Online Databricks Certified Data Engineer Professional Study Materials

Online Databricks Certified Data Engineer Professional Study Materials

Do you want to pass the Databricks Certified Data Engineer Professional exam with flying colors? The best tips to pass Databricks Certified Data Engineer Professional exam is to use Databricks Certified Data Engineer Professional Study Materials. FreeTestShare Databricks Certified Data Engineer Professional Study Materials allow you to practice the types of questions that may occur on the exam and to think about the answers ahead of time. Databricks Certified Data Engineer Professional Study Materials are exactly the right study tools that contain real exam questions and answers to help you pass the exam on the first try!

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1. Which of the following locations hosts the driver and worker nodes of a Databricks-managed clus-ter?

2. Which of the following describes a scenario in which a data engineer will want to use a Job cluster instead of an all-purpose cluster?

3. WITH COLUMNS ( id STRING, birthDate DATE, avgRating FLOAT ) USING DELTA

E. 1. CREATE OR REPLACE TABLE table_name ( id STRING, birthDate DATE, avgRating FLOAT )

4. A data engineering team needs to query a Delta table to extract rows that all meet the same condition.

However, the team has noticed that the query is running slowly. The team has already tuned the size of the data files. Upon investigating, the team has concluded that the rows meeting the condition are sparsely located throughout each of the data files.

Based on the scenario, which of the following optimization techniques could speed up the query?

5. GROUP BY district;

The data analyst would like the data engineering team to run this query every day. The date at the end of the table name (20220101) should automatically be replaced with the current date each time the query is run.

Which of the following approaches could be used by the data engineering team to efficiently auto-mate this process?

6. Which method is used to solve for coefficients b0, b1, ... bn in your linear regression model:

Y = b0+b1x1+b2x2+ .... +bnxn

7. FROM json.`/path/to/json/file.json`;

The data engineer asks a colleague for help to convert this query for use in a Delta Live Tables (DLT) pipeline. The query should create the first table in the DLT pipeline.

Which of the following describes the change the colleague needs to make to the query?

8. A denote the event 'student is female' and let B denote the event 'student is French'. In a class of 100 students suppose 60 are French, and suppose that 10 of the French students are females. Find the probability that if I pick a French student, it will be a girl, that is, find P(A|B).

9. Suppose there are three events then which formula must always be equal to P(E1|E2,E3)?

10. Which of the following describes a benefit of a data lakehouse that is unavailable in a traditional data

warehouse?


 

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