Question

1-To create an ArrayList of strings, which of the following is correct?

`a	ArrayList<String> list = new ArrayList<String>();
b	ArrayList<String> list = new String<String>​[];
c	ArrayList<String> list = new ArrayList<String>;
d	ArrayList​[String] list = new ArrayList​[String];

2-All instance variables?

a	Are assigned a default value if they are not initialized
b	Must be initialized as part of their declaration
c	Are assigned an arbitrary value if they are not initialized
d	Must be initialized by the constructor

3-An instance method may only be invoked on

a	An instance variable
b	A constructor
c	A class
d	An object

4-Each object contains its own copy of

a	Constructors
b	Constructors, methods, and variables
c	Instance variables
d	Instance methods

Please provide a correct answer..

Note that the questions are about java.

Answer 1

Ans1) Correct Option :- A ArrayList<String> list = new ArrayList<String>();

Explanation :- As it is the correct syntax to create the array list.

Ans2) Correct Option : A  Are assigned a default value if they are not initialized

Explanation :- Since, instance variable have default value. For numbers, the default value is 0, for booleans it is False, and for object references it is null.

Ans3) Correct Option : D An object

Explanation :- To call a instance method, we have to create an Object of the class within which it defined.

Ans4) Correct Option : B Constructors, methods, and variables

Explanation :- Since, each object is blue print of the class.