Question: a) Describe one of the possible problems generated by concurrent access to the same data and illustrates how the problem can be resolved by using

a) Describe one of the possible problems generated by concurrent access to the same data and illustrates how the problem can be resolved by using the locking mechanism (10 marks) b) Briefly explain granularity and how does granularity affects a transaction in a database environment (10 marks) (c) Briefly explain how a system recovery could be implemented by means of checkpoint

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