Quiz - Parallel & Distributed Computing - May 25

Which fault detection technique uses checksums or hashing?

• Heartbeat mechanisms

• Data replication

• Monitoring and logging

• Verifying data integrity

How does Google's Bigtable handle node failures?

• By utilizing active-passive failover mechanisms

• By redistributing data and tasks across remaining nodes automatically

• By using periodic checkpointing

• By employing rollback recovery techniques

Which technique involves saving the state of a system periodically to restore it in case of failure?

• Data replication

• Rollback recovery

• Checkpointing

• Active-passive failover

Which quantum algorithm can factorize large numbers exponentially faster than classical algorithms?

• Grover's algorithm

• Shor's algorithm

• Quantum Approximate Optimization Algorithm (QAOA)

• Simon's algorithm

Which of the following is a fault recovery technique where multiple service instances maintain the same state?

• Data replication

• State machine replication

• Checkpointing

• Active-passive failover

Which of the following describes active-active failover?

• One active node provides the service while a passive node stands by

• Multiple active nodes provide service simultaneously

• Using multiple replicas to store data

• Rolling back the system to a previous state upon failure

What is a major benefit of using quantum computers for simulations?

• They require less energy

• They can simulate quantum systems efficiently

• They are easier to program than classical computers

• They have higher storage capacity

In the context of Amazon DynamoDB, what ensures that data remains available even in the event of a node or availability zone failure?

• Checkpointing

• Data replication across multiple availability zones

• Heartbeat mechanisms

• Active-passive failover

How do heartbeat mechanisms work in fault detection?

• By verifying data integrity using checksums

• By periodically sending signals between nodes to check if they are operational

• By continuously monitoring and logging system operations

• By adding extra components to the system

What is fault tolerance in the context of distributed systems?

• The ability of a system to recover from hardware failures only

• The ability of a system to continue operating correctly even when some of its components fail

• The process of adding more nodes to a distributed system

• The mechanism to optimize system performance