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Write a short note on oracle Instance?
Oracle Instances: An instance is the (executed) Oracle software and the memory they use. It is the instance which manipulates the data stored within the database. It can be begin independent of any database. It consists of:
1) A shared memory area which gives the communication among several processes.2) Upto five background processes that handled several tasks. Whenever an oracle examples starts, the file ‘INIT.ORA' is executed.
a. Define the term "deadlock". There are four conditions that must hold before deadlock is possible. Name them. b. Outline an algorithm that detects whether there is a deadlock.
Question (a) Concurrent access to data from a database is a normal part of application program usage. Describe three approaches to concurrency control (b) Distinguish among
Explain the Natural join Natural join is a binary operator which is written as (R* S) in which R and S are relations. The effect of the natural join is the set of all combinati
The basic merits of decomposition. The Advantages of Decomposition 1. Separate person can work on each subsystem. 2. A particular software engineer can specialize in a
explain cascading rollback
Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes
What is multiple relationship ?
Explain Recursive relationship type? Recursive relationship type: A recursive relationship is one in that the similar entity participates more than once in the relationship
Prepare a data flow diagram for computing the volume and surface area of a cylinder. Inputs are the height and radius of the cylinder. Outputs are the volume and surface area of th
Natural Join : It is the similar like Equi join except one of the duplicate columns is removed in the result table. The natural join is the most usually used form of join operation
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