Which of the following represents number of times the operation acquired the lock in the specified mode? - MongoDB Quiz

MongoDB - Quiz(MCQ)

Which of the following represents number of times the operation acquired the lock in the specified mode?

A)

system.profile.locks.acquireCount

B)

system.profile.locks.Count

C)

system.profile.locks.acquireWaitCount

D)

None of the above

Correct Answer : system.profile.locks.acquireCount

Explanation : system.profile.locks.acquireWaitCount is number of times the operation had to wait for the acquireCount lock acquisitions because the locks were held in a conflicting mode. acquireWaitCount is less than or equal to acquireCount.

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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