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.
4. What is a interrupt request.
The mechanism of initiating a hardware interrupt is called
as interrupt request.(IRQ).
5. What are the levels of abstraction.
Physical level: The lowest level of abstraction that
describes how a system actually stores data.
Logical level: The next level of abstraction that describes what
data the database stores ad what relationship exists among entire database.
View level: The highest level of abstraction that describes
only part of the database.
6. What is the formula for compression ratio.
Compression ratio=Compressed size/Uncompressed size
7. An Linear Programming Problem having 2 optimal solutions
Must have more than 2 optimal solutions.
8. The method of updating the main memory as soon as a word
is removed from cache is called as
Write back
9. What is the use of typedef.
Typedef allows users to define an identifier that would
represent a existing data type.
10. What is an abstract data type.
The technique of tieing the data ad functions into a single
unit is called as a abstract data type.
Example: Class.
11. What is lazy evaluation.
Lazy evaluation is an evaluation strategy which delays the
evaluation of a expression until its value is actually required and avoid
repeated evaluations.
It is also called as call by need technique.
12. Define ODA.
Open Document Architecture is a document interchange format
for transferring documents between open systems.
13. What is syndrome decoding.
Syndrome decoding is a highly efficient method of decoding a
linear code over a noisy channel.
A noisy channel is a channel in which errors are made.
Syndrome decoding is a minimum distance decoding using a
reduced lookup table.
Huffman code is an example of syndrome decoding.
14. What is MPI.
Message Passing Interface is a language independent
communication protocol used to program parallel computers.
15. What is cleanroom approach.
It is a software development approach to produce software
with a certifiable level of reliability.
Very Helpful.. Thanx NCS.
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