2026 UPDATED QUESTIONS DOWNLOAD
Dcam Overview Newest 2026 Complete All Questions And Correct Detailed
Answers (Verified Answers) Graded A+
This 100-question master bank is the definitive study tool for the EDM Council’s DCAM 2.2,
covering all 8 core capabilities and maturity scoring levels for enterprise data management.
Each question features a LARGE BOLD answer and a detailed italicized rationale to ensure
you master Data Strategy, AI Ethics, and Quality Management for a guaranteed first-time
accreditation pass.
Question 1
Which component of Apache Spark is responsible for coordinating tasks across the cluster?
A. Executor
B. Worker Node
C. Driver
D. Cluster Manager
Answer:
C. DRIVER
Rationale: The Spark driver program controls execution and coordinates tasks across executors.
Question 2
Which Spark concept allows transformations to be delayed until an action is executed?
A. Eager execution
B. Lazy evaluation
C. Parallel execution
D. Batch processing
Answer:
B. LAZY EVALUATION
Rationale: Spark transformations are not executed immediately; they are evaluated only when an
action occurs.
,2026 UPDATED QUESTIONS DOWNLOAD
Question 3
Which function is considered a Spark action?
A. select()
B. filter()
C. count()
D. groupBy()
Answer:
C. COUNT()
Rationale: count() triggers execution of transformations and returns a result.
Question 4
Which Spark structure is commonly used for structured data processing?
A. RDD
B. DataFrame
C. Dataset only
D. Hive table
Answer:
B. DATAFRAME
Rationale: DataFrames are the primary abstraction for structured data in Spark.
Question 5
Which command displays the first 20 rows of a DataFrame?
A. display()
B. show()
C. head()
D. preview()
Answer:
B. SHOW()
Rationale: show() prints DataFrame rows to the console.
,2026 UPDATED QUESTIONS DOWNLOAD
Question 6
Which file format is optimized for Spark performance?
A. CSV
B. JSON
C. Text
D. Parquet
Answer:
D. PARQUET
Rationale: Parquet is a columnar storage format optimized for Spark analytics.
Question 7
Which function removes rows containing NULL values?
A. removeNull()
B. dropna()
C. clean()
D. deleteNull()
Answer:
B. DROPNA()
Rationale: dropna() removes rows with missing values.
Question 8
Which method adds a new column to a DataFrame?
A. addColumn()
B. insertColumn()
C. withColumn()
D. appendColumn()
Answer:
C. WITHCOLUMN()
, 2026 UPDATED QUESTIONS DOWNLOAD
Rationale: withColumn() creates or replaces a column.
Question 9
Which function sorts a DataFrame by a column?
A. arrange()
B. orderBy()
C. rank()
D. filter()
Answer:
B. ORDERBY()
Rationale: orderBy() sorts rows based on specified columns.
Question 10
Which Spark component performs computations?
A. Driver
B. Executors
C. Scheduler
D. Cluster manager
Answer:
B. EXECUTORS
Rationale: Executors run tasks and store data in memory.
Question 11
Which command filters rows based on a condition?
A. where()
B. filter()
C. select()
D. groupBy()
Dcam Overview Newest 2026 Complete All Questions And Correct Detailed
Answers (Verified Answers) Graded A+
This 100-question master bank is the definitive study tool for the EDM Council’s DCAM 2.2,
covering all 8 core capabilities and maturity scoring levels for enterprise data management.
Each question features a LARGE BOLD answer and a detailed italicized rationale to ensure
you master Data Strategy, AI Ethics, and Quality Management for a guaranteed first-time
accreditation pass.
Question 1
Which component of Apache Spark is responsible for coordinating tasks across the cluster?
A. Executor
B. Worker Node
C. Driver
D. Cluster Manager
Answer:
C. DRIVER
Rationale: The Spark driver program controls execution and coordinates tasks across executors.
Question 2
Which Spark concept allows transformations to be delayed until an action is executed?
A. Eager execution
B. Lazy evaluation
C. Parallel execution
D. Batch processing
Answer:
B. LAZY EVALUATION
Rationale: Spark transformations are not executed immediately; they are evaluated only when an
action occurs.
,2026 UPDATED QUESTIONS DOWNLOAD
Question 3
Which function is considered a Spark action?
A. select()
B. filter()
C. count()
D. groupBy()
Answer:
C. COUNT()
Rationale: count() triggers execution of transformations and returns a result.
Question 4
Which Spark structure is commonly used for structured data processing?
A. RDD
B. DataFrame
C. Dataset only
D. Hive table
Answer:
B. DATAFRAME
Rationale: DataFrames are the primary abstraction for structured data in Spark.
Question 5
Which command displays the first 20 rows of a DataFrame?
A. display()
B. show()
C. head()
D. preview()
Answer:
B. SHOW()
Rationale: show() prints DataFrame rows to the console.
,2026 UPDATED QUESTIONS DOWNLOAD
Question 6
Which file format is optimized for Spark performance?
A. CSV
B. JSON
C. Text
D. Parquet
Answer:
D. PARQUET
Rationale: Parquet is a columnar storage format optimized for Spark analytics.
Question 7
Which function removes rows containing NULL values?
A. removeNull()
B. dropna()
C. clean()
D. deleteNull()
Answer:
B. DROPNA()
Rationale: dropna() removes rows with missing values.
Question 8
Which method adds a new column to a DataFrame?
A. addColumn()
B. insertColumn()
C. withColumn()
D. appendColumn()
Answer:
C. WITHCOLUMN()
, 2026 UPDATED QUESTIONS DOWNLOAD
Rationale: withColumn() creates or replaces a column.
Question 9
Which function sorts a DataFrame by a column?
A. arrange()
B. orderBy()
C. rank()
D. filter()
Answer:
B. ORDERBY()
Rationale: orderBy() sorts rows based on specified columns.
Question 10
Which Spark component performs computations?
A. Driver
B. Executors
C. Scheduler
D. Cluster manager
Answer:
B. EXECUTORS
Rationale: Executors run tasks and store data in memory.
Question 11
Which command filters rows based on a condition?
A. where()
B. filter()
C. select()
D. groupBy()
