Deck 8: Recovering Graphics Files

Question 1

​How many bits are required to create a pixel capable of displaying 65,536 different colors?

A)​8 bits
B)​16 bits
C)32 bits
D)64 bits

Answer 1

B

Question 2

Graphics files are created and saved in a graphics editor, such as Microsoft Paint, Adobe Freehand MX, Adobe Photoshop, or Gnome GIMP.​

Answer 2

True

Question 3

The Lempel-Ziv-Welch (LZW) algorithm is used in _____________ compression.​

A)​lossy
B)​lossless
C)vector quantization
D)adaptive

Answer 3

B

Question 4

​For EXIF JPEG files, the hexadecimal value starting at offset 2 is _____________.

A)​FFE0
B)​FFE1
C)FFD8
D)FFD9

Question 5

​The _____________ format is a proprietary format used by Adobe Photoshop.

A).tga
B)​.fh11
C).svg
D).psd

Question 6

In simple terms, _____________ compression ​discards bits in much the same way rounding off decimal values discards numbers.

A)​Huffman
B)​Lempel-Ziv-Welch (LZW)
C)Vector Quantization
D)Adaptive Quantization

Question 7

​What format was developed as a standard for storing metadata in image files?

A)​jpeg
B)​tif
C)exif
D)bitmap

Question 8

What act defines precisely how copyright laws pertain to graphics?

A)​1988 Image Ownership Act
B)​1976 Copyright Act
C)1923 Patented Image Act
D)1976 Computer Fraud and Abuse Act

Question 9

Select below the utility that is not a lossless compression utility:​

A)​PKZip
B)​WinZip
C)StuffIt
D)Lzip

Question 10

Each graphics file type has a unique header value.​

Question 11

Most digital cameras use the bitmap format to store photos.​

Question 12

Which of the following is not considered to be a non-standard graphics file format?​

A)​.dxf
B)​.tga
C).rtl
D).psd

Question 13

When you decompress ​data that uses a lossy compression algorithm, you regain data lost by compression.

Question 14

The first 3 bytes of an XIF file are exactly the same as a TIF file.​

Question 15

What kind of graphics file combines bitmap and vector graphics types?​

A)​metafile
B)​bitmap
C)jpeg
D)tif

Question 16

When looking at a byte of information in binary, such as 11101100, what is the first bit on the left referred to as?​

A)​major significant bit (MSB)
B)least significant bit (LSB)
C)most significant bit (MSB)
D)leading significant bit (LSB)

Question 17

Which graphics file format below is rarely compressed?

A)​GIF
B)​JPEG
C)BMP
D)None of the above

Question 18

All TIF files start at offset 0 with what 6 hexadecimal characters?​

A)​2A 49 48
B)​FF 26 9B
C)49 49 2A
D)AC 49 2A

Question 19

How many different colors can be displayed by a 24 bit colored pixel?​

A)​256
B)​65,536
C)16,777,216
D)4,294,967,296

Question 20

Referred to as a digital negative, the _______ is typically used on many higher-end digital cameras.​

A)​raster file format
B)​bitmap file format
C)jpeg file format
D)raw file format

Question 21

Which of the following is not a type of graphic file that is created by a graphics program?​

A)bitmap images
B)​vector graphics
C)metafile graphics
D)raster graphics

Question 22

Match each term with the correct definition below:

-?Graphics files that are combinations of bitmap and vector images.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 23

Match each term with the correct definition below:

-?A file format the Japan Electronics and Informatuin Technology Industries Association (JEITA) developed as a standard for storing metadata in JPEG or TIF files.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 24

Match each term with the correct definition below:

-?A form of compression that uses an algorithm similar to rounding off decimal values to eliminate unnecessary bits of data.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 25

Match each term with the correct definition below:

-?The results of keyword searches that contain the correct match but aren't relevant to the investigation.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 26

Match each term with the correct definition below:

-?The process of converting raw picture data to another fornat, such as JPEG or TIF.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 27

Bitmap images store graphics information as grids of _________, short for "picture elements."

Question 28

A standard JFIF JPEG file has a header value of __________________ from offset 0 and the label name JFIF starting at offset 6.

Question 29

Match each term with the correct definition below:

-?Less common graphic file formats, including proprietary formats, newer formats, formats that most image viewers don't recognize, and old or obsolete formats.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 30

For all JPEG files, the ending hexadecimal marker, also known as the end of image (EOI), is ____________.?

A)?FFE0
B)?FFD8
C)FFD9
D)FFFF

Question 31

The ______________ is the best source for learning more about file formats and their extensions.​

Question 32

?ProDiscover adds a ____________ extension automatically on all copied clusters the Recover Clusters function exports.

Question 33

Match each term with the correct definition below:

-?Collection of dots, or pixels, in a grid format that form a graphic.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 34

Match each term with the correct definition below:

-?The process of recovering file fragments that are scattered across a disk.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 35

Match each term with the correct definition below:

-Graohics based on mathematicsl instructions to form lines, curves, text, and other geometrical shapes.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 36

What file type starts at offset 0 with a hexidecimal value of FFD8?​

A)​tiff
B)​jpeg
C)xdg
D)bmp

Question 37

The process of converting raw picture data to another format is called _________________.​

A)​splicing
B)​carving
C)demosaicing
D)vector quantization

Question 38

Match each term with the correct definition below:

-?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.

A)bitmap images
B)carving
C)demosaicing
D)Exchangeable Image File (ExIF)
E)false positives
F)metafile graphics
G)nonstandard graphics file formats
H)raster images
I)vector graphics
J)vector quantization (VQ)

Question 39

What is the biggest disadvantage of the raw file format?

Question 40

​Which of the following formats is not considered to be a standard graphics file format?

A)​gif
B)​jpeg
C)dxf
D)tga

Question 41

Describe the two major forms of steganography.

Question 42

Why should date and time for a file be considered subjective evidence?​

Question 43

List the standard bitmap graphics file formats.​

Question 44

When using steganography to hide messages, why is it better to change the least significant bits of an image, and how is this detected?

Question 45

How do vector graphics differ from bitmap and raster images?

Question 46

Explain the difference between bitmap and raster images.​

Question 47

What can investigators learn using Exif format metadata, and how is this data accessed?

Question 48

Describe the difference between lossy compression and lossless compression.

Question 49

​
What is a digital watermark, and how is it used?​