Читать книгу Big Data - Seifedine Kadry - Страница 72

1 The set of loosely connected computers is called _____.LANWANWorkstationClusterAnswer:dExplanation: In a computer cluster all the participating computers work together on a particular task.

2 Cluster computing is classified intoHigh‐availability clusterLoad‐balancing clusterBoth a and bNone of the aboveAnswer:c

3 The computer cluster architecture emerged as a result of ____.ISAWorkstationSupercomputersDistributed systemsAnswer:dExplanation: A distributed system is a computer system spread out over a geographic area.

4 Cluster adopts _______ mechanism to eliminate the service interruptions.Sharding ReplicationFailoverPartitionAnswer:c

5 _______ is the process of switching to a redundant node upon the abnormal termination or failure of a previously active node.ShardingReplicationFailoverPartitionAnswer:c

6 _______ adds more storage resources and CPU to increase capacity.Horizontal scalingVertical scalingPartitionAll of the mentionedAnswer:bExplanation: When the primary steps down, the MongoDB closes all client connections.

7 _______ is the process of copying the same data blocks across multiple nodes.ReplicationPartitionShardingNone of the aboveAnswer:aExplanation: Replication is the process of copying the same data blocks across multiple nodes to overcome the loss of data when a node crashes.

8 _______ is the process of dividing the data set and distributing the data over multiple servers.VerticalShardingPartitionAll of the mentionedAnswer:bExplanation: Sharding is the process of partitioning very large data sets into smaller and easily manageable chunks called shards.

9 A sharded cluster is _______ to provide high availability.ReplicatedPartitionedClusteredNone of the aboveAnswer:aExplanation: Replication makes the system fault tolerant since the data is not lost when an individual node fails as the data is redundant across the nodes.

10 NoSQL databases exhibit ______ properties.ACIDBASEBoth a and bNone of the aboveAnswer:b