By Mughal K. A., Rasmussen R.
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8 Variable a is not declared. Variable b is not declared. Variable a is declared but not initialized. Variable b is declared but not initialized. Variable b is initialized but not declared. In which of these variable declarations will the variable remain uninitialized unless explicitly initialized? Select all valid answers. (a) (b) (c) (d) (e) Declaration of an instance variable of type int. Declaration of a static class variable of type float. Declaration of a local variable of type float. Declaration of a static class variable of type Object.
Select the one right answer. 3 new and delete are keywords in the Java language. try, catch and thrown are keywords in the Java language. static, unsigned and long are keywords in the Java language. exit, class and while are keywords in the Java language. return, goto and default are keywords in the Java language. for, while and next are keywords in the Java language. Is this a complete and legal comment? /* // */ Select the one right answer. (a) No, the block comment (/* ... ) comments out the closing part.
These comments are for documentation purposes and are ignored by the compiler. Java provides three types of comments to document a program: • A single-line comment • A multiple-line comment • A documentation (or Javadoc) comment Regardless of the type of comment, they cannot be nested. The comment-start sequences (//, /*, /**) are not treated differently from other characters when occurring within comments. Single-line Comment All characters after the comment-start sequence // through to the end of the line constitute a single-line comment.