With MongoDB 3.0.0, the default use of the Power of _________ Allocations minimizes the occurrences of re-allocations as well as allows for the effective reuse of the freed record space. - MongoDB Quiz

MongoDB - Quiz(MCQ)

With MongoDB 3.0.0, the default use of the Power of _________ Allocations minimizes the occurrences of re-allocations as well as allows for the effective reuse of the freed record space.

A)

2 Sized

B)

3 Sized

C)

4 Sized

D)

5 Sized

Correct Answer : 2 Sized

Explanation : When using MMAPv1, if your applications require updates that will frequently cause document growth to exceeds the current power of 2 allocation, you may want to refactor your data model to use references between data in distinct documents rather than a denormalized data model.

Recently Updated in MongoDB Questions

_______ disable balancing on a single collection in a sharded database.

A)

TagRange()

B)

sh._checkMongos()

C)

sh.removeTagRange()

D)

sh.disableBalancing()

Correct Answer : sh.disableBalancing()

Explanation : sh.disableBalancing() does not affect balancing of other collections in a sharded cluster.

____ activates the sharded collection balancer process if previously disabled using sh.disableBalancing().

A)

sh.enableSharding()

B)

sh.enableBalancing()

C)

sh.getBalancerHost()

D)

All of the above

Correct Answer : sh.getBalancerHost()

Explanation : sh.enableSharding() enables sharding on a specific database.

_______ returns a boolean to report if the balancer is currently enabled.

A)

sh.enableBalancing()

B)

sh.getBalancerState()

C)

sh.getBalancerHost()

D)

None of the above

Correct Answer : sh.getBalancerState()

Explanation : sh.getBalancerState() returns true when the balancer is enabled and false if the balancer is disabled.

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