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What are deadlocks? How can they be avoided?
Ans: Deadlock considers to a particular condition when two or more processes are every waiting for another to release a resource, or much more than two processes are waiting for resources in a circular chain. Deadlock is a general problem in multiprocessing in which many processes share a particular type of mutually exclusive resource termed as a software, or soft, lock. Computers that are intended for the time-sharing and/or real-time markets are often equipped along with a hardware lock (or hard lock) that assures exclusive access to processes, forcing serialization. Deadlocks are specifically troubling as there is no general solution to avoid (soft) deadlocks.
One of the techniques of deadlock avoidance related to timestamps there are two types: wait-die and wound-wait.
limitations and benefits in database tecknowlagy
Write A short note on temporary tables? Temporary Tables - Temporary tables exists solely for a particular session, or whose data persists for the duration of the transaction
Related fields in a database are grouped in which form? Related data fields in a database are grouped to form a data record. (A record is a collection of related fields)
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
With the help of a suitable diagram gives module wise explanation of system architecture of DBMS.on..
what are the topics in data management
In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
What Is Recovery? During the life of a transaction, i.e., a after the start of a transaction but before the transaction commits, various changes may be made in a database state
What is NULL? Simply NULL means not in value.
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
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