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Databricks - Data Engineer Associate Practice Exam 5 questions with correct answers
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Databricks - Data Engineer Associate Practice Exam 5 questions with correct answers
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Databricks - Data Engineer AssociatePractice Exam 5 questions with correct
answers
How does Lakehouse replace the dependency on using Data lakes and Data warehouses in a
x x x x x x x x x x x x x x
Data and Analytics solution?
x x x x
a. Open, direct access to data stored in standard data formats.
x x x x x x x x x x
b. Supports ACID transactions.
x x x
c. Supports BI and Machine learning workloads
x x x x x x
d. Support for end-to-end streaming and batch workloads
x x x x x x x
e. All the above - ANSWER: ➡ e. All the above
x x x x x xx x x x x
xplanation
Lakehouse combines the benefits of a data warehouse and data lakes,
x x x x x x x x x x
Lakehouse = Data Lake + DataWarehouse x x x x x
Here are some of the major benefits of a lakehouse
x x x x x x x x x
You are currently working on storing data you received from different customer surveys, this
x x x x x x x x x x x x x
data is highly unstructured and changes over time, why Lakehouse is a better choice compared
x x x x x x x x x x x x x x x
to a Data warehouse?
x x x x
a. Lakehouse supports schema enforcement and evolution, traditional data warehouses lack
x x x x x x x x x x
schema evolution.
x x
b. Lakehouse supports SQL
x x x
,c. Lakehouse supports ACID
x x x
d. Lakehouse enforces data integrity
x x x x
e. Lakehouse supports primary and foreign keys like a data warehouse - ANSWER: ➡ a.
x x x x x x x x x x x x xx x
Lakehouse supports schema enforcement and evolution, traditional data warehouses lack
x x x x x x x x x x
schema evolution.
x x
Which of the following locations hosts the driver and worker nodes of a Databricks-managed
x x x x x x x x x x x x x
cluster?
x
a. Data plane
x x
b. Control plane
x x
c. Databricks Filesystem
x x
d. JDBC data source
x x x
e. Databricks web application - ANSWER: ➡ a. Data plane
x x x x x xx x x x
xplanation
The answer is Data Plane, which is where compute(all-purpose, Job Cluster, DLT) are stored
x x x x x x x x x x x x x
this is generally a customer cloud account, there is one exception SQL Warehouses, currently
x x x x x x x x x x x x x x
there are 3 types of SQL Warehouse compute available(classic, pro, serverless), in classic and
x x x x x x x x x x x x x x
pro compute is located in customer cloud account but serverless computed is located in
x x x x x x x x x x x x x x
Databricks cloud account.
x x x
You have written a notebook to generate a summary data set for reporting, Notebook was
x x x x x x x x x x x x x x
scheduled using the job cluster, but you realized it takes an average of 8 minutes to start the
x x x x x x x x x x x x x x x x x x
cluster, what feature can be used to start the cluster in a timely fashion?
x x x x x x x x x x x x x x
a. Setup an additional job to run ahead of the actual job so the cluster is running second job
x x x x x x x x x x x x x x x x x x
starts
x
,b. Use the Databricks cluster pools feature to reduce the startup time
x x x x x x x x x x x
c. Use Databricks Premium edition instead of Databricks standard edition
x x x x x x x x x
d. Pin the cluster in the cluster UI page so it is always available to the jobs
x x x x x x x x x x x x x x x x
e. Disable auto termination so the cluster is always running - ANSWER: ➡ b. Use the Databricks
x x x x x x x x x x x xx x x x x
cluster pools feature to reduce the startup time
x x x x x x x x
xplanation
Cluster pools allow us to reserve VM's ahead of time, when a new job cluster is created VM are
x x x x x x x x x x x x x x x x x x
grabbed from the pool. Note: when the VM's are waiting to be used by the cluster only cost
x x x x x x x x x x x x x x x x x x
incurred is Azure. Databricks run time cost is only billed once VM is allocated to a cluster.
x x x x x x x x x x x x x x x x x
Here is a demo of how to setup and follow some best practices,
x x x x x x x x x x x x
https://www.youtube.com/watch?v=FVtITxOabxg&ab_channel=DatabricksAcademy
Which of the following statement is true about Databricks repos?
x x x x x x x x x
a. You can approve the pull request if you are the owner of Databricks repos
x x x x x x x x x x x x x x
b. A workspace can only have one instance of git integration
x x x x x x x x x x
c. Databricks Repos and Notebook versioning are the same features
x x x x x x x x x
d. You cannot create a new branch in Databricks repos
x x x x x x x x x
, e. Databricks repos allow you to comment and commit code changes and push them to a remote
x x x x x x x x x x x x x x x x
branch - ANSWER: ➡ e. Databricks repos allow you to comment and commit code changes and
x x x xx x x x x x x x x x x x x
push them to a remote branch
x x x x x x
xplanation
See below diagram to understand the role Databricks Repos and Git provider plays when
x x x x x x x x x x x x x
building a CI/CD workdlow.
x x x x
All the steps highlighted in yellow can be done Databricks Repo, all the steps highlighted in
x x x x x x x x x x x x x x x
Gray are done in a git provider like Github or Azure Devops
x x x x x x x x x x x x
Which of the statement is correct about the cluster pools?
x x x x x x x x x
a. Cluster pools allow you to perform load balancing
x x x x x x x x
b. Cluster pools allow you to create a cluster
x x x x x x x x
c. Cluster pools allow you to save time when starting a new cluster
x x x x x x x x x x x x
d. Cluster pools are used to share resources among multiple teams
x x x x x x x x x x
e. Cluster pools allow you to have all the nodes in the cluster from single physical server rack -
x x x x x x x x x x x x x x x x x x
ANSWER: ➡ c. Cluster pools allow you to save time when starting a new cluster
x xx x x x x x x x x x x x x x
Once a cluster is deleted, which of the below additional actions need to performed by the
x x x x x x x x x x x x x x x
administrator?
x
a. Remove virtual machines but storage and networking are automatically dropped
x x x x x x x x x x
b. Drop storage disks but Virtual machines and networking are automatically dropped
x x x x x x x x x x x
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