Describe how to hide information on an 8-bit bitmap image file using substitution steganography.
What will be an ideal response?
ANSWER: For example, if you use an 8-bit graphics file, each pixel is represented by 8 bits of data containing information about the color each pixel displays onscreen. The bits are prioritized from left to right, such as 11101100. The first bit on the left is the most significant bit (MSB), and the last bit on the right is the least significant bit (LSB). As the names suggest, changing the MSB affects the pixel display more than changing the LSB does. Furthermore, you can usually change only the last two LSBs in an image without producing a noticeable change in the shade of color the pixel displays.
For example, if your secret message is converted to binary form to equal 01101100 and you want to embed this secret message into a picture, you alter the last 2bits of four pixels. You break the binary form into sections of two, as in 01 10 11 00, and insert the bits into the last 2 bits of each pixel.
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If you are accessing each of the elements of a two dimensional array with 6 rows and 15 columns, which of the following would be a possible correct loop header(s)?
a) for (int r = 0; r < 5; r++) for (int c = 0; c < 14; c++) b) for (int r = 0; r <= 6; r++) for (int c = 0; c <=15; c++) c) for (int r = 0; r < 6; r++) for (int c = 0; c < 15; c++) d) for (int r = 0; r < 90; r++)
A(n) ________ consists of a series of audio or video content that are distributed over the Internet
Fill in the blank(s) with correct word
What is Directory?
What will be an ideal response?
Which of the following statements is false?
a. Interface IntPredicate’s default method and performs a logical AND operation with short-circuit evaluation between the IntPredicate on which it’s called and its IntPredicate argument. b. Interface IntPredicate’s default method invert reverses the boolean value of the IntPredicate on which it’s called. c. Interface IntPredicate default method or performs a logical OR operation with short-circuit evaluation between the IntPredicate on which it’s called and its IntPredicate argument. d. You can use the interface IntPredicate default methods to compose more complex conditions.