Objectives:

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$-$ Learn distributed database concepts

Answer the following:

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$1)$ What are the main reasons for and potential advantages of distributed databases?

$2)$ What additional functions does a DDBMS have over t centralized DBMS$?3)$ Compare the two$-$tier and the three$-$tier client$/$server architecture $4)$ Why is data replication is useful in DDBMS$?$

$5)$ What is a fragment of a relation? What are the main types of fragments? Why fragmentation is useful concept in distributed databases?

$6)$ Discuss the naming problem in distributed databases

$7)$ Compare the primary cite method with the primary copy method for distributed concurrency control

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