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Quiz: Dynamo
Test your knowledge of Dynamo by completing this quiz.
Quiz
Statement
In CAP theorem terms, Dynamo is ___ system?
Select Multiple Options
AP (Available and Partition Tolerant)
CP (Consistent and Partition Tolerant)
CA (Consistent and Available)
Quiz
Statement
Amazon Dynamo is called a zero-hop DHT because:
Select Multiple Options
A collision-free hash function is used.
Consistent hashing allows the system to grow.
Clients know the complete set of servers and can directly contact the server that holds the data they need.
Each server node maintains a finger table that identifies other nodes.
Quiz
Statement
Does Dynamo always write data to the first 'N' nodes in the preference list?
Select Option
True
False
Quiz
Statement
How does Dynamo resolve conflicts between different versions of data?
Select Multiple Options
Merkle tree
Hinted handoff
Vector clock
Gossip protocol
Quiz
Statement
What strategies can be used to resolve data conflicts? Select all that apply.
Select Multiple Options
Last write wins
Conflict-free replicated data types (CRDTs).
Sloppy quorum
Vector clocks
Quiz
Statement
How does Dynamo handle temporary node failures? Select all that apply.
Select Multiple Options
Merkle tree
Hinted handoff
Sloppy quorum
Gossip protocol
Quiz
Statement
What are the benefits of Vnodes in Dynamo? Select all that apply.
Select Multiple Options
Vnodes help spread the load more evenly across the physical nodes on the cluster. This speeds up the rebalancing process after adding or removing nodes.
Vnodes enable the use of virtual machines to help Dynamo scale better.
Vnodes make it easier to maintain a cluster containing heterogeneous machines.
Use of Vnodes decreases the probability of hotspots, as Vnodes help assign smaller ranges to each physical node.
Quiz
Statement
What is optimistic replication in Dynamo?
Select Multiple Options
When replicating, Dynamo chooses the closest nodes to the coordinator node to store the replicas.
Dynamo tries to distribute replicas on different racks.
Replicas may diverge and are not guaranteed to be identical at all times.
All replicas are updated atomically, ensuring ACID semantics.
Quiz
Statement
Dynamo uses Vector clocks to:
Select Multiple Options
Impose a total ordering of all get and put operations in the system.
Disallow concurrent updates of the same object by choosing the earliest writer.
Determine the sequence of write operations across multiple objects.
Identify conflicting versions of the same object stored on different servers.
Quiz
Statement
Dynamo optimizes key lookups via:
Select Multiple Options
Consistent hashing
Finger tables
Storing the table of all nodes in the system at each node.
Storing all key-value sets in a hash table at each node.
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