Description : Which of the following is a benefit of lossy compression over lossless? A. File sizes will always be reduced, even when compressed multiple times. B. File quality is not harmed, e.g. ... can be decompressed back to their original uncompressed form. D. File sizes are usually significantly smaller.
Last Answer : C. Files can be decompressed back to their original uncompressed form.
Description : Data compression which guarantees that all original data can be restored exactly A. Lossless compression B. Lossy compression C. File compression D. Raster compression
Last Answer : B. Lossy compression
Description : What type of compression actually deletes data and cannot be decompressed? A. File Compression B. Lossless Compression C. Lossy Compression D. Archive Compression
Last Answer : D. Archive Compression
Description : Dennis has saved a photograph and has lost data during compression. What type of compression has occurred? A. LOSSY B. LOSSLESS C. RESOLUTION D. COLOR MODE
Last Answer : A. LOSSY
Description : Which best describes Lossless Compression? A. No information is lost but file size is increased B. There is no loss in information at all after compression C. Files which have the exact same data after compression D. Compression that involves an algorithm
Last Answer : B. There is no loss in information at all after compression
Description : Lossy or lossless? This type of compression makes the file smaller A. Lossy B. Lossless
Last Answer : A. Lossy
Description : Lossy or lossless? This type of compression does not get rid of any data A. Lossy B. Lossless
Last Answer : B. Lossless
Description : Huffman coding is an encoding algorithm used for A. lossless data compression B. files greater than 1 Mbit C. broadband systems D. lossy data compression
Last Answer : A. lossless data compression
Description : Huffman coding is an encoding algorithm used for a. lossless data compression b. files greater than 1 Mbit c. broadband systems d. lossy data compression
Last Answer : a. lossless data compression
Description : The difference between the original and reconstructed data, which we will refer to as the ______in the reconstructed data. a. Redundancy b. Compression c. loss d. Distortion
Last Answer : d. Distortion
Description : Popular measures of distortion is a. Squared error measure b. Absolute difference c. Noise d. Nats
Last Answer : a. Squared error measure
Description : The rate for a discrete source is simply the______. a. Entropy b. Loss c. Noise d. Distortion
Last Answer : a. Entropy
Description : Represents one dot that is illuminated on a computer screen, many of which make up images A. Graphics B. Lossless C. Lossy D. Pixels
Last Answer : D. Pixels
Description : Anything on a page that is not actual text, from simple line drawings to fully active images found on the World Wide Web. A. Graphics B. Lossless C. Lossy D. Pixels
Last Answer : A. Graphics
Description : colors of the pixels in a digital image are often represented by red, green, and blue values between 0 and 255 (an RGB triplet). A photographer is manipulating a digital image ... using on the digital image? A. Lossless transformation B. Lossy transformation C. Multiband transformation
Last Answer : A. Lossless transformation
Description : A song is digitally recorded by an artist and saved to a file. Then, the artist runs a program that takes the file as input and produces a new file. The new file does not include any sound ... a smaller file size. D. This is a lossless transformation of data that results in a larger file size.
Last Answer : A. This is a lossy transformation of data that results in a smaller file size.
Description : The best visual compression quality is achieved using A. DCT B. Wavelets C. Dolby D. Fourier transform
Last Answer : B. Wavelets
Description : Without losing quality, JPEG-2000 can achieve compression ratios of A. 20:1 B. 2000:1 C. 2:1 D. 200:1
Last Answer : D. 200:1
Description : An Image is Square array of 256X256 pixel requires 65536 bytes, and after compression it reduced to 16384 X8 bytes. What will be the compression rate: a. 2 b. 3 c. 4 d. 5
Last Answer : a. 2
Description : Which of these is NOT a way to decrease image blurriness? A. Use compatible file formats B. Increase the size of thumbails C. Save images using loseless compression D. Check if raster or vector graphics work better
Last Answer : A. Use compatible file formats
Description : How does lossy compression reduce the size of files? A. Through removing redundancies by grouping repeated data together. B. By removing some precision in data that humans would have difficulty to ... the amount of storage needed. D. By replacing blocks of data with more compact representations.
Last Answer : D. By replacing blocks of data with more compact representations.
Description : Hamzah needs to email a large file to a classmate. Why might he need to use file compression to do so? A. Email services often only let you send compressed data files. B. Compressed files are ... . D. Email services often have maximum file sizes that prevent you sending files that are too large.
Last Answer : D. Email services often have maximum file sizes that prevent you sending files that are too large.
Description : A wave in which the wave’s medium is compressed in the same direction as the movement of the wave A. Transversal wave B. Transverse wave C. Frequency wave D. compression wave
Last Answer : C. Frequency wave
Description : A wave in which the movement of the wave’s medium is perpendicular to the movement of the wave traveling through the medium A. Transverse waves B. Compression waves C. Nodular Waves D. Ocean Waves
Last Answer : A. Transverse waves
Description : To save file space lossy compression... A. Temporarily removes data B. Permanently removes data
Last Answer : A. Temporarily removes data
Description : The act of changing the background color of a publication on which the image displays does not make the image look different. A. Color Depth B. Compression C. Portability D. Transparency
Last Answer : D. Transparency
Description : Which of the following is a true statement about data compression? A. Data compression techniques can be used to reduce the size of a file for storage or transmission. B. Data compression techniques can ... used if there may be a need to recover all of the original data from the compressed file.
Last Answer : A. Data compression techniques can be used to reduce the size of a file for storage or transmission.
Description : Which of these terms is a type of data compression? A. resolution B. zipping C. Inputting D. caching
Last Answer : B. zipping
Description : Compression in general makes it _______ to send, upload and stream data A. Quicker B. Slower
Last Answer : A. Quicker
Description : The purpose of data compression is to decrease file sizes . A. True B. False
Last Answer : A. True
Description : What is compression? A. To convert one file to another B. To reduce the size of data to save space C. To minimize the time taken for a file to be downloaded D. To compress something by pressing it very hard
Last Answer : B. To reduce the size of data to save space
Description : Which file in java uses zip compression? a) JAR b) JER c) ZAR
Last Answer : a) JAR
Description : From the following for which process ‘Archive Manager tool ‘ is used ? a) For transferring the data of file and directory b) For place compression on the file and directory c) For altering the form of file and directory d) For data compression on file and directory
Last Answer : d) For data compression on file and directory
Description : What is the reason that in the beginning of encoded file there is data telling which digit/letter represents which word ? a) It is needed to convert the file in compression form b) it is ... convert the file in its original uncompressed form d) it is needed to convert the file in graphical form
Last Answer : c) it is needed to convert the file in its original uncompressed form
Description : In data compression technique, each word is represented by what ? a) Digit b) Letter c) a or b d) Picture
Last Answer : c) a or b
Description : Which technique identify and eliminate less important information to conserve space ? a) Data compression b) Data repetition c) Data extension d) Data conservation
Last Answer : a) Data compression
Description : What process is done by the data compression while encoding the data ? a) Identifying repetition in the data b) Reducing repetition in the data c) Eliminating repetition in the data d) All of these
Last Answer : d) All of these
Description : By using data compression technique, what can be done in the data storage place of memory and disk ? a) increment b) Reduction c) Transfer d) Repetition
Last Answer : b) Reduction
Description : The techniques for reducing the storage requirement of computer files and directory structure are known by which name ? a) Data compression b) Data storage place c) Data form d) Data transfer
Description : Run length encoding is a compression method in which repeated ______ of a symbol are replaced. a. Residual b. Occurrence c. Letters d. None
Last Answer : b. Occurrence
Description : The design of the _____has a significant impact on the amount of compression. a. Cluster b. Quantizer c. Codebook d. Both (b) and (a)
Last Answer : b. Quantizer
Description : We can improve the amount of _______by accepting a certain degree of loss during the compression process. a. Compression b. Decompression
Last Answer : a. Compression
Description : Sliding windowing technique is used in which dictionary compression a. LZW b. LZ77 c. LZ78 d. Diagram coding
Last Answer : b. LZ77
Description : Compression method use for Integer type data a. Huffman b. LZ77 c. Golomb Code d. Adaptive Huffman
Last Answer : c. Golomb Code
Description : An Image is represented by 65536 X8 bits, and after compression it reduced to 16384 X8 bits. What will be the compression ratio: a. 55% b. 65% c. 75% d. 85%
Last Answer : c. 75%
Description : Compression is done for saving a. A. storage b. B. bandwidth c. C. money d. D. Both A and B
Last Answer : d. D. Both A and B
Description : What is compression? a. To convert one file to another b. To reduce the size of data to save space c. To minimize the time taken for a file to be downloaded d. To compress something by pressing it very hard
Last Answer : b. To reduce the size of data to save space
Description : Ms. Matthews is printing posters of her students' artwork. Since the images will be printed, they will need: A. a higher resolution for better print quality. B. a lower resolution for smaller ... a higher resolution to display on a monitor. D. a lower resolution in order to download faster.
Last Answer : A. a higher resolution for better print quality.
Description : __________ shape is used to make codebook in structure vector quantization. a. Square b. Rectangle c. Circle d. Hexagon
Last Answer : d. Hexagon
Description : A rate of something that repeats over and over. A. Pulse B. Wave C. Velocity D. Frequency
Last Answer : C. Velocity