3.In Java, ________ must be declared before they can be used Variables Literals

Question

3.In Java, ________ must be declared before they can be used

Variables

Literals

Key words

Comments

If x has been declared an int, which of the following statements is invalid?

x = 0;

x = -58932;

x = 1,000;

x = 592;

A ragged array is

A two-dimensional array for which the number of rows is unknown.

A one-dimensional array for which the number of elements is unknown.

A two-dimensional array where the rows are of different lengths.

There is no such thing as a ragged array.

Encapsulation refers to the combining of data and code into a single object

True or false

Explanation / Answer

3.In Java, ________ must be declared before they can be used
   1.Variables
   2.Literals
   3.Key words
   4.Comments
Ans: 1.Variables
  
If x has been declared an int, which of the following statements is invalid?
   1.x = 0;
   2.x = -58932;
   3.x = 1,000;
   4.x = 592;
Ans:
   2.x = -58932;
A ragged array is
   1.A two-dimensional array for which the number of rows is unknown.
   2.A one-dimensional array for which the number of elements is unknown.
   3.A two-dimensional array where the rows are of different lengths.
   4.There is no such thing as a ragged array.
Ans:
   3.A two-dimensional array where the rows are of different lengths.
Encapsulation refers to the combining of data and code into a single object
True or false
  
Ans: True

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