(Paper) Class XII Informatics Practices: Chapter Wise Papers (ADVANCED PROGRAMMING DEVELOPMENT METHODOLOGY)
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Class XII Informatics Practices Paper (Chapter Wise With Answer)
ADVANCED PROGRAMMING DEVELOPMENT METHODOLOGY
Q.1 What is SDLC?
Ans. The SDLC-System Development Life Cycle-is the set of activities that
are carried out to develop and implement an information system.
Q.2 Define cost-benefit analysis?
Ans. Cost-benefits analysis can be defined as the method by which we find
and estimate the value of the gross benefits of new system specifications.
Q.3 What are the differences between hardware, software and firmware?
Ans. Hardware is the physical tangible components of a computer system.
Software is the computer programs that are govern the operation of computers.
Firmware is the prewritten programs permanently stored in read-only memory.
These configure the computer and are not easily modifiable by the user.
Q.4 Define DDLC?
Ans. DDLC refers to Database Development Life Cycle. The DDLC is the set of
activities that are carried out to develop and implement databases.
Q.5 What is ER Model?
Ans. The ER model or Entity-Relationship model is a high level, conceptual
model that describes data as entities, attributes and relationships.
Q.6 Define Entity, attribute and relationship?
Ans. An Entity is an object that exists and is distinguishable from other
objects.
An Attribute is a property of an entity.
A Relationship is an association among several entities.