Free Databricks Databricks-Certified-Associate-Developer-for-Apache-Spark-3.0 Exam Questions
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Databricks Databricks-Certified-Associate-Developer-for-Apache-Spark-3.0 Exam Questions
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Provided By: Databricks
- Exam: Databricks Certified Associate Developer for Apache Spark 3.0
- Certification: Apache Spark Associate Developer
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Total Questions: 420
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Updated On: Sep 26, 2024
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Rated: 4.9 |
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Online Users: 840
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Question 1
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Which of the following is true for driver ?
Answer: C
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Which of the following is true for driver ?
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Question 2
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Given an instance of SparkSession named spark, reviewing the following code what's the output ?1. from pyspark.sql.types import IntegerType2. from pyspark.sql.functions import col3. import pyspark.sql.functions as f4.5.6. a = [1002, 3001, 4002, 2003, 2002, 3004, 1003, 4006]7. b = spark8. .createDataFrame(a, IntegerType())9. .withColumn("x", col("value") 00)10.11. c = b12. .groupBy(col("x"))13. .agg(f.count("x"), f.sum("value"))14. .drop("x")15. .toDF("count", "total")16. .orderBy(col("count").desc(), col("total"))17. .limit(1)18. .show()
Answer: B
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Question 3
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Which of the following code blocks immediately removes the previously cached DataFrame transactionsDf
from memory and disk?
Answer: B
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Which of the following code blocks immediately removes the previously cached DataFrame transactionsDf
from memory and disk?
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Question 4
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Choose the correct code block to unpersist a table named ‘table’.
Answer: C
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Choose the correct code block to unpersist a table named ‘table’.
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Question 5
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Given the following statements regarding caching:1. 1: The default storage level for a DataFrame is StorageLevel.MEMORY2.3. 2: The DataFrame class does have an unpersist() operation4.5. 3: The persist() method needs an action to load data from its source to materialize the DataFrame in cacheWhich one is NOT TRUE ?
Answer: D
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