Download PDF by Mughal K. A., Rasmussen R.: A Programmer's Guide to Java Certification: A Comprehensive

By Mughal K. A., Rasmussen R.

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For each primitive datatype there is a corresponding wrapper class to represent the values of the primitive datatype as an object. These wrapper classes also define useful methods for manipulating both primitive data values and objects. 3. Number class, as are the wrapper classes for floating-point numbers (Float, Double). 4 Which of the following does not denote a primitive data value in Java? Select all valid answers. 5 Which of the following lines are valid declarations? Select all valid answers.

Comments out the closing part. (b) It is a completely valid comment. The // part is ignored by the compiler. (c) This combination of comments is illegal and the compiler will reject it. 1 gives an overview of the primitive datatypes in Java. Primitive datatypes in Java can be divided into three main categories: • Integral types consisting of integers and characters: Integer datatypes are byte, short, int and long. They represent signed integers. The character datatype is represented by the char type.

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. (b) It is a completely valid comment.

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A Programmer's Guide to Java Certification: A Comprehensive Primer by Mughal K. A., Rasmussen R.


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