Are you prepared in attending an interview? Then do not worry, we’ve a right answer for your job interview preparation. If you are preparing for Java Constructor job interview and don’t know how to crack interview and what level or difficulty of questions to be asked in job interviews then go through Wisdomjobs Java Constructor interview questions and answers page to crack your job interview. Constructors are used to initialize the object's state. Like methods, a constructor also contains collection of statements that are executed at time of Object creation. A constructor resembles an instance method in java but it's not a method. Below is the list of frequently asked Java Constructor interview questions and answers which gets you ready to face the interviews:
It should not contain Non Access Modifiers:
It can have all four accessibility modifiers:
It can have throws clause:
Yes, it is allowed to define a method with same class name. No compile time error and no runtime error is raised, but it is not recommended as per coding standards.
No, because compiler and JVM considers it as a method.
By using return type , if there is a return type it is considered as a method else it is considered as constructor.
By using new keyword, if new keyword is used in calling then constructor is executed else method is executed.
As there is a possibility to define a method with same class name , return type is not allowed to constructor to differentiate constructor block from method block.
No, it is optional . If we do not define a constructor compiler will define a default constructor.
Because it obtain all its default properties from its class.
It is assigned from its class.
Only if there is no explicit constructor defined by developer.
If we want do execute some logic at the time of object creation, that logic may be object initialization logic or some other useful logic.
No. compiler places default constructor only if there is no explicit constructor.
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An Introduction To Java
The Java Programming Environment
Fundamental Programming Structures In Java
Objects And Classes
Interfaces And Inner Classes
User Interface Components With Swing
Deploying Applications And Applets
Exceptions, Logging, Assertions, And Debugging
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