Defined Functions using Pandas/Python UDF
                                                                                • 2. Manage and troubleshoot external third-party library installations and dependencies, including PyPI packages, local wheels, and source archives
                                                                                  • 3. Design and implement a scalable Python project structure optimized for Databricks Asset Bundles, enabling modular development, deployment automation, and CI/CD integration
                                                                                    Topic 9: Data Ingestion & Acquisition- Design and implement data ingestion pipelines
                                                                                    • 1. Ingest formats including Delta Lake, Parquet, ORC, AVRO, JSON, CSV, XML, text, and binary data from sources such as message buses and cloud storage
                                                                                      • 2. Create an append-only data pipeline capable of handling both batch and streaming data using Delta
                                                                                        Topic 10: Data Transformation, Cleansing, and Quality- Transform and validate data
                                                                                        • 1. Write efficient Spark SQL and PySpark code for advanced transformations including window functions, joins, and aggregations
                                                                                          • 2. Develop a quarantining process for bad data with Lakeflow Declarative Pipelines or Auto Loader in classic jobs

                                                                                            Databricks Certified Data Engineer Professional Sample Questions:

                                                                                            1. The DevOps team has configured a production workload as a collection of notebooks scheduled to run daily using the Jobs UI. A new data engineering hire is onboarding to the team and has requested access to one of these notebooks to review the production logic.
                                                                                            What are the maximum notebook permissions that can be granted to the user without allowing accidental changes to production code or data?

                                                                                            A) Can Run
                                                                                            B) No permissions
                                                                                            C) Can Edit
                                                                                            D) Can Manage
                                                                                            E) Can Read


                                                                                            2. A data engineering team needs to implement a tagging system for their tables as part of an automated ETL process, and needs to apply tags programmatically to tables in Unity Catalog.
                                                                                            Which SQL command adds tags to a table programmatically?

                                                                                            A) ALTER TABLE table_name SET TAGS ('key1' = 'value1', 'key2' = 'value2');
                                                                                            B) SET TAGS FOR table_name AS ('key1' = 'value1', 'key2' = 'value2');
                                                                                            C) COMMENT ON TABLE table_name TAGS ('key1' = 'value1', 'key2' = 'value2');
                                                                                            D) APPLY TAGS ON table_name VALUES ('key1' = 'value1', 'key2' = 'value2');


                                                                                            3. The Databricks workspace administrator has configured interactive clusters for each of the data engineering groups. To control costs, clusters are set to terminate after 30 minutes of inactivity.
                                                                                            Each user should be able to execute workloads against their assigned clusters at any time of the day.
                                                                                            Assuming users have been added to a workspace but not granted any permissions, which of the following describes the minimal permissions a user would need to start and attach to an already configured cluster.

                                                                                            A) Cluster creation allowed. "Can Restart" privileges on the required cluster
                                                                                            B) Workspace Admin privileges, cluster creation allowed. "Can Attach To" privileges on the required cluster
                                                                                            C) "Can Manage" privileges on the required cluster
                                                                                            D) Cluster creation allowed. "Can Attach To" privileges on the required cluster
                                                                                            E) "Can Restart" privileges on the required cluster


                                                                                            4. All records from an Apache Kafka producer are being ingested into a single Delta Lake table with the following schema:
                                                                                            key BINARY, value BINARY, topic STRING, partition LONG, offset LONG, timestamp LONG There are 5 unique topics being ingested. Only the "registration" topic contains Personal Identifiable Information (PII). The company wishes to restrict access to PII. The company also wishes to only retain records containing PII in this table for 14 days after initial ingestion.
                                                                                            However, for non-PII information, it would like to retain these records indefinitely.
                                                                                            Which of the following solutions meets the requirements?

                                                                                            A) Because the value field is stored as binary data, this information is not considered PII and no special precautions should be taken.
                                                                                            B) All data should be deleted biweekly; Delta Lake's time travel functionality should be leveraged to maintain a history of non-PII information.
                                                                                            C) Data should be partitioned by the registration field, allowing ACLs and delete statements to be set for the PII directory.
                                                                                            D) Data should be partitioned by the topic field, allowing ACLs and delete statements to leverage partition boundaries.
                                                                                            E) Separate object storage containers should be specified based on the partition field, allowing isolation at the storage level.


                                                                                            5. A data architect has designed a system in which two Structured Streaming jobs will concurrently write to a single bronze Delta table. Each job is subscribing to a different topic from an Apache Kafka source, but they will write data with the same schema. To keep the directory structure simple, a data engineer has decided to nest a checkpoint directory to be shared by both streams.
                                                                                            The proposed directory structure is displayed below:

                                                                                            Which statement describes whether this checkpoint directory structure is valid for the given scenario and why?

                                                                                            A) No; Delta Lake manages streaming checkpoints in the transaction log.
                                                                                            B) Yes; both of the streams can share a single checkpoint directory.
                                                                                            C) No; only one stream can write to a Delta Lake table.
                                                                                            D) Yes; Delta Lake supports infinite concurrent writers.
                                                                                            E) No; each of the streams needs to have its own checkpoint directory.


                                                                                            Solutions:

                                                                                            Question # 1
                                                                                            Answer: E
                                                                                            Question # 2
                                                                                            Answer: A
                                                                                            Question # 3
                                                                                            Answer: E
                                                                                            Question # 4
                                                                                            Answer: D
                                                                                            Question # 5
                                                                                            Answer: E

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