Answer:
Option (4) is the correct answer.
Explanation:
In Java programming language ,array collection starts from 0 index location and ends in a size-1 index location. So to access the last elements the user needs to use a[Size-1] statement. so to modify the value of the last location of the array the user needs to use "a[size-1]= element;".
But when the user wants to add some new value to the end of the array list collection then he needs to use the statement--
a.add(element); //where add is a function, element is a value and a is a array list object.
Another option is invalid because--
- Option 1 is not the correct because "a[3]=element;" modify the value of the 3rd element of the array.
- Option 2 gives a compile-time error because add functions bracts are not closed.
- Option 3 gives the error because a[4] gives the location of the 5th element of the array but the above question says that a is defined with 4 elements.
Answer:
Option D: If it is the month of January, then the temperature is cool.
Explanation:
A conditional statement is the one having an if condition in it that says, if the condition is true proceed to the next statement, else not.
Given statements are:
- If it is the month of January, then it is winter.
This can be written as: if (January)⇒Winter
- If it is winter, then the temperature is cool.
This can be written as: if (winter)⇒ Temperature(cool)
So by combining both the statements, the winter clause will be connected and we get:
if(January)⇒Temperature (cool)
This can be written as:
- If it is the month of January, then the temperature is cool.
So, Option D is the correct answer.
i hope it will help you!
Answer:
Explanation:
1. The answer is No, interface cannot have constructors. ... In order to call any method we need an object since there is no need to have object of interface, there is no need of having constructor in interface (Constructor is being called during creation of object).
2.A final class is considered complete and can not be subclassed (It's methods can not be overridden ). In case of abstract class, we have to proved implementation to abstract methods in subclasses. A final class can not have abstract methods and an abstract class can not be declared final.
3.private constructors are acceptable, however the class should be marked final instead, as doing so means the class is to be extended.
4.Yes! Abstract classes can have constructors! Yes, when we define a class to be an Abstract Class it cannot be instantiated(i.e an object cannot be created) but that does not mean an Abstract class cannot have a constructor. Each abstract class must have a concrete subclass which will implement the abstract methods of that abstract class.
The answer is the US Secretary of State. <span>At the time of signing,Secretary of State was the title of the man (John Hay) who is the first of the two names in the name of the 1901 treaty that nullified the Clayton-Bulwer Treaty. </span>It was signed by US Secretary of State John Hay and British Ambassador to the United States Lord Pauncefote on the 18th of November 1901.
