Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
What are the disadvantages of file-processing system?
Ans: The Disadvantages of File-Processing System
a. Data redundancy and inconsistency - Data redundancy means not necessary duplication of data. In file processing systems, the information might be duplicated in various places (files) because of the different structure. This duplicity leads to higher storage access cost. Additionally, it may lead to data inconsistency, means the several copies of similar
b. Difficulty in accessing data - The conventional file-processing environments does not permit required data to be retrieved in convenient and well-organized manner
c. Data isolation - As data are scattered in several files and may be in dissimilar formats, writing new program to retrieve the suitable data is difficult.
d. Security problem - In file processing system. Enforcing security constraints is hard.
Describe the four main ways of optimising disk block access. Ans: a. Disk b. Non-volatile writes buffers c. File organization (Clustering) d. Log-based file system
What are the advantages and disadvantages of merging an association into a class? Advantages: i) Less number of tables ii) Faster performance due to the fewer tables
List the SQL domain Types? SQL supports the following domain types. 1) Char(n) 2) varchar(n) 3) int 4) numeric(p,d) 5) float(n) 6) date.
under what condition log based recovery is feasible?
Unrepeatable reads : Assume T7 reads X twice during its implementation. If it did not update X itself it could be very disturbing to see a dissimilar value of X in its next read. B
Define canonical cover? A canonical cover Fc for F is a set of dependencies like F logically implies all dependencies in FC and Fc logically shows all dependencies in F.
East Coast Aquarium Relational Database
am looking for assignment helper for dbms
What is the meaning of Recovery? In deferred update methods, if a transaction fails before arriving its commit point, it will not have altered the database in any way, so UNDO
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
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd