Practice Spark Streaming 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 update output mode is most accurate?
Select an answer to check.
Answer: Updated rows since last batch are output.
Here, Updated rows since last batch are output. is the right choice. For aggregations. It aligns directly with what the question asks about which statement about update output mode is most. Competing choices sound plausible, but they miss the key condition.
Q52. How is update output mode best characterized?
Select an answer to check.
Answer: Updated rows since last batch are output.
In this case, Updated rows since last batch are output. is correct. For aggregations. It aligns directly with what the question asks about how is update output mode best characterized. Competing choices sound plausible, but they miss the key condition.
Q53. Which option best describes complete output mode?
Select an answer to check.
Answer: Whole result table written each batch.
The best option here is Whole result table written each batch.. Small aggregations only. It aligns directly with what the question asks about which option best describes complete output mode. Competing choices sound plausible, but they miss the key condition.
Q54. What is the primary purpose of complete output mode?
Select an answer to check.
Answer: Whole result table written each batch.
For this question, Whole result table written each batch. is correct. Small aggregations only. It aligns directly with what the question asks about what is the primary purpose of complete output. Competing choices sound plausible, but they miss the key condition.
Q55. Which statement about complete output mode is most accurate?
Select an answer to check.
Answer: Whole result table written each batch.
Whole result table written each batch. is the correct answer here. Small aggregations only. It aligns directly with what the question asks about which statement about complete output mode is most. Competing choices sound plausible, but they miss the key condition.
Q56. How is complete output mode best characterized?
Select an answer to check.
Answer: Whole result table written each batch.
Here, Whole result table written each batch. is the right choice. Small aggregations only. This matches the core idea being tested around how is complete output mode best characterized. Competing choices sound plausible, but they miss the key condition.
Q57. Which option best describes Kafka source?
Select an answer to check.
Answer: Read events from Kafka topics.
In this case, Read events from Kafka topics. is correct. Common streaming source. This matches the core idea being tested around which option best describes kafka source. Competing choices sound plausible, but they miss the key condition.
Q58. What is the primary purpose of Kafka source?
Select an answer to check.
Answer: Read events from Kafka topics.
The best option here is Read events from Kafka topics.. Common streaming source. This matches the core idea being tested around what is the primary purpose of kafka source. Competing choices sound plausible, but they miss the key condition.
Q59. Which statement about Kafka source is most accurate?
Select an answer to check.
Answer: Read events from Kafka topics.
For this question, Read events from Kafka topics. is correct. Common streaming source. This matches the core idea being tested around which statement about kafka source is most accurate. Competing choices sound plausible, but they miss the key condition.
Q60. How is Kafka source best characterized?
Select an answer to check.
Answer: Read events from Kafka topics.
Read events from Kafka topics. is the correct answer here. Common streaming source. This matches the core idea being tested around how is kafka source best characterized. Competing choices sound plausible, but they miss the key condition.
Q61. Which option best describes file source?
Select an answer to check.
Answer: Watch a directory for new files.
Here, Watch a directory for new files. is the right choice. Trigger off new arrivals. That is exactly the concept behind which option best describes file source in this context. Competing choices sound plausible, but they miss the key condition.
Q62. What is the primary purpose of file source?
Select an answer to check.
Answer: Watch a directory for new files.
In this case, Watch a directory for new files. is correct. Trigger off new arrivals. That is exactly the concept behind what is the primary purpose of file source in this context. Competing choices sound plausible, but they miss the key condition.
Q63. Which statement about file source is most accurate?
Select an answer to check.
Answer: Watch a directory for new files.
The best option here is Watch a directory for new files.. Trigger off new arrivals. That is exactly the concept behind which statement about file source is most accurate in this context. Competing choices sound plausible, but they miss the key condition.
Q64. How is file source best characterized?
Select an answer to check.
Answer: Watch a directory for new files.
For this question, Watch a directory for new files. is correct. Trigger off new arrivals. That is exactly the concept behind how is file source best characterized in this context. Competing choices sound plausible, but they miss the key condition.
Q65. Which option best describes rate source?
Select an answer to check.
Answer: Test source generating events at a rate.
Test source generating events at a rate. is the correct answer here. For testing only. That is exactly the concept behind which option best describes rate source in this context. Competing choices sound plausible, but they miss the key condition.
Q66. What is the primary purpose of rate source?
Select an answer to check.
Answer: Test source generating events at a rate.
Here, Test source generating events at a rate. is the right choice. For testing only. It fits the requirement in the prompt about what is the primary purpose of rate source. Competing choices sound plausible, but they miss the key condition.
Q67. Which statement about rate source is most accurate?
Select an answer to check.
Answer: Test source generating events at a rate.
In this case, Test source generating events at a rate. is correct. For testing only. It fits the requirement in the prompt about which statement about rate source is most accurate. Competing choices sound plausible, but they miss the key condition.
Q68. How is rate source best characterized?
Select an answer to check.
Answer: Test source generating events at a rate.
The best option here is Test source generating events at a rate.. For testing only. It fits the requirement in the prompt about how is rate source best characterized. Competing choices sound plausible, but they miss the key condition.
Q69. Which option best describes a sink?
Select an answer to check.
Answer: Where output is written (Kafka, files, console).
For this question, Where output is written (Kafka, files, console). is correct. Various built-ins + foreach. It fits the requirement in the prompt about which option best describes a sink. Competing choices sound plausible, but they miss the key condition.
Q70. What is the primary purpose of a sink?
Select an answer to check.
Answer: Where output is written (Kafka, files, console).
Where output is written (Kafka, files, console). is the correct answer here. Various built-ins + foreach. It fits the requirement in the prompt about what is the primary purpose of a sink. Competing choices sound plausible, but they miss the key condition.
Q71. Which statement about a sink is most accurate?
Select an answer to check.
Answer: Where output is written (Kafka, files, console).
Here, Where output is written (Kafka, files, console). is the right choice. Various built-ins + foreach. This is the most accurate statement for which statement about a sink is most accurate. Competing choices sound plausible, but they miss the key condition.
Q72. How is a sink best characterized?
Select an answer to check.
Answer: Where output is written (Kafka, files, console).
In this case, Where output is written (Kafka, files, console). is correct. Various built-ins + foreach. This is the most accurate statement for how is a sink best characterized. Competing choices sound plausible, but they miss the key condition.
Q73. Which option best describes foreach sink?
Select an answer to check.
Answer: Custom per-row output to any system.
The best option here is Custom per-row output to any system.. For arbitrary destinations. This is the most accurate statement for which option best describes foreach sink. Competing choices sound plausible, but they miss the key condition.
Q74. What is the primary purpose of foreach sink?
Select an answer to check.
Answer: Custom per-row output to any system.
For this question, Custom per-row output to any system. is correct. For arbitrary destinations. This is the most accurate statement for what is the primary purpose of foreach sink. Competing choices sound plausible, but they miss the key condition.
Q75. Which statement about foreach sink is most accurate?
Select an answer to check.
Answer: Custom per-row output to any system.
Custom per-row output to any system. is the correct answer here. For arbitrary destinations. This is the most accurate statement for which statement about foreach sink is most accurate. Competing choices sound plausible, but they miss the key condition.
Q76. How is foreach sink best characterized?
Select an answer to check.
Answer: Custom per-row output to any system.
Here, Custom per-row output to any system. is the right choice. For arbitrary destinations. It aligns directly with what the question asks about how is foreach sink best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q77. Which option best describes foreachBatch sink?
Select an answer to check.
Answer: Per-microbatch arbitrary write logic.
In this case, Per-microbatch arbitrary write logic. is correct. Idempotent custom writes. It aligns directly with what the question asks about which option best describes foreachbatch sink. The remaining choices fail because they don’t satisfy the full definition.
Q78. What is the primary purpose of foreachBatch sink?
Select an answer to check.
Answer: Per-microbatch arbitrary write logic.
The best option here is Per-microbatch arbitrary write logic.. Idempotent custom writes. It aligns directly with what the question asks about what is the primary purpose of foreachbatch sink. The remaining choices fail because they don’t satisfy the full definition.
Q79. Which statement about foreachBatch sink is most accurate?
Select an answer to check.
Answer: Per-microbatch arbitrary write logic.
For this question, Per-microbatch arbitrary write logic. is correct. Idempotent custom writes. It aligns directly with what the question asks about which statement about foreachbatch sink is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q80. How is foreachBatch sink best characterized?
Select an answer to check.
Answer: Per-microbatch arbitrary write logic.
Per-microbatch arbitrary write logic. is the correct answer here. Idempotent custom writes. It aligns directly with what the question asks about how is foreachbatch sink best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q81. Which option best describes checkpointing in streaming?
Select an answer to check.
Answer: Persist state/offsets for recovery.
Here, Persist state/offsets for recovery. is the right choice. Required for stateful queries. This matches the core idea being tested around which option best describes checkpointing in streaming. The remaining choices fail because they don’t satisfy the full definition.
Q82. What is the primary purpose of checkpointing in streaming?
Select an answer to check.
Answer: Persist state/offsets for recovery.
In this case, Persist state/offsets for recovery. is correct. Required for stateful queries. This matches the core idea being tested around what is the primary purpose of checkpointing in. The remaining choices fail because they don’t satisfy the full definition.
Q83. Which statement about checkpointing in streaming is most accurate?
Select an answer to check.
Answer: Persist state/offsets for recovery.
The best option here is Persist state/offsets for recovery.. Required for stateful queries. This matches the core idea being tested around which statement about checkpointing in streaming is most. The remaining choices fail because they don’t satisfy the full definition.
Q84. How is checkpointing in streaming best characterized?
Select an answer to check.
Answer: Persist state/offsets for recovery.
For this question, Persist state/offsets for recovery. is correct. Required for stateful queries. This matches the core idea being tested around how is checkpointing in streaming best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q85. Which option best describes state store?
Select an answer to check.
Answer: Stores aggregation/join state across batches.
Stores aggregation/join state across batches. is the correct answer here. RocksDB or in-memory. This matches the core idea being tested around which option best describes state store. The remaining choices fail because they don’t satisfy the full definition.
Q86. What is the primary purpose of state store?
Select an answer to check.
Answer: Stores aggregation/join state across batches.
Here, Stores aggregation/join state across batches. is the right choice. RocksDB or in-memory. That is exactly the concept behind what is the primary purpose of state store in this context. The remaining choices fail because they don’t satisfy the full definition.
Q87. Which statement about state store is most accurate?
Select an answer to check.
Answer: Stores aggregation/join state across batches.
In this case, Stores aggregation/join state across batches. is correct. RocksDB or in-memory. That is exactly the concept behind which statement about state store is most accurate in this context. The remaining choices fail because they don’t satisfy the full definition.
Q88. How is state store best characterized?
Select an answer to check.
Answer: Stores aggregation/join state across batches.
The best option here is Stores aggregation/join state across batches.. RocksDB or in-memory. That is exactly the concept behind how is state store best characterized in this context. The remaining choices fail because they don’t satisfy the full definition.
Q89. Which option best describes exactly-once with idempotent sink?
Select an answer to check.
Answer: Effective exactly-once via dedup at sink.
For this question, Effective exactly-once via dedup at sink. is correct. Requires idempotent writes. That is exactly the concept behind which option best describes exactly-once with idempotent sink in this context. The remaining choices fail because they don’t satisfy the full definition.
Q90. What is the primary purpose of exactly-once with idempotent sink?
Select an answer to check.
Answer: Effective exactly-once via dedup at sink.
Effective exactly-once via dedup at sink. is the correct answer here. Requires idempotent writes. That is exactly the concept behind what is the primary purpose of exactly-once with in this context. The remaining choices fail because they don’t satisfy the full definition.
Q91. Which statement about exactly-once with idempotent sink is most accurate?
Select an answer to check.
Answer: Effective exactly-once via dedup at sink.
Here, Effective exactly-once via dedup at sink. is the right choice. Requires idempotent writes. It fits the requirement in the prompt about which statement about exactly-once with idempotent sink is. The remaining choices fail because they don’t satisfy the full definition.
Q92. How is exactly-once with idempotent sink best characterized?
Select an answer to check.
Answer: Effective exactly-once via dedup at sink.
In this case, Effective exactly-once via dedup at sink. is correct. Requires idempotent writes. It fits the requirement in the prompt about how is exactly-once with idempotent sink best characterized. The remaining choices fail because they don’t satisfy the full definition.
The best option here is ProcessingTime, Once, AvailableNow, Continuous.. Control batch cadence. It fits the requirement in the prompt about which option best describes trigger options. The remaining choices fail because they don’t satisfy the full definition.
Q94. What is the primary purpose of trigger options?
For this question, ProcessingTime, Once, AvailableNow, Continuous. is correct. Control batch cadence. It fits the requirement in the prompt about what is the primary purpose of trigger options. The remaining choices fail because they don’t satisfy the full definition.
Q95. Which statement about trigger options is most accurate?
ProcessingTime, Once, AvailableNow, Continuous. is the correct answer here. Control batch cadence. It fits the requirement in the prompt about which statement about trigger options is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Here, ProcessingTime, Once, AvailableNow, Continuous. is the right choice. Control batch cadence. This is the most accurate statement for how is trigger options best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q97. Which option best describes backpressure?
Select an answer to check.
Answer: Adaptive ingestion rate based on latency.
In this case, Adaptive ingestion rate based on latency. is correct. Stable systems. This is the most accurate statement for which option best describes backpressure. The remaining choices fail because they don’t satisfy the full definition.
Q98. What is the primary purpose of backpressure?
Select an answer to check.
Answer: Adaptive ingestion rate based on latency.
The best option here is Adaptive ingestion rate based on latency.. Stable systems. This is the most accurate statement for what is the primary purpose of backpressure. The remaining choices fail because they don’t satisfy the full definition.
Q99. Which statement about backpressure is most accurate?
Select an answer to check.
Answer: Adaptive ingestion rate based on latency.
For this question, Adaptive ingestion rate based on latency. is correct. Stable systems. This is the most accurate statement for which statement about backpressure is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q100. How is backpressure best characterized?
Select an answer to check.
Answer: Adaptive ingestion rate based on latency.
Adaptive ingestion rate based on latency. is the correct answer here. Stable systems. This is the most accurate statement for how is backpressure best characterized. The remaining choices fail because they don’t satisfy the full definition.