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Databricks Certified Data Engineer Professional Sample Questions:

1. A large company seeks to implement a near real-time solution involving hundreds of pipelines with parallel updates of many tables with extremely high volume and high velocity data.
Which of the following solutions would you implement to achieve this requirement?

A) Use Databricks High Concurrency clusters, which leverage optimized cloud storage connections to maximize data throughput.
B) Store all tables in a single database to ensure that the Databricks Catalyst Metastore can load balance overall throughput.
C) Partition ingestion tables by a small time duration to allow for many data files to be written in parallel.
D) Isolate Delta Lake tables in their own storage containers to avoid API limits imposed by cloud vendors.
E) Configure Databricks to save all data to attached SSD volumes instead of object storage, increasing file I/O significantly.

2. Which of the following is true of Delta Lake and the Lakehouse?

A) Z-order can only be applied to numeric values stored in Delta Lake tables
B) Views in the Lakehouse maintain a valid cache of the most recent versions of source tables at all times.
C) Delta Lake automatically collects statistics on the first 32 columns of each table which are leveraged in data skipping based on query filters.
D) Because Parquet compresses data row by row. strings will only be compressed when a character is repeated multiple times.
E) Primary and foreign key constraints can be leveraged to ensure duplicate values are never entered into a dimension table.

3. A distributed team of data analysts share computing resources on an interactive cluster with autoscaling configured. In order to better manage costs and query throughput, the workspace administrator is hoping to evaluate whether cluster upscaling is caused by many concurrent users or resource-intensive queries.
In which location can one review the timeline for cluster resizing events?

A) Driver's log file
B) Workspace audit logs
C) Cluster Event Log
D) Ganglia
E) Executor's log file

4. Which REST API call can be used to review the notebooks configured to run as tasks in a multi- task job?

A) /jobs/get
B) /jobs/runs/get
C) /jobs/list
D) /jobs/runs/list
E) /jobs/runs/get-output

5. 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.

Solutions: