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Core Java - Interview Questions and Answers for 'Argument' - 3 question(s) found - Order By Newest

 Q1. Is this a valid initialization ? Explain.

Collection<Collection> collection = new LinkedList<LinkedList>();
Core Java2017-07-23 18:25:34

Ans. No. It will result in a type mismatch error.

Collection<Collection> collection = new LinkedList<Collection>();

is a valid initialization as collection being reference of "Collection" class can hold object of derived Class "LinkedList" due to runtime Polymorphism. Runtime polymorphism is not applicable to type arguments.

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   Like         Discuss         Correct / Improve     generics  type argument


Related Questions



 Q2. Difference between parameters and arguments ?Core Java
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Ans. Parameters are the variables that the method is expected to receive along with the method call. Arguments are the values which are passed on while calling the methods.

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   Like         Discuss         Correct / Improve     parameter   argument  method   function  java      basic


Related Questions

 Which of the following are valid declarations

1. void method(int... x){};
2. void method(int.. x){};
3. void method(int.. .x){};
4. void method(int ...x){};
5. void method(int... x){};
6. void method(int ... x){};
7. void method(int x, int... y){};
8. void method(int... x, int y){};
9. void method(int... x,int... y){};
 What is the difference between these two method declarations ?

private static void method(String[] arg)

and

private static void method(String... arg)
  Which function is used to convert a JSON text into an object ?
 Can we overload method as following ?

void method(int... x){};
void method(int[] x){};
 What would you do if you see an error thrown by a lambda function as "Access Denied" while doing something with S3 ?
  Which kind of memory is used for storing object member variables and function local variables ?
  If you have access to a function that returns a random integer from one to five, write another function which returns a random integer from one to seven.
  What is the @FunctionalInterface annotation ?
  What is the input to the Reduce function ?


 Q3. Why do we pass an array of strings to main method ?Core Java2017-06-23 12:58:05

Ans. Array of strings in the main method are the list of arguments or parameters which are sent to the application / program.

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   Like         Discuss         Correct / Improve     main method   main method string array argument


Related Questions

  Why do we write public static void main ? Can we use some other syntax too for main ?
 Which of the following is false about main method ?

a. It should be declared public and static
b. it should have only 1 argument of type String array
c. We can override main method
d. We can overload main method
 Can we have multiple main methods in a single class ?
  Can we overload main method in Java ?
  What will happen if static modifier is removed from the signature of the main method?
  How can we execute a Java class independently if it doesn't have a static main method ?
 Can we declare a main method as abstract ?
 Do all java classes need a main method?
 Can we declare the main method as private ?
 Why main method is declared static ?



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