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Databricks Certified Data Engineer Professional Sample Questions:
1. A junior data engineer has configured a workload that posts the following JSON to the Databricks REST API endpoint 2.0/jobs/create.
Assuming that all configurations and referenced resources are available, which statement describes the result of executing this workload three times?
A) Three new jobs named "Ingest new data" will be defined in the workspace, but no jobs will be executed.
B) The logic defined in the referenced notebook will be executed three times on new clusters with the configurations of the provided cluster ID.
C) Three new jobs named "Ingest new data" will be defined in the workspace, and they will each run once daily.
D) One new job named "Ingest new data" will be defined in the workspace, but it will not be executed.
E) The logic defined in the referenced notebook will be executed three times on the referenced existing all purpose cluster.
2. Which of the following technologies can be used to identify key areas of text when parsing Spark Driver log4j output?
A) pyspsark.ml.feature
B) Julia
C) Scala Datasets
D) C++
E) Regex
3. The data engineering team maintains the following code:
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Assuming that this code produces logically correct results and the data in the source table has been de-duplicated and validated, which statement describes what will occur when this code is executed?
A) An incremental job will detect if new rows have been written to the silver_customer_sales table; if new rows are detected, all aggregates will be recalculated and used to overwrite the gold_customer_lifetime_sales_summary table.
B) The silver_customer_sales table will be overwritten by aggregated values calculated from all records in the gold_customer_lifetime_sales_summary table as a batch job.
C) A batch job will update the gold_customer_lifetime_sales_summary table, replacing only those rows that have different values than the current version of the table, using customer_id as the primary key.
D) The gold_customer_lifetime_sales_summary table will be overwritten by aggregated values calculated from all records in the silver_customer_sales table as a batch job.
E) An incremental job will leverage running information in the state store to update aggregate values in the gold_customer_lifetime_sales_summary table.
4. The data architect has mandated that all tables in the Lakehouse should be configured as external (also known as "unmanaged") Delta Lake tables.
Which approach will ensure that this requirement is met?
A) When configuring an external data warehouse for all table storage, leverage Databricks for all ELT.
B) When tables are created, make sure that the EXTERNAL keyword is used in the CREATE TABLE statement.
C) When a database is being created, make sure that the LOCATION keyword is used.
D) When the workspace is being configured, make sure that external cloud object storage has been mounted.
E) When data is saved to a table, make sure that a full file path is specified alongside the Delta format.
5. Which statement describes a key benefit of an end-to-end test?
A) It closely simulates real world usage of your application.
B) It makes it easier to automate your test suite
C) It pinpoint errors in the building blocks of your application.
D) It provides testing coverage for all code paths and branches.
Solutions:
Question # 1 Answer: A | Question # 2 Answer: E | Question # 3 Answer: D | Question # 4 Answer: B | Question # 5 Answer: A |