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Databricks Certified Data Engineer Associate Practice Exam is a comprehensive and rigorous assessment designed to evaluate the knowledge and skills of individuals seeking certification as a data engineer. This exam covers a wide range of topics related to data engineering, including data ingestion, transformation, storage, and analysis using Databricks Unified Analytics Platform.This exam consists of multiple-choice questions that test the candidate's understanding of key concepts and best practices in data engineering. These questions are designed to assess the candidate's ability to apply their knowledge to real-world scenarios and solve complex problems using Databricks tools and technologies.Candidates who successfully pass the Databricks Certified Data Engineer Associate Practice Exam demonstrate their proficiency in data engineering and their ability to design, build, and maintain data pipelines that enable organizations to extract valuable insights from their data. This certification is a valuable credential that can help individuals advance their careers in the field of data engineering and stand out in a competitive job market.To prepare for the exam, candidates are encouraged to review the official exam guide provided by Databricks, which outlines the topics covered in the exam and provides sample questions to help candidates familiarize themselves with the format and content of the exam. In addition, candidates may also benefit from taking practice exams and participating in study groups to reinforce their understanding of key concepts and identify areas where they may need to focus their study efforts.Databricks Certified Data Engineer Associate Exam Summary:Exam Name: Databricks Certified Data Engineer AssociateType: Proctored certificationTotal number of questions: 45Time limit: 90 minutesRegistration fee: $200Question types: Multiple choiceTest aides: None allowedLanguages: English, 日本語, Português BRDelivery method: Online proctoredPrerequisites: None, but related training highly recommendedRecommended experience: 6+ months of hands-on experience performing the data engineering tasks outlined in the exam guideValidity period: 2 yearsDatabricks Certified Data Engineer Associate Exam Syllabus Topics:Section 1: Databricks Lakehouse PlatformDescribe the relationship between the data lakehouse and the data warehouse.Identify the improvement in data quality in the data lakehouse over the data lake.Compare and contrast silver and gold tables, which workloads will use a bronze table as a source, which workloads will use a gold table as a source.Identify elements of the Databricks Platform Architecture, such as what is located in the data plane versus the control plane and what resides in the customer's cloud accountDifferentiate between all-purpose clusters and jobs clusters.Identify how cluster software is versioned using the Databricks Runtime.Identify how clusters can be filtered to view those that are accessible by the user.Describe how clusters are terminated and the impact of terminating a cluster.Identify a scenario in which restarting the cluster will be useful.Describe how to use multiple languages within the same notebook.Identify how to run one notebook from within another notebook.Identify how notebooks can be shared with others.Describe how Databricks Repos enables CI/CD workflows in Databricks.Identify Git operations available via Databricks Repos.Identify limitations in Databricks Notebooks version control functionality relative to Repos.Section 2: ELT with Apache SparkExtract data from a single file and from a directory of filesIdentify the prefix included after the FROM keyword as the data type.Create a view, a temporary view, and a CTE as a reference to a fileIdentify that tables from external sources are not Delta Lake tables.Create a table from a JDBC connection and from an external CSV fileIdentify how the count_if function and the count where x is null can be usedIdentify how the count(row) skips NULL values.Deduplicate rows from an existing Delta Lake table.Create a new table from an existing table while removing duplicate rows.Deduplicate a row based on specific columns.Validate that the primary key is unique across all rows.Validate that a field is associated with just one unique value in another field.Validate that a value is not present in a specific field.Cast a column to a timestamp.Extract calendar data from a timestamp.Extract a specific pattern from an existing string column.Utilize the dot syntax to extract nested data fields.Identify the benefits of using array functions.Parse JSON strings into structs.Identify which result will be returned based on a join query.Identify a scenario to use the explode function versus the flatten functionIdentify the PIVOT clause as a way to convert data from wide format to a long format.Define a SQL UDF.Identify the location of a function.Describe the security model for sharing SQL UDFs.Use CASE/WHEN in SQL code.Leverage CASE/WHEN for custom control flow.Section 3: Incremental Data ProcessingIdentify where Delta Lake provides ACID transactionsIdentify the benefits of ACID transactions.Identify whether a transaction is ACID-compliant.Compare and contrast data and metadata.Compare and contrast managed and external tables.Identify a scenario to use an external table.Create a managed table.Identify the location of a table.Inspect the directory structure of Delta Lake files.Identify who has written previous versions of a table.Review a history of table transactions.Roll back a table to a previous version.Identify that a table can be rolled back to a previous version.Query a specific version of a table.Identify why Zordering is beneficial to Delta Lake tables.Identify how vacuum commits deletes.Identify the kind of files Optimize compacts.Identify CTAS as a solution.Create a generated column.Add a table comment.Use CREATE OR REPLACE TABLE and INSERT OVERWRITECompare and contrast CREATE OR REPLACE TABLE and INSERT OVERWRITEIdentify a scenario in which MERGE should be used.Identify MERGE as a command to deduplicate data upon writing.Describe the benefits of the MERGE command.Identify why a COPY INTO statement is not duplicating data in the target table.Identify a scenario in which COPY INTO should be used.Use COPY INTO to insert data.Identify the components necessary to create a new DLT pipeline.Identify the purpose of the target and of the notebook libraries in creating a pipeline.Compare and contrast triggered and continuous pipelines in terms of cost and latencyIdentify which source location is utilizing Auto Loader.Identify a scenario in which Auto Loader is beneficial.Identify why Auto Loader has inferred all data to be STRING from a JSON sourceIdentify the default behavior of a constraint violationIdentify the impact of ON VIOLATION DROP ROW and ON VIOLATION FAIL UPDATEfor a constraint violationExplain change data capture and the behavior of APPLY CHANGES INTOQuery the events log to get metrics, perform audit loggin, examine lineage.Troubleshoot DLT syntax: Identify which notebook in a DLT pipeline produced an error, identify the need for LIVE in create statement, identify the need for STREAM in from clause.Section 4: Production PipelinesIdentify the benefits of using multiple tasks in Jobs.Set up a predecessor task in Jobs.Identify a scenario in which a predecessor task should be set up.Review a task's execution history.Identify CRON as a scheduling opportunity.Debug a failed task.Set up a retry policy in case of failure.Create an alert in the case of a failed task.Identify that an alert can be sent via email.Section 5: Data GovernanceIdentify one of the four areas of data governance.Compare and contrast metastores and catalogs.Identify Unity Catalog securables.Define a service principal.Identify the cluster security modes compatible with Unity Catalog.Create a UC-enabled all-purpose cluster.Create a DBSQL warehouse.Identify how to query a three-layer namespace.Implement data object access controlIdentify colocating metastores with a workspace as best practice.Identify using service principals for connections as best practice.Identify the segregation of business units across catalog as best practice.Overall, the Databricks Certified Data Engineer Associate Practice Exam is a challenging yet rewarding assessment that can help individuals validate their expertise in data engineering and demonstrate their commitment to professional development in this rapidly evolving field. By earning this certification, candidates can enhance their credibility as data engineers and increase their opportunities for career advancement and professional growth.DISCLAIMER: These questions are designed to, give you a feel of the level of questions asked in the actual exam. We are not affiliated with Databricks or Apache. All the screenshots added to the answer explanation are not owned by us. Those are added just for reference to the context.

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