Experiment with all of the possible data request scenarios in a distributed database system.

The challenges with controlling concurrency are the same as they are with other distributed systems. The same issues apply to distributed databases. Is it required to employ concurrency control technologies such as 2PL (Two-phase locking) for a system with no duplicate components? Explain.

What are the potential problems that can arise in a multi-user database system without proper concurrency control mechanisms?

Do tests using each of the many data request situations that might arise in a distributed database system.

What is the use case for LDAP if it can be implemented on a database system?

Describe the ACID properties in the context of distributed database management. How do they apply to transactions in a distributed system?

How can we distinguish between a local-area network and a wide-area network using the structure and organisation of a distributed database?

If a distributed database needs to be set up in a certain way, what are the main differences between local area networks and wide area networks?

1) Write a method in java that performs the union operation on two integer arrays, i.e. it will createa new array that has the values from the two input arrays but with no duplicates.• The method must have the following signature:public static int[] union(int[] a1, int[] a2)• You can assume that no input array element will have a value less than 1.• Your method can return an array that is the same size as the two input arrays puttogether. This will mean, in general, the returned array will have too many elements.This is fine. Any elements you don’t need, you simply set to zero.• Implement this method using Java primitives only. You may use the array lengthproperty.• If you want to implement other methods to help you, you may do so. You must writethe method specified above, but you may write other methods to help you if you wantto. You must show the full implementation of any methods you create, however.

What is the meaning of completeness, reconstruction, and disjointness in distributed database