Description : Which of the eight methods for encoding digital data onto magnetic tape is most widely used because it’s accurate, simple, and reliable?
Last Answer : Non-return-to-zero (NRZ) encoding.
Description : Which digital data tape encoding method presets the magnetic tape to all zeros and then records digital ones onto the tape?
Last Answer : Return-to-bias (RB) encoding.
Description : Older, single-sided, single-density floppy disk drives would probably use what method for encoding digital data onto the floppy disk?
Last Answer : Frequency-modulation encoding.
Description : What method for encoding digital data enables you to store more data in less space by limiting the distance between pulses on a hard disk?
Last Answer : Run length-limited (RLL) encoding.
Description : Which digital data encoding method helps overcome a tape recorder’s low-frequency response problems by recording two logic levels for each incoming data bit?
Last Answer : Bi-phase level encoding.
Description : Which method of digital data encoding does NOT return the tape to neutral between pulses but, instead, saturates the tape positively or negatively as the incoming data changes between zero and one?
Description : Which digital data encoding method records a digital one as a positive pulse and a digital (zero) as a negative pulse and returns the tape to neutral between pulses?
Last Answer : Return-to-zero (RZ) encoding.
Description : Which of the following is an example of an optical disk? 1) Magnetic disks 2) Memory disks 3) Data bus disks 4) Digital versatile disks
Last Answer : 4) Digital versatile disks
Description : Which of the following is an example of an optical disk? 1 Magnetic disks 2 Memory disks 3 Data bus disks 4 Digital versatile disks
Last Answer : 4 Digital versatile disks
Description : Why should you never place floppy disks near telephones or other electronic equipments that generate magnetic fields?
Last Answer : Magnetic fields can destroy the data on a disk.
Description : Magnetic disks are the most popular medium for A) Direct access B) Sequential access C) Both of above D) None of above
Last Answer : Answer : C
Last Answer : Answer : D
Description : Magnetic disks are the most popular medium for a. Direct access b. Sequential access c. Both of above d. None of above
Last Answer : Both of above
Last Answer : c. Both of above
Description : Digital magnetic tape recorders used to store and retrieve digital data fall into what three categories?
Last Answer : a. Computer-compatible digital tape recorders. b. Telemetry digital tape recorders. c. Instrumentation digital tape recorders
Description : In digital magnetic tape recording, the series of recorded digital pulses can represent what three types of data?
Last Answer : a. Data used by digital computers. b. Pulsed squarewave signals. c. Digitized analog waveforms.
Description : After using a tape that was stored in an area where temperatures exceeded 130º F you notice pieces of oxide sticking to the recorder's tape-transport mechanism, to its magnetic heads, and onto the tape. What is the probable cause of these symptoms?
Last Answer : Oxide shedding. At temperatures above 130º F, oxide coating becomes soft and sheds.
Description : Floppy disks are manufactured in what three sizes?
Last Answer : 8 inch, 5 1/4 inches, 3 1/2 inches.
Description : What are the three most common sizes of floppy disks?
Last Answer : 8 inch, 5 1/4 inch, and 3 1/2 inch.
Description : Which of the following storage device can be used for storing large backup data? (a) Floppy disks (b) Hard disk (c) Magnetic tapes (d) None of these -Technology
Last Answer : "B) Hard Disk.
Description : Which of the following areadvantagesof CD-ROM as a storage media? (A) CD-ROM is aninexpensive way to store large, amount of data and information (B) CD-ROM disks retrieve data and information more quickly than ... (C) CD-ROMs make lesserrors than magnetic media (D) An of the above (E) None of these
Last Answer : An of the above
Description : Which of, the following isa storagedevice that uses rigid,permanently installed magnetic disks to store data/information– (A) floppy diskette (B) hard disk (C) permanent disk (D) opticaldisk (E) None of these
Last Answer : hard disk
Description : Which of the following is a storage device that uses rigid, permanently installed magnetic disks to store data/information - 1) Floppy diskette 2) Hard disk 3) Permanent disk 4) None of these
Last Answer : 2) Hard disk
Description : Which of the following is a storage device that uses rigid, permanently installed magnetic disks to store data/information - 1 Floppy diskette 2 Hard disk 3 Permanent disk 4 None of these
Last Answer : 2 Hard disk
Description : What three formats are used for digital magnetic tape recording?
Last Answer : 1) Serial, (2) parallel, and (3) serial-parallel.
Description : In Manchester encoding, does a low-to-high light level transition occurring in the middle of the bit duration represent a binary 1 or a binary 0?
Last Answer : Binary 0.
Description : What are the four widely used variations of the NRZ encoding method?
Last Answer : a. Non-return-to-zero level (NRZ-L). b. Enhanced non-return-to-zero level (E-NRZ-L). c. Non-return-to-zero mark (NRZ-M). d. Non-return-to-zero space (NRZ-S).
Description : Which of the following encoding methods does not provide for synchronization? A) NRZ-L B) RZ C) NRZ-I D) Manchester
Last Answer : NRZ-L
Description : ___________has become quite popular for encoding all kinds of images, both computer-generated and “natural” images. a. GIF b. PNG c. TIFF d. JPEG
Last Answer : a. GIF
Description : If disks are stored horizontally, how many can be stacked?
Last Answer : No more than ten.
Description : hard disks should be stored in an environment that stays within what relative humidity and temperature range?
Last Answer : electronics onto the disk. 30-60 percent relative humidity. b. 70-80 degrees Fahrenheit.
Description : What are the two ways to erase floppy disks?
Last Answer : a. Degauss the disk and then reformat it. b. Reformat the disk.
Description : Why should you always store floppy disks in their envelopes?
Last Answer : Dust and other contaminates can get on the recording surface through the read/write hole.
Description : The floppy disks you are using have a rating of 96 TPI. What does this mean?
Last Answer : The disks can hold 96 tracks per inch.
Description : The signals which are obtained by encoding each quantized signal into a digital word is called as a) PAM signal b) PCM signal c) FM signal d) Sampling and quantization
Last Answer : b) PCM signal
Description : Which of following is not a rule of digital forensics? A. An examination should be performed on the original data B. A copy is made onto forensically sterile media. New media should always be used ... D. The examination must be conducted in such a way as to prevent any modification of the evidence.
Last Answer : A. An examination should be performed on the original data
Description : Which of the following have the fastest access time? A) Semiconductor Memories B) Magnetic Disks C) Magnetic Tapes D) Compact Disks
Last Answer : Answer : A
Description : Which of the following are the cheapest memory devices in terms of Cost/Bit? A) Semiconductor memories B) Magnetic Disks C) Compact Disks D) Magnetic Tapes
Description : The ALU of a computer normally contains a number of high speed storage element called A) Semiconductor memory B) Registers C) Hard disks D) Magnetic disk
Last Answer : Answer : B
Description : Which technology is used in Compact disks? A) Mechanical B) Electrical C) Electro Magnetic D) Laser
Description : Which of the following is used as a primary storage device? A) Magnetic drum B) Hard Disks C) Floppy D) All of above
Description : Which among the following memory is capable of operating at "electronics speed": a) Semiconductor memory b) Magnetic Disks c) Magnetic Drums d) None of The Above
Last Answer : a) Semiconductor memory
Description : ROM is composed of 1) Magnetic cores 2) Micro-processors 3) Photoelectric cells 4) Floppy disks
Last Answer : 2) Micro-processors
Description : Which technology is used in Compact disks ? 1) Mechanical 2) Electrical 3) Electro Magnetic 4) Laser
Last Answer : 4) Laser
Description : Which of the following is an example of storage devices? 1) Magnetic disks 2) Tapes 3) DVDs 4) All of these
Last Answer : 4) All of these
Description : Which of the following is an example of storage devices? 1 Magnetic disks 2 Tapes 3 DVDs 4 All of these
Last Answer : 4 All of these
Description : The ALU of a computer normally contains a number of high speed storage element called a. Semiconductor memory b. Registers c. Hard disks d. Magnetic disk
Last Answer : b. Registers
Description : When winding a tape onto a plastic or metal reel, should the tape ever touch the reel’s flanges?
Last Answer : No. The reel is designed to hold the tape on its hub without letting the tape touch the sides of the flanges.
Description : . After rewinding a tape onto its supply reel, you examine the tape pack and notice pile-ups of tape resembling the example in figure 2-2. What causes this condition?
Last Answer : The tape is stopped too quickly when winding or rewinding.