Please answer all of the questions the questions are asking about java programs

Question

Please answer all of the questions the questions are asking about java programs in this instance.

1. An array is a group of variables, and it can only take the same type values (True/False).

2.The elements of an array can be primitive types, but not reference types(True/False).

3. An index of an array must be int value or a byte, short, or char type value(True/False).

4.

Question: what’s the difference between

int[ ] a, b, c; and int a[ ], b, c; ?

5. What’s the difference between byte-based streams and character-based streams (binary

file and text file)?

6. Two ways to pass arguments in method calls in many programming languages are call-by-value and call-by-reference.When a method modifies a primitive-type parameter, changes to the parameter have no effect on the original argument value in the calling method. (True/False)

7.When a method modifies a reference-type parameter, changes to the parameter will also change the original argument value in the calling method. (True/False)

Explanation / Answer

1. True

Because array is a collection of same type of data types

2.False

An element of an array can be either primitive or refernce

3. True

Arrays must be indexed by int values ,short ,byte ,char values may also be used as index

4. There is no differnce. In both the cases a is an array and b,c are integer variables.

An array can be declared as data type arr[] or datatype [] arr

5.Streams that input and output bytes to files are known as Byte base streams.

Streams that input and output characters to files are known as Character based streams

6.True

Because When a method modifies a primitive type parameter changes to the parameter have no effect on original argument

7.True

Because when a method modifies refernce type parameter changes to the parameter will change the original argument

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