When you define a Java class using an identifier, what are the requirements you need to know?
What will be an ideal response?
You can define a Java class using any name or identifier you need, as long as it meets the following requirements:A Java identifier must begin with a letter of the English alphabet, a non-English letter (such as ? or ?), an underscore, or a dollar sign. A class name cannot begin with a digit.A Java identifier can contain only letters, digits, underscores, or dollar signs.A Java identifier cannot be a reserved keyword, such as public or class.A Java identifier cannot be one of the following values: true, false, or null. These are not keywords (they are primitive values), but they are reserved and cannot be used.
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What exception type does the following program throw?
``` public class Test { public static void main(String[] args) { Object o = null; System.out.println(o.toString()); } }``` a. ArithmeticException b. ArrayIndexOutOfBoundsException c. StringIndexOutOfBoundsException d. ClassCastException e. NullPointerException
What does the book recommend for HSL in unsupported browsers?
a. Do nothing and let page look fairly different in these versions. b. Specify colors with hexadecimal or RGB. c. Provide fallback color declaration. d. Mimic alpha transparency with proprietary IE CSS declarations. e. All of the above. f. None of the above.
A graphic representation of numeric data is called a(n) ________
Fill in the blank(s) with correct word
When an attacker promotes themselves as reputable third-party advertisers to distribute their malware through the Web ads, what type attack is being performed?
A. ad squatting B. clickjacking C. malvertising D. ad spoofing