Problem 1) For each of the following sentences, indicate whether it is a language rule that...

Problem 1) For each of the following sentences, indicate whether it is a language rule that is enforced by the Java compiler or a convention (that is, not enforced by the Java compiler but most programmers follow it).

(a) Variable names must begin with a lower-case letter.
(b) The name of a class must match the name of the file containing it.
(c) All variables must be declared.
(d) There must be a space before and after each operator.
(e) All lines after a left curly brace must be indented.
(f) Class names must begin with an upper-case letter.
(g) Every program must begin with comments describing the author of the program and what the program does.

Expert Solution

(a) Variable names must begin with a lower-case letter.
In java, variable names must start with lowercase letter,
and first letter of next(second,...) words must be in capital case.
This is the java naming convention rule..

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(b) The name of a class must match the name of the file containing it.
In java, name of the class should be match with file name,
because of .class file generation.

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c) All variables must be declared
In java, we can not use variables before declaration,
it means variable should decalred first and then it should be used in program,
otherwise java compiler throws error.

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(d) There must be a space before and after each operator.
This is not a java rule.
If we are not giving space before and after operator then also java code compiles successful.

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(e) All lines after a left curly brace must be indented.
This is not a java rule.
Indentation in code is the recomendation for better understanding of code,
but this is not compulsory in java.

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(f) Class names must begin with an upper-case letter
This is again java naming convention rule that
class name should be start with upper case letter.

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(g) Every program must begin with comments
describing the author of the program and what the program does
It is recomended..Not compulsory

venereology answered 1 hour ago

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