Practice Spark Basics MCQ questions with detailed explanations and clear answer validation. These MCQs help you revise core concepts, compare close options, and improve accuracy for interviews, certification exams, and technical screening rounds. Use this updated 2026 set to strengthen fundamentals and confidence.
Q51. Which statement about a task is most accurate?
Select an answer to check.
Answer: Smallest unit of work on one partition.
Here, Smallest unit of work on one partition. is the right choice. Run by executors. It aligns directly with what the question asks about which statement about a task is most accurate. Competing choices sound plausible, but they miss the key condition.
Q52. How is a task best characterized?
Select an answer to check.
Answer: Smallest unit of work on one partition.
In this case, Smallest unit of work on one partition. is correct. Run by executors. It aligns directly with what the question asks about how is a task best characterized. Competing choices sound plausible, but they miss the key condition.
Q53. Which option best describes a stage?
Select an answer to check.
Answer: Set of tasks with no shuffle between them.
The best option here is Set of tasks with no shuffle between them.. Bounded by shuffles. It aligns directly with what the question asks about which option best describes a stage. Competing choices sound plausible, but they miss the key condition.
Q54. What is the primary purpose of a stage?
Select an answer to check.
Answer: Set of tasks with no shuffle between them.
For this question, Set of tasks with no shuffle between them. is correct. Bounded by shuffles. It aligns directly with what the question asks about what is the primary purpose of a stage. Competing choices sound plausible, but they miss the key condition.
Q55. Which statement about a stage is most accurate?
Select an answer to check.
Answer: Set of tasks with no shuffle between them.
Set of tasks with no shuffle between them. is the correct answer here. Bounded by shuffles. It aligns directly with what the question asks about which statement about a stage is most accurate. Competing choices sound plausible, but they miss the key condition.
Q56. How is a stage best characterized?
Select an answer to check.
Answer: Set of tasks with no shuffle between them.
Here, Set of tasks with no shuffle between them. is the right choice. Bounded by shuffles. This matches the core idea being tested around how is a stage best characterized. Competing choices sound plausible, but they miss the key condition.
Q57. Which option best describes a job?
Select an answer to check.
Answer: Set of stages triggered by an action.
In this case, Set of stages triggered by an action. is correct. Per-action execution unit. This matches the core idea being tested around which option best describes a job. Competing choices sound plausible, but they miss the key condition.
Q58. What is the primary purpose of a job?
Select an answer to check.
Answer: Set of stages triggered by an action.
The best option here is Set of stages triggered by an action.. Per-action execution unit. This matches the core idea being tested around what is the primary purpose of a job. Competing choices sound plausible, but they miss the key condition.
Q59. Which statement about a job is most accurate?
Select an answer to check.
Answer: Set of stages triggered by an action.
For this question, Set of stages triggered by an action. is correct. Per-action execution unit. This matches the core idea being tested around which statement about a job is most accurate. Competing choices sound plausible, but they miss the key condition.
Q60. How is a job best characterized?
Select an answer to check.
Answer: Set of stages triggered by an action.
Set of stages triggered by an action. is the correct answer here. Per-action execution unit. This matches the core idea being tested around how is a job best characterized. Competing choices sound plausible, but they miss the key condition.
Q61. Which option best describes a shuffle?
Select an answer to check.
Answer: Data exchange across nodes by key.
Here, Data exchange across nodes by key. is the right choice. Expensive; minimize. That is exactly the concept behind which option best describes a shuffle in this context. Competing choices sound plausible, but they miss the key condition.
Q62. What is the primary purpose of a shuffle?
Select an answer to check.
Answer: Data exchange across nodes by key.
In this case, Data exchange across nodes by key. is correct. Expensive; minimize. That is exactly the concept behind what is the primary purpose of a shuffle in this context. Competing choices sound plausible, but they miss the key condition.
Q63. Which statement about a shuffle is most accurate?
Select an answer to check.
Answer: Data exchange across nodes by key.
The best option here is Data exchange across nodes by key.. Expensive; minimize. That is exactly the concept behind which statement about a shuffle is most accurate in this context. Competing choices sound plausible, but they miss the key condition.
Q64. How is a shuffle best characterized?
Select an answer to check.
Answer: Data exchange across nodes by key.
For this question, Data exchange across nodes by key. is correct. Expensive; minimize. That is exactly the concept behind how is a shuffle best characterized in this context. Competing choices sound plausible, but they miss the key condition.
Q65. Which option best describes the DAG scheduler?
Select an answer to check.
Answer: Plans stages from logical lineage.
Plans stages from logical lineage. is the correct answer here. Driver-side. That is exactly the concept behind which option best describes the dag scheduler in this context. Competing choices sound plausible, but they miss the key condition.
Q66. What is the primary purpose of the DAG scheduler?
Select an answer to check.
Answer: Plans stages from logical lineage.
Here, Plans stages from logical lineage. is the right choice. Driver-side. It fits the requirement in the prompt about what is the primary purpose of the dag. Competing choices sound plausible, but they miss the key condition.
Q67. Which statement about the DAG scheduler is most accurate?
Select an answer to check.
Answer: Plans stages from logical lineage.
In this case, Plans stages from logical lineage. is correct. Driver-side. It fits the requirement in the prompt about which statement about the dag scheduler is most. Competing choices sound plausible, but they miss the key condition.
Q68. How is the DAG scheduler best characterized?
Select an answer to check.
Answer: Plans stages from logical lineage.
The best option here is Plans stages from logical lineage.. Driver-side. It fits the requirement in the prompt about how is the dag scheduler best characterized. Competing choices sound plausible, but they miss the key condition.
Q69. Which option best describes the task scheduler?
Select an answer to check.
Answer: Submits tasks to executors.
For this question, Submits tasks to executors. is correct. Driver-side. It fits the requirement in the prompt about which option best describes the task scheduler. Competing choices sound plausible, but they miss the key condition.
Q70. What is the primary purpose of the task scheduler?
Select an answer to check.
Answer: Submits tasks to executors.
Submits tasks to executors. is the correct answer here. Driver-side. It fits the requirement in the prompt about what is the primary purpose of the task. Competing choices sound plausible, but they miss the key condition.
Q71. Which statement about the task scheduler is most accurate?
Select an answer to check.
Answer: Submits tasks to executors.
Here, Submits tasks to executors. is the right choice. Driver-side. This is the most accurate statement for which statement about the task scheduler is most. Competing choices sound plausible, but they miss the key condition.
Q72. How is the task scheduler best characterized?
Select an answer to check.
Answer: Submits tasks to executors.
In this case, Submits tasks to executors. is correct. Driver-side. This is the most accurate statement for how is the task scheduler best characterized. Competing choices sound plausible, but they miss the key condition.
Q73. Which option best describes cluster managers?
Select an answer to check.
Answer: YARN, Kubernetes, Standalone, Mesos.
The best option here is YARN, Kubernetes, Standalone, Mesos.. Allocate resources. This is the most accurate statement for which option best describes cluster managers. Competing choices sound plausible, but they miss the key condition.
Q74. What is the primary purpose of cluster managers?
Select an answer to check.
Answer: YARN, Kubernetes, Standalone, Mesos.
For this question, YARN, Kubernetes, Standalone, Mesos. is correct. Allocate resources. This is the most accurate statement for what is the primary purpose of cluster managers. Competing choices sound plausible, but they miss the key condition.
Q75. Which statement about cluster managers is most accurate?
Select an answer to check.
Answer: YARN, Kubernetes, Standalone, Mesos.
YARN, Kubernetes, Standalone, Mesos. is the correct answer here. Allocate resources. This is the most accurate statement for which statement about cluster managers is most accurate. Competing choices sound plausible, but they miss the key condition.
Q76. How is cluster managers best characterized?
Select an answer to check.
Answer: YARN, Kubernetes, Standalone, Mesos.
Here, YARN, Kubernetes, Standalone, Mesos. is the right choice. Allocate resources. It aligns directly with what the question asks about how is cluster managers best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q77. Which option best describes caching/persisting?
Select an answer to check.
Answer: Keep data in memory/disk for reuse.
In this case, Keep data in memory/disk for reuse. is correct. Use for repeated reads. It aligns directly with what the question asks about which option best describes caching/persisting. The remaining choices fail because they don’t satisfy the full definition.
Q78. What is the primary purpose of caching/persisting?
Select an answer to check.
Answer: Keep data in memory/disk for reuse.
The best option here is Keep data in memory/disk for reuse.. Use for repeated reads. It aligns directly with what the question asks about what is the primary purpose of caching/persisting. The remaining choices fail because they don’t satisfy the full definition.
Q79. Which statement about caching/persisting is most accurate?
Select an answer to check.
Answer: Keep data in memory/disk for reuse.
For this question, Keep data in memory/disk for reuse. is correct. Use for repeated reads. It aligns directly with what the question asks about which statement about caching/persisting is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q80. How is caching/persisting best characterized?
Select an answer to check.
Answer: Keep data in memory/disk for reuse.
Keep data in memory/disk for reuse. is the correct answer here. Use for repeated reads. It aligns directly with what the question asks about how is caching/persisting best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q81. Which option best describes checkpointing?
Select an answer to check.
Answer: Persist RDDs to reliable storage cutting lineage.
Here, Persist RDDs to reliable storage cutting lineage. is the right choice. For long lineages or streaming state. This matches the core idea being tested around which option best describes checkpointing. The remaining choices fail because they don’t satisfy the full definition.
Q82. What is the primary purpose of checkpointing?
Select an answer to check.
Answer: Persist RDDs to reliable storage cutting lineage.
In this case, Persist RDDs to reliable storage cutting lineage. is correct. For long lineages or streaming state. This matches the core idea being tested around what is the primary purpose of checkpointing. The remaining choices fail because they don’t satisfy the full definition.
Q83. Which statement about checkpointing is most accurate?
Select an answer to check.
Answer: Persist RDDs to reliable storage cutting lineage.
The best option here is Persist RDDs to reliable storage cutting lineage.. For long lineages or streaming state. This matches the core idea being tested around which statement about checkpointing is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q84. How is checkpointing best characterized?
Select an answer to check.
Answer: Persist RDDs to reliable storage cutting lineage.
For this question, Persist RDDs to reliable storage cutting lineage. is correct. For long lineages or streaming state. This matches the core idea being tested around how is checkpointing best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q85. Which option best describes broadcast variables?
Select an answer to check.
Answer: Read-only values shipped efficiently to all nodes.
Read-only values shipped efficiently to all nodes. is the correct answer here. Useful for small lookup tables. This matches the core idea being tested around which option best describes broadcast variables. The remaining choices fail because they don’t satisfy the full definition.
Q86. What is the primary purpose of broadcast variables?
Select an answer to check.
Answer: Read-only values shipped efficiently to all nodes.
Here, Read-only values shipped efficiently to all nodes. is the right choice. Useful for small lookup tables. That is exactly the concept behind what is the primary purpose of broadcast variables in this context. The remaining choices fail because they don’t satisfy the full definition.
Q87. Which statement about broadcast variables is most accurate?
Select an answer to check.
Answer: Read-only values shipped efficiently to all nodes.
In this case, Read-only values shipped efficiently to all nodes. is correct. Useful for small lookup tables. That is exactly the concept behind which statement about broadcast variables is most accurate in this context. The remaining choices fail because they don’t satisfy the full definition.
Q88. How is broadcast variables best characterized?
Select an answer to check.
Answer: Read-only values shipped efficiently to all nodes.
The best option here is Read-only values shipped efficiently to all nodes.. Useful for small lookup tables. That is exactly the concept behind how is broadcast variables best characterized in this context. The remaining choices fail because they don’t satisfy the full definition.
Q89. Which option best describes accumulators?
Select an answer to check.
Answer: Add-only variables aggregated across tasks.
For this question, Add-only variables aggregated across tasks. is correct. Use carefully (semantics). That is exactly the concept behind which option best describes accumulators in this context. The remaining choices fail because they don’t satisfy the full definition.
Q90. What is the primary purpose of accumulators?
Select an answer to check.
Answer: Add-only variables aggregated across tasks.
Add-only variables aggregated across tasks. is the correct answer here. Use carefully (semantics). That is exactly the concept behind what is the primary purpose of accumulators in this context. The remaining choices fail because they don’t satisfy the full definition.
Q91. Which statement about accumulators is most accurate?
Select an answer to check.
Answer: Add-only variables aggregated across tasks.
Here, Add-only variables aggregated across tasks. is the right choice. Use carefully (semantics). It fits the requirement in the prompt about which statement about accumulators is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q92. How is accumulators best characterized?
Select an answer to check.
Answer: Add-only variables aggregated across tasks.
In this case, Add-only variables aggregated across tasks. is correct. Use carefully (semantics). It fits the requirement in the prompt about how is accumulators best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q93. Which option best describes structured APIs vs RDD?
Select an answer to check.
Answer: DF/Dataset benefit from Catalyst; RDD is low-level.
The best option here is DF/Dataset benefit from Catalyst; RDD is low-level.. Prefer structured APIs. It fits the requirement in the prompt about which option best describes structured apis vs rdd. The remaining choices fail because they don’t satisfy the full definition.
Q94. What is the primary purpose of structured APIs vs RDD?
Select an answer to check.
Answer: DF/Dataset benefit from Catalyst; RDD is low-level.
For this question, DF/Dataset benefit from Catalyst; RDD is low-level. is correct. Prefer structured APIs. It fits the requirement in the prompt about what is the primary purpose of structured apis. The remaining choices fail because they don’t satisfy the full definition.
Q95. Which statement about structured APIs vs RDD is most accurate?
Select an answer to check.
Answer: DF/Dataset benefit from Catalyst; RDD is low-level.
DF/Dataset benefit from Catalyst; RDD is low-level. is the correct answer here. Prefer structured APIs. It fits the requirement in the prompt about which statement about structured apis vs rdd is. The remaining choices fail because they don’t satisfy the full definition.
Q96. How is structured APIs vs RDD best characterized?
Select an answer to check.
Answer: DF/Dataset benefit from Catalyst; RDD is low-level.
Here, DF/Dataset benefit from Catalyst; RDD is low-level. is the right choice. Prefer structured APIs. This is the most accurate statement for how is structured apis vs rdd best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q97. Which option best describes read/write APIs?
Select an answer to check.
Answer: spark.read / df.write with formats.
In this case, spark.read / df.write with formats. is correct. Parquet, JSON, JDBC, etc. This is the most accurate statement for which option best describes read/write apis. The remaining choices fail because they don’t satisfy the full definition.
Q98. What is the primary purpose of read/write APIs?
Select an answer to check.
Answer: spark.read / df.write with formats.
The best option here is spark.read / df.write with formats.. Parquet, JSON, JDBC, etc. This is the most accurate statement for what is the primary purpose of read/write apis. The remaining choices fail because they don’t satisfy the full definition.
Q99. Which statement about read/write APIs is most accurate?
Select an answer to check.
Answer: spark.read / df.write with formats.
For this question, spark.read / df.write with formats. is correct. Parquet, JSON, JDBC, etc. This is the most accurate statement for which statement about read/write apis is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q100. How is read/write APIs best characterized?
Select an answer to check.
Answer: spark.read / df.write with formats.
spark.read / df.write with formats. is the correct answer here. Parquet, JSON, JDBC, etc. This is the most accurate statement for how is read/write apis best characterized. The remaining choices fail because they don’t satisfy the full definition.