Write a brief history of steganography.
What will be an ideal response?
ANSWER: Steganography has been used since ancient times. Greek rulers used this technique to send covert messages to diplomats and troops via messengers. To hide messages, rulers shaved their messengers’ heads and tattooed messages on their scalps. After the messengers's hair grew enough to cover the message, they left for their destinations, where they shaved their heads so that recipients could read the message. This method was a clever way to send and retrieve encrypted information, but it was inefficient because the messengers’ hair took a long time to grow back, and only a limited amount of space was available to write messages. However, it enabled the Greeks to send secret messages until their enemies discovered this early form of steganography and began intercepting messengers.
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Write an application that calculates the amount of money in an account after 10 years for interest rates of 5%–10%, inclu- sive (Fig. 10.29). For this application, users must provide the initial principal.
) Copying the template to your working directory. Copy the C:Exam- plesTutorial10 ExercisesComparingRates directory to your C:SimplyJava directory.
b) Opening the template file. Open the ComparingRates.java file in your text editor. c) Customizing the JTextArea. You must customize the JTextArea to display the rate
and amount after 10 years. The name of this JTextArea is resultJTextArea. In line
58, insert code to set the bounds property to 20, 85, 260, 120. In line 59, insert code to set resultJTextArea’s editable property to false.
d) Completing a for statement header. In line 98, you will see a for statement header with only two semicolons. Before the first semicolon, declare and initialize variable rate (which will be used as our counter) to 5. Before the second semicolon, enter a loop-continuation condition that will cause the for statement to loop until the counter has reached 10. After the second semicolon, enter the increment of the
counter so that
____________________ refers to the intensity of the color: how close it is to a pure hue.
Fill in the blank(s) with the appropriate word(s).
The COUNTIFS function allows for multiple criteria in multiple ranges to be evaluated and counted
Indicate whether the statement is true or false.
The operation of removing an item from a queue is formally referred to as serving.
Answer the following statement true (T) or false (F)