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File and system structure, Database Management System
Posted Date: 3/29/2013 11:59:16 AM | Location : USA
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What are wait-for-graphs, What are wait-for-graphs?Give the algorithm to co...
What are wait-for-graphs?Give the algorithm to construct a wait-for-graph from a given schedule of transactions? How can deadlocks be detected from wait-for-graphs? Ans: The
advantages of database over file system, Q. Why would you choose a datab...
Q. Why would you choose a database system instead of simply storing data in operating system file? Define at a base concept in details. Sol. Advantages of Database over Fil
Homework, can you resolve this for me please? Database Management Systems ...
can you resolve this for me please? Database Management Systems Homework 1 The following relations are given (primary keys are underlined): PLAY-ACTOR(AId, Name, Nationality, Birt
What you understand by client-server environment, Problem: a) Briefly d...
Problem: a) Briefly describe what you understand by Client-Server environment b) The File Server is a simple form of Client-Server. Describe the principles of the File Serve
Write a query to find name from the relational algebra, Consider the relati...
Consider the relations City (city_name, state) Hotel (name, address) City_hotel (hotel_name, city_name, owner) Answer the following queries in relational algebra (i) Find
Why are cursors necessary in embedded sql, Why are cursors necessary in emb...
Why are cursors necessary in embedded SQL? A cursor is an object used to store the output of a query for row-by-row processing through the application programs. SQL statements
What is the use of raid, What is the use of RAID? A variety of disk-org...
What is the use of RAID? A variety of disk-organization methods, collectively called redundant arrays of independent disks are used to better the performance and reliability.
Explain weak and strong entity sets, Explain weak and strong entity sets? ...
Explain weak and strong entity sets? Weak and Strong entity sets: A physically powerful entity set has a primary key. All tuples in the group are distinguishable through that k
Define the five basic operators of relational algebra, Define the five basi...
Define the five basic operators of relational algebra? Five basic operators of relational algebra are: 1. Union (∪∪∪∪) - Selects tuples which are in either P or Q or in both
What is the aim of logical schema, What is the aim of logical schema ? ...
What is the aim of logical schema ? The main motive of the logical schema is to ensure the portability of procedures and models on various physical schemas at runtime.
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