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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
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)


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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