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Data Engineering Associate with Databricks exam questions with verified answers
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Data Engineering Associate with Databricks exam questions with verified answers
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Data Engineering Associate with Databricksexam questions with verified answers
What is done with the control plane? - ANSWER: ➡ web application
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notebooks
jobs
cluster management w
What is done with the data plane? - ANSWER: ➡ spinning up clusters
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data processing
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accessing data sources w w
SQL: Create table with specific columns - ANSWER: ➡ CREATE TABLE students (id INT, name
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STRING)
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SQL: Insert data - ANSWER: ➡ INSERT INTO students
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VALUES (1, "Omar") w w
Does ACID guarantee inserting many records in a single transaction? - ANSWER: ➡ Yes
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SQL: Update record - ANSWER: ➡ UPDATE students
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SET value = value + 1
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WHERE name LIKE "T%" // starts with T
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SQL: Delete record - ANSWER: ➡ DELETE FROM students
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WHERE value > 6 w w w w
, // Boolean is lowercase
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// equals is single =
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What is upsert? - ANSWER: ➡ Allows updates, inserts and other manipulations in a single
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command
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SQL: Merge for CDC - ANSWER: ➡ MERGE INTO students b
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USING updates u w w
ON b.id=u.id
w
WHEN MATCHED AND u.type = "update"
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w THEN UPDATE SET *w w w
w THEN INSERT * w w
WHEN NOT MATCHED AND w w w
w THEN DELETE w
Which metastore does databricks use by default? - ANSWER: ➡ Hive
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SQL: See details about Delta table including number of files - ANSWER: ➡ DESCRIBE DETAIL
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students
w
What does OPTIMIZE do? - ANSWER: ➡ Replace existing data files by combining files and
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rewriting results
w w
SQL: OPTIMIZE - ANSWER: ➡ OPTIMIZE students
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ZORDER BY id w w
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