Describe Pravega and Its Storage Architecture DATA-ENGINEERING-OPTIMIZE Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A social media analytics company uses Pravega to stream user interaction events. They need to scale the stream to handle increasing write throughput. What is the correct way to scale a Pravega stream?

   • AIncrease the retention period of the stream.
   • BIncrease the number of segments in the stream, either manually or automatically via auto-scaling.
   • CAdd more readers to the reader group.
   • DUpgrade the durable tier to a faster storage system.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   What consistency model does Pravega provide for readers?

   • AStrong consistency, where all readers see the same events in the same order.
   • BRead-your-writes consistency only for the writer.
   • CEventual consistency, where readers may see different states at different times.
   • DNo consistency guarantees; readers must handle ordering themselves.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which statement accurately describes Pravega's tiered storage model?

   • AData is stored in a single tier that provides both low latency and long-term durability.
   • BData is written directly to long-term storage to ensure durability at the cost of write latency.
   • CData is first written to a low-latency tier and then asynchronously moved to a durable long-term storage tier.
   • DData is stored in memory only and never persisted to disk.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A media streaming company is evaluating Pravega for storing video metadata. They need to understand how data is organized within a stream to plan for scaling. Which statement accurately describes the relationship between streams, segments, and tiered storage in Pravega?

   • AA stream is stored as a single unit in the durable tier, with segments used only for indexing.
   • BA stream is divided into segments, and each segment is stored in both the low-latency tier and the durable tier.
   • CSegments are independent of streams and can be shared across multiple streams.
   • DThe low-latency tier stores entire streams, while the durable tier stores only segments.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A company uses Pravega with Apache Flink to process IoT sensor data. They need to ensure that the Flink job can recover from a failure without reprocessing events that were already processed. Which Pravega feature, combined with Flink's checkpointing, enables this?

   • AAppend-only writes that prevent modification of events.
   • BStream cuts that allow the Flink job to resume reading from a specific position.
   • CAutomatic segment scaling that adjusts to the job's parallelism.
   • DThe durable tier's long-term retention of all events.
   Reveal Solution Discussion Select an answer first