Uniprocessor systems have traditionally observed strict consistency and uniproce

Question

Uniprocessor systems have traditionally observed strict consistency and uniprocessor programmers have come to expect such behavior.
    a. true
    b. false

In contrast to permanent replicas, server-initiated replicas are copies of a data store that exist to enhance performance and which are created at the initiative of the (owner of the) data store.
    a. true
    b. false

One approach to supporting replicated writes is to use voting. The basic idea is to require clients to request and acquire the permission of multiple servers before either reading or writing a replicated data item. This approach is called:
    a. gerrymandering
    b. gossiping
    c. primary-election
    d. quorum-based

Monotonic reads are an example of client-centric consistency model.
    a. true
    b. false

Writing an exception or signal handler to be invoked when clients and servers have a mismatch is an example of how a programmer can maintain transparency.
    a. true
    b. false

Explanation / Answer

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1. Uniprocessors follow strict consistency and uniprocessor programmers have come to expect such behavior hence this statement is TRUE.

2. The server initiated replicas are copies of a data store which exists only to enhance performance and which are created at the initiation of data store. Hence the statement is TRUE.

3. Quorum based approach requires clients to request and acquire the permission of multiple servers before either reading or writing a replicated data item. Hence correct option is quorum based approach.

4. Monotonic reads and Monotonic writes both are types of client centric consistency model. Hence the given statement is TRUE.

5. Transparency is to hide details of moving data and processes without disturbing the running operations. Hence this statement is FALSE.

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