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!
Define granularity, hierarchy of granularity of locks & multiple granularity locking. Explain the modified two phase locking along with multiple granularity locking.
Ans: The size of the data item selected as a unit of protection through a concurrency control protocol is granularity.
When the granularity is denoted in a hierarchical structure in which each node denotes data items of different sizes we acquire the hierarchy of granularity.
In multiple granularity locking there are three kinds of locks - shared, exclusive and intention lock.
Modified two-phase locking strategy
1) No lock can be granted once any node has been unlocked
2) No node might be locked till its parent has an intention lock
3) No node might be unlocked till all its descendants are unlocked.
Describe the algorithm for updating indices for a single level index when a record is (i) Inserted (ii) deleted What will be the modification if there are multilevel in
Type of database technology
write a database program for concurrency transaction in a bank
Australian Bureau of Statistics (ABS) provides retail data for different groups and different states as well as the aggregate numbers. Table 11 " Retail Turnover, State by Industry
Example : Create a sequence named SEQSS that starts at 105, has a step of 1 and can take maximum value as 2000. CREATE SEQUENCE SEQSS START WITH 105 INCREMENT BY 1 MAX VA
#question.explain diversity and magnitude of organic compounds and general properties?
What is a view in SQL? When can views be updated? A view is a virtual table which consists of columns from one or more tables. Through it is same to a table; it is stored in
First Normal Form and second normal form First Normal Form (1NF) A relation is said to be in 1NF if it having no non-atomic values and each row can give a unique combinat
what is inverted and multilist structure
does tables are called relations
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd