Computer Forensics Chapter 8 Graphics

24 July 2022
4.7 (114 reviews)
44 test answers

Unlock all answers in this set

Unlock answers (40)
question
16 bits
answer
How many bits are required to create a pixel capable of displaying 65,536 different colors?
question
.dxf
answer
Which of the following is not considered to be a non-standard graphics file format?
question
49 49 2A
answer
All TIF files start at offset 0 with what 6 hexadecimal characters?
question
metafile
answer
What kind of graphics file combines bitmap and vector graphics types?
question
demosaicing
answer
The process of converting raw picture data to another format is called _________________.
question
exif
answer
What format was developed as a standard for storing metadata in image files?
question
tga
answer
Which of the following formats is not considered to be a standard graphics file format?
question
Lzip
answer
Select below the utility that is not a lossless compression utility:
question
Vector Quantization
answer
In simple terms, _____________ compression discards bits in much the same way rounding off decimal values discards numbers
question
jpeg
answer
What file type starts at offset 0 with a hexidecimal value of FFD8?
question
16,777,216
answer
How many different colors can be displayed by a 24 bit colored pixel?
question
.psd
answer
The _____________ format is a proprietary format used by Adobe Photoshop.
question
FFE1
answer
For EXIF JPEG files, the hexadecimal value starting at offset 2 is _____________.
question
raw file format
answer
Referred to as a digital negative, the _______ is typically used on many higher-end digital cameras.
question
lossless
answer
The Lempel-Ziv-Welch (LZW) algorithm is used in _____________ compression
question
FFD9
answer
For all JPEG files, the ending hexadecimal marker, also known as the end of image (EOI), is ____________.
question
BMP
answer
Which graphics file format below is rarely compressed?
question
most significant bit (MSB)
answer
When looking at a byte of information in binary, such as 11101100, what is the first bit on the left referred to as?
question
1976 Copyright Act
answer
What act defines precisely how copyright laws pertain to graphics?
question
raster graphics
answer
Which of the following is not a type of graphic file that is created by a graphics program?
question
internet
answer
The __________ is the best source for learning more about file formats and their extensions.
question
FF D8 FF E0
answer
A standard JFIF JPEG file has a header value of _________ from offset 0 and the label name JFIF starting at offset 6.
question
pixels
answer
Bitmap images store graphics information as grids of __________, short for "picture elements.
question
.txt
answer
ProDiscover adds a ________ extension automatically on all copied clusters the Recover Clusters function exports.
question
XIF
answer
The _______ format is an image format produced by the Nuance PaperPort scanning program.
question
Insertion
answer
placing data from a secret file into a host file.
question
Substitution
answer
replaces bits of a host file with other bits of data.
question
Lossless compression
answer
Reduces the file size without removing data.
question
Lossy compression
answer
Permanently discards bits of information in the file to compress it.
question
True
answer
The first 3 bytes of an XIF file are exactly the same as a TIF file.
question
True
answer
Graphics files are created and saved in a graphics editor, such as Microsoft Paint, Adobe Freehand MX, Adobe Photoshop, or Gnome GIMP.
question
False
answer
Most digital cameras use the bitmap format to store photos.
question
False
answer
When you decompress data that uses a lossy compression algorithm, you regain data lost by compression.
question
True
answer
Each graphics file type has a unique header value.
question
vector quantization (VQ)
answer
A form of compression that uses an algorithm similar to rounding off decimal values to eliminate unnecessary bits of data.
question
raster images
answer
Collections of pixels stored in rows rather than a grid, as with bitmap images, to make graphics easier to print; usually creates when a vector graphic is converted to a bitmap image.
question
vector graphics
answer
Graphics based on mathematics instructions to form lines, curves, text, and other geometrical shapes.
question
demosaicing
answer
The process of converting raw picture data to another format, such as JPEG or TIF.
question
bitmap images
answer
Collection of dots, or pixels, in a grid format that form a graphic.
question
nonstandard graphics file formats
answer
Less common graphic file formats, including proprietary formats, newer formats, formats that most image viewers don't recognize, and old or obsolete formats.
question
Exchangeable Image File (ExIF)
answer
A file format the Japan Electronics and Information Technology Industries Association (JEITA) developed as a standard for storing metadata in JPEG or TIF files.
question
false positives
answer
The results of keyword searches that contain the correct match but aren't relevant to the investigation.
question
metafile graphics
answer
Graphics files that are combinations of bitmap and vector images.
question
carving
answer
The process of recovering file fragments that are scattered across a disk.