System Analysis and Design
411. Objects are
- tangible entities
- intangible entities
- transient entities
- uniquely identifiable
- i, ii
- i, ii, iii
- i, ii, iii, iv
- i, ii, iv
Correct answer: (D)
i, ii, iv
412. Attributes are assigned value
- when operations are performed on an object
- when instances of objects are defined
- when methods are invoked
- when classes are identified
Correct answer: (B)
when instances of objects are defined
413. By abstraction in object-oriented modelling we mean picking
- only attributes appropriate to model an object
- only operations
- both operation and attributes with operations appropriate to model an object
- the appropriate abstract data type
Correct answer: (C)
both operation and attributes with operations appropriate to model an object
414. When a subclass is created using inheritance the resulting class
- may have only attributes of parent class
- may have only operations of parent class
- may have new operations only in addition to those in parent class
- may have new attributes and new operations in addition to those of the parent class
Correct answer: (D)
may have new attributes and new operations in addition to those of the parent class
415. An object is considered an external entity in object-oriented modelling if
- its attributes are invariant during operation of the system
- its attributes change during operation of the system
- it has numerous attributes
- it has no attributes relevant to the system
Correct answer: (A)
its attributes are invariant during operation of the system
416. In CRC based design a CRC team consists of
- one or two user’s representatives
- several programmers
- project coordinators
- one or two system analysts
- i, ii
- i, iii
- i, iii, iv
- i, ii, iii, iv
Correct answer: (C)
i, iii, iv
417. A subsystem of a complex system must
- know how other subsystems perform their task
- know what tasks other subsystems perform
- know what task it performs and other subsystems perform to access its data
- know how to send requests to other systems for getting tasks done by them
- i, ii
- ii, iii
- ii, iv
- iii, iv
Correct answer: (C)
ii, iv
418. A class is
- a group of objects
- template for objects of a particular type
- a class of objects
- a classification of objects
Correct answer: (B)
template for objects of a particular type
419. The following are intangible entities which can be defined as objects
- a motor car
- a bank account
- an aircraft
- a linked list
- i, ii
- ii, iv
- iii, iv
- ii, iii, iv
Correct answer: (B)
ii, iv
420. Inheritance in object-oriented system is used to
- create new classes from existing classes
- add new operations to existing operations
- add new attributes to existing attributes
- add new states to existing states
Correct answer: (A)
create new classes from existing classes