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?
Last Answer : Non-return-to-zero (NRZ) encoding.
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 : 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 : 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 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 : When computers use the cylinder method to store data on a hard disk pack, what three items make up the address that tells the computer where on a specific disk to store the data?
Last Answer : . a. Cylinder number. b. Recording surface number.
Description : What are the three most popular methods for encoding digital data onto magnetic disks?
Last Answer : a. Frequency modulation (FM). b. Modified frequency modulation (MFM). c. Run length limited (RLL).
Description : Which of the eight methods for encoding digital data onto magnetic tape is most widely used because it’s accurate, simple, and reliable?
Description : What format of digital tape recording takes a serial input stream of data pulses, breaks them up, and records them on more than one data track?
Last Answer : Serial-parallel digital magnetic tape recording.
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 : 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 : What is the most common method for erasing a hard disk?
Last Answer : Reformat the disk.
Description : What three components determine the address that locates where on a floppy disk the computer will store the data?
Last Answer : a. disk side number, b. track number, and c. sector number.
Description : What type of floppy disk is made to store data on both sides of the disk
Last Answer : Double-sided.
Description : The amino acids present in pulses can supplement the limiting amino acids of (A) Cereals (B) Milk (C) Fish (D) Nuts and beans
Last Answer : Answer : A
Description : The limiting amino acid in pulses is (A) Leucine (B) Lysine (C) Tryptophan (D) Methionine
Last Answer : Answer : D
Description : To what temporary area can you store text and other data, and later paste them to another location? 1) The clipboard 2) ROM 3) CD-ROM 4) The hard disk 5) None of these
Last Answer : Answer :1
Description : Which of the following storage devices can store maximum amount of data? A) Floppy Disk B) Hard Disk C) Compact Disk D) Magneto Optic Disk
Last Answer : Answer : B
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 device can store large amounts of data? 1) Floppy Disk 2) Hard Disk 3) CDROM 4) Zip Disk
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 : 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 : 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 : What format of digital tape recording is normally used to store computer data?
Last Answer : Parallel digital magnetic tape recording.
Description : Why do floppy disk drives require more preventive maintenance than hard disk drives?
Last Answer : They are not sealed units, and they use flimsy plastic disks with an oxide coating that wears off and sticks to the heads
Description : In the actuator arm assembly of a hard disk drive transport, what device can position the magnetic heads to the correct track of a hard disk more accurately than a dc stepper motor?
Last Answer : Voice coil servo.
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 type of hard disk drive interface has all of the controller card electronics included in the disk drive itself?
Last Answer : Integrated drive electronics (IDE).
Description : The control electronics component of a floppy or hard disk drive performs what three main functions?
Last Answer : a. Spins the disk at the correct speed. b. Moves the heads across the recording surface. c. Tells the write/read heads when to write data and when to read it.
Description : Cartridge hard disk drives with 14" disk packs may require what additional types of preventive maintenance?
Last Answer : a. Cleaning with a special cleaning disk. b. Cleaning air filters. c. Cleaning spindles, rails, and slides. d. Cleaning and buffing read/write heads.
Description : Hard disk drive transports contain the electromechanical parts that perform what three functions?
Last Answer : a. Rotates the hard disk platters. b. Writes data to and reads data from the disk platters
Description : What is the most common type of hard disk failure?
Last Answer : Head-crash.
Description : What are the three most common sizes of hard disk platters?
Last Answer : 3-1/2 inches, 5-1/4 inches, and 14 inches.
Description : What characteristic of sound enables a person to distinguish one musical instrument from another, if they are all playing the same note?
Last Answer : Quality.
Description : A, what logic element enables FF3 to toggle with the clock?
Last Answer : The AND gate
Description : What basic requirement of a closed-loop system (not present in open-loops) enables present load position to be sensed?
Last Answer : Feedback.
Description : In a bistable multivibrator, how many trigger pulses are needed to produce one complete cycle in the output?
Last Answer : Two.
Description : How many clock pulses are required to output a 4-bit number in serial form?
Last Answer : Four.
Description : . What type of counter has clock pulses applied to all FFs?
Last Answer : Synchronous.
Description : Which receiver component converts the IF pulses to video pulses?
Last Answer : Detector.
Description : Which of the basic timing circuits produces sharp trigger pulses directly?
Last Answer : Blocking oscillators.
Description : what causes the initial and final pulses on the receiver output signal?
Last Answer : Leakage from the duplexer.
Description : A self-synchronized radar system obtains timing trigger pulses from what source?
Last Answer : Transmitter.
Description : Range-marker generators produce pulses based on what radar constant?
Last Answer : The radar mile (12.36 microseconds).
Description : Current that flows in pulses in the same direction is called
Last Answer : Pulsating dc
Description : What is the greatest limiting factor in a receiver’s detectable range
Last Answer : Noise.
Description : Fiber-to-fiber coupling loss is affected by intrinsic and extrinsic coupling losses. Can intrinsic coupling losses be limited by limiting fiber mismatches?
Last Answer : Yes.
Description : Should the capacitance of the photodetector be kept small or large to prevent the RC time constant from limiting the response time?
Last Answer : Small
Description : What is the limiting factor as to the amount of current an electrodynamometer meter movement can handle?
Last Answer : Size of spiral conducting.