SOLVED MODEL PAPER FOR UGC NET
COMPUTER SCIENCE DECEMBER 2014
1. What is meant by concurrency control mechanism.
Concurrency helps to prevent updation of the same record by
two users at the same time.
For example, If a user is accessing a record, another user
cannot access it till the first user completes updation. So a lock is enabled
till a user completes the task. This is called as concurrency.
2. What are the levels of capability maturity model(CMM).
Level 1 – Initial
Level 2 – Repeatable
Level 3 - Defined
Level 4 – Managed
Level 5 – Optimizing
3. What is ATL.
The Active Template Library(ATL) is a set of template based
c++ classes to simplify the programming of Component Object Model(COM) objects.
COM helps to create a variety of COM objects,OLE automation
servers, Activex controls.