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Databricks Certified Data Engineer Professional Sample Questions:

1. A junior developer complains that the code in their notebook isn't producing the correct results in the development environment. A shared screenshot reveals that while they're using a notebook versioned with Databricks Repos, they're using a personal branch that contains old logic. The desired branch named dev-2.3.9 is not available from the branch selection dropdown.
Which approach will allow this developer to review the current logic for this notebook?

A) Use Repos to pull changes from the remote Git repository and select the dev-2.3.9 branch.
B) Merge all changes back to the main branch in the remote Git repository and clone the repo again
C) Use Repos to checkout the dev-2.3.9 branch and auto-resolve conflicts with the current branch
D) Use Repos to merge the current branch and the dev-2.3.9 branch, then make a pull request to sync with the remote repository
E) Use Repos to make a pull request use the Databricks REST API to update the current branch to dev-2.3.9

2. A table named user_ltv is being used to create a view that will be used by data analysts on Get Latest & Actual Certified-Data-Engineer-Professional Exam's Question and Answers from various teams. Users in the workspace are configured into groups, which are used for setting up data access using ACLs.
The user_ltv table has the following schema:
email STRING, age INT, ltv INT
The following view definition is executed:

An analyst who is not a member of the marketing group executes the following query:
SELECT * FROM email_ltv
Which statement describes the results returned by this query?

A) The email and ltv columns will be returned with the values in user itv.
B) Only the email and itv columns will be returned; the email column will contain all null values.
C) Only the email and ltv columns will be returned; the email column will contain the string
"REDACTED" in each row.
D) The email, age. and ltv columns will be returned with the values in user ltv.
E) Three columns will be returned, but one column will be named "redacted" and contain only null values.

3. The data architect has decided that once data has been ingested from external sources into the Databricks Lakehouse, table access controls will be leveraged to manage permissions for all production tables and views.
The following logic was executed to grant privileges for interactive queries on a production database to the core engineering group.
GRANT USAGE ON DATABASE prod TO eng;
GRANT SELECT ON DATABASE prod TO eng;
Assuming these are the only privileges that have been granted to the eng group and that these users are not workspace administrators, which statement describes their privileges?

A) Group members are able to create, query, and modify all tables and views in the prod database, but cannot define custom functions.
B) Group members have full permissions on the prod database and can also assign permissions to other users or groups.
C) Group members are able to query all tables and views in the prod database, but cannot create or edit anything in the database.
D) Group members are able to list all tables in the prod database but are not able to see the results of any queries on those tables.
E) Group members are able to query and modify all tables and views in the prod database, but cannot create new tables or views.

4. Which statement characterizes the general programming model used by Spark Structured Streaming?

A) Structured Streaming is implemented as a messaging bus and is derived from Apache Kafka.
B) Structured Streaming leverages the parallel processing of GPUs to achieve highly parallel data throughput.
C) Structured Streaming models new data arriving in a data stream as new rows appended to an unbounded table.
D) Structured Streaming relies on a distributed network of nodes that hold incremental state values for cached stages.
E) Structured Streaming uses specialized hardware and I/O streams to achieve sub-second latency for data transfer.

5. An external object storage container has been mounted to the location /mnt/finance_eda_bucket.
The following logic was executed to create a database for the finance team:

After the database was successfully created and permissions configured, a member of the finance team runs the following code:

If all users on the finance team are members of the finance group, which statement describes how the tx_sales table will be created?

A) An managed table will be created in the storage container mounted to /mnt/finance_eda_bucket.
B) A logical table will persist the query plan to the Hive Metastore in the Databricks control plane.
C) A logical table will persist the physical plan to the Hive Metastore in the Databricks control plane.
D) A managed table will be created in the DBFS root storage container.
E) An external table will be created in the storage container mounted to /mnt/finance eda bucket.

Solutions: