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Q:

If super class ref is pointing sub class object then by using super class ref is it possible to call sub class newly defined method?

Answer

yes if the method is ovreriding method


no if the method is not overriding method

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Subject: Java

Q:

What is the use of super call?

Answer

By using super call we can call super class constructors  from sub class constructors and we can initialize super class private data.

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Subject: Java

Q:

How to call argument constructor?

Answer

new ClassName( arg1, arg2, .... argN);


Ex:


Class sample {


   Sample(int a) {


   System.out.println("arg con a =" +a);


   }


}


class Demo {


    Public static void main( String[] args) {


     Sample s1= new Sample(23);


     Sample s2= new Sample(45);


    }


}

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Subject: Java

Q:

Why static method can not call non static method of the same class?

Answer

bcoz the static method does not contains the 'this' reference.

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Subject: Java

Q:

Which river of India is called Vridha Ganga?

A) Krishna B) Godavari
C) Kaveri D) Narmada
 
Answer & Explanation Answer: B) Godavari

Explanation:

Godavari, India's second longest river after the river Ganga and is one among the peninsular rivers.

 

 Which_river_of_India_is_called_Vridha_Ganga1545973278.jpg image

 

The river Godavari is often referred to as Vridha Ganga because of its large size and extent among the peninsular rivers.

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Filed Under: Indian Geography
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Q:

Who calls the main function of app during the app launch cycle?

Answer

During app launching, the system creates a main thread for the app and calls the app’s main function on that main thread. The Xcode project's default main function hands over control to the UIKit framework, which takes care of initializing the app before it is run.

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Subject: IOS

Q:

How can we call DDL statements like CREATE, DROP, TRUNCATE, etc. from PL/SQL?

Answer

EXECUTE IMMEDIATE command can be used to call DDL statements. 


Example:


BEGIN


EXECUTE IMMEDIATE  'TRUNCATE TABLE employee';


END;

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Subject: Oracle

Q:

Why many companies are switching their current business language to PHP? Where PHP basically used?

Answer

PHP is rapidly gaining the popularity and many companies are switching their current language for this language. PHP is a server side scripting language. PHP executes the instructions on the server itself. Server is a computer where the web site is located. PHP is used to create dynamic pages and provides faster execution of the instructions.

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Subject: PHP