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Revature Study Guide 2024/25 latest guide(graded A+).
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Revature Study Guide 2024/25 latest guide(graded A+).
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Revature StudyGuide 2024/25
latest
guide(graded
A+)
Object - answer an instance of a class; it has
state and behavior
OOPs vs Procedure Oriented Programming -
answer Development and maintenance is
easier with OOPs because it scales with the
project
OOPs provides data hiding
,Constructor - answer A special type of
method that is called when an instance of the
object is created; it is used to initialize the
object.
Constructor Rules - answer 1. constructor
name must be the same as the class name
2. constructor must have no explicit return
type
3. Java Constructor cannot be abstract,
static, final, and synchronized
default constructor - answer A no-argument
constructor automatically provided by Java
for classes that do not have any
constructors; contains a default call to super(
)
parameterized constructor - answer A
constructor that accepts arguments. Used to
provide different values to distinct objects.
Constructor Overloading - answer defining
multiple versions of a constructor for a single
, object, which are distinguished from each
other by the type and number of parameters
Constructor vs Method - answer Constructor:
- used to initialize the state of an object
- must not have a return type
- invoked implicitly
- Java Compiler provides a default
constructor if you do not provide one
- constructor name must be the same as the
class name
Method:
- used to expose the behavior of an object
- must have a return type
- invoked explicitly
- not provided by the compiler in any case
- method name may or may not be the same
as class name
4 OOP Pillars - answer Inheritance
Polymorphism
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