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Illustrate different types of Locks in SQL Server.
There are three kinds of locks in SQL Server
i.) Shared locks - These are used for operations which don't allow any update or change of data. For example SELECT.
ii.) Update locks - These are used when SQL Server wants to modify a page. Update page lock is then promoted to an exclusive page lock before actually making changes.
iii.) Exclusive locks - they are used for data modification operations. For example UPDATE, INSERT, or DELETE.
Discuss the differences among the candidate keys and the primary key of a relation. Give instance to describe your answer? A candidate key is one that can be used as primary ke
Explain the two types of participation constraint. 1. Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates i
Hierarchical
what factors might influence a company to outsource its IT infrascture.
What is a Phantom Deadlock? In distributed deadlock detection, the delay in propagating local information might cause the deadlock detection algorithms to recognize deadlocks
Illustrate the Deployment Diagram A deployment diagram shows all nodes on network, their processor execution and interconnections. In a dynamic model, this is used to represen
Atomicity: It describes a transaction to be a one unit of processing. We can also say either a transaction will be finished completely or not at all. In the transaction example 1
Which two tools are used to administer users for Active Directory?
What is Secondary Index While making the index, generally the index table is kept in the primary memory (RAM) and the main table, because of its size is keeps in the secondary
What is bucket overflow and how bucket overflow is handled through Over Flow Chaining or Closed Hashing? Ans: Bucket: unit of storage holding records. Bucket is a disk block
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