Faculty of Computers and Information
Mansoura - Universtiy
Questions for Chapter3 DR / Mohamed Mahfouz
prepared by
Eng :- Ahmed Eldeep
Combination of message and data
Combination of namespace
Combination of task to be performed
Combination of Array
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True
False
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. A void area in memory is returned so that you can populate it.
No data type is returned
Void is not a valid data type
None of the above
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Encapsulation
Inheritance
Polymorphism
All of the above
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. An action or occurrence such as click
. A package of one or more components together
. A set of statement that performs specific task
. A reference type variable
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It permits code reusability. Reusability saves time in program development.
It encourages the reuse of proven and debugged high-quality software, thus reducing problem after a system becomes functional
Both A & B
Only A
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Method Overloading
Method Invocating
Method Overriding
Method Labeling
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Class
Inheritance
Polymorphism
Aggregation
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Coupling objects together more tightly
. Enabling a number of different operations to share the same name
Making objects more dependent on one another
Removing the barriers imposed by encapsulation.
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Class
Interface
Object
Exception
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Assignment can be done as many times as desired whereas initialization can be done only once.
Assignment can be done only once whereas initialization can be done as many times as desired
. Both are same
None of the above
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True
False
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True
False
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False
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Class defined inside a method without a name
It is instantiated and declared in the same place and cannot have explicit constructors
Both A & B
Only A
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An Object is an instance of a class
Objects can access both instance and static data
All classes extend the Object class
Objects do not permit encapsulation
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Only those defined in the same class.
Only static methods in the same class.
Only instance methods in the same class.
Only classes in the same package.
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True
False
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Classes defined in other classes
Classes defined in methods
Both A & B
Only A
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False
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An abstract representation of something with certain properties .
. A concrete representation of something with certain properties .
. An abstract representation of something with certain properties and abilities.
A concrete representation of something with certain properties and abilities.
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An object instance that has only static methods.
An object instance that has only primitive attributes.
An object instance that contains other objects.
An object that has only primitive attributes and instances methods.
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Steering wheel of the car
Car
Color of the car
Music system of the car
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False
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Car and seat covers
Car and music system
Car and color
Car and engine
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True
False
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Makes programs more reliable.
Simulates real life.
Uses a lot of intimidating vocabulary, which is not as bad as it sounds.
Is all of the above.
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