In a distributed database system, which approach is used to ensure that all copies of a data item are updated simultaneously?Immediate consistencyEventual consistencyQuorum consensusSerializability

In a scenario without concurrency control, what problem might arise when two transactions try to update the same data simultaneously?Reduce data consistencyImproved data consistency

For the consistency property of database transactions, it requires that the state of a database is consistent before and after each transaction, but the intermediate states of a database during a transaction do not need to be consistent.

Which strategy is commonly used for fault tolerance in distributed systems?Question 28Answera.Data encryptionb.Data aggregationc. Data compressiond. Data replication

Which consistency level is typically achieved in NoSQL databases? Question 7Select one: Immediate consistency Weak consistency Strong consistency Eventual consistency

Storing multiple copies of the same data within the system is not advisable, because it increasesData ConsistencyData RedundancyAtomicity of DataData Integrity