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Which of the following is true about abstract classes?

• Abstract class can have both abstract and non-abstract methods

• ) Abstract class can be instantiated directly

• Abstract class cannot have constructors

• Abstract class must contain only abstract methods

What happens if you try to override a method in Java with a lower access modifier (e.g., protected → private)?

• Works fine

• Compile-time error

• Runtime error

• ignored

Which of the following statements about static blocks in Java is correct?

• A class can have only one static block

• Static blocks execute only when objects are created

• Static blocks execute before the main method

• Static blocks cannot modify static variables

Which of the following is true about method overloading in Java?

• Methods must have different names

• Methods must have different return types

• Methods must have different parameter lists

• Methods must belong to different classes

class A{

A(){System.out.println("Constructor A");}

}

class B extends A{

B(){System.out.println("Constructor B");}

}

class C extends B{

C(){System.out.println("Constructor C");}

public static void main(String args[]){

new C();

}

}

• Constructor A

  Constructor B

  Constructor C

• Constructor A

  Constructor C

  Constructor B

• Constructor A

  Constructor B

• Constructor C

  Constructor B