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 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 : 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 : 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 of the eight methods for encoding digital data onto magnetic tape is most widely used because it’s accurate, simple, and reliable?
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 : 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 encoding method uses alternating positive and negative values for1s? A) NRZ-I B) RZ C) Manchester D) AMI
Last Answer : AMI
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 : Modern handheld digital tachometers operate by counting light pulses returned to the unit by ______________. A. the tach generator B. either the coupling or shaft C. a small bulb attached to the shaft D. a piece of reflective tape
Last Answer : Answer: D
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 record instrumentation or telemetry data?
Last Answer : Serial digital magnetic tape recording.
Description : What format of digital tape recording is normally used to store computer data?
Last Answer : Parallel digital magnetic tape recording.
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 : Third stage of Law of Variable Proportion is called - (1) negative returns (2) positive returns (3) constant returns (4) increasing returns
Last Answer : (1) negative returns Explanation: The stages of Law of Variable Proportion are: Stage 1: Increasing return: Stage 2: Diminishing return; and Stage 3: Negative Return. In the third stage Marginal Product of variable factor is zero. In this stage the Total Product starts diminishing.
Description : Third stage of Law of Variable Proportion is called (1) negative returns (2) positive returns (3) constant returns (4) increasing returns
Last Answer : negative returns
Description : Modulation in which no signal is present between pulses A. Pulse modulation B. QAM C. PSK D. FSK
Last Answer : A. Pulse modulation
Description : Which of the production is included in foodgrains production ? (A) Cereal (Rice & Wheat) crops, only (B) Pulse crops, only (C) Coarse cereal crops, only(D) All cereals (Rice & Wheat), pulses and coarse cereal crops
Last Answer : (D) All cereals (Rice & Wheat), pulses and coarse cereal crops
Description : why equalizing pulses are needed. Draw the vertical synchronizing pulse structure.
Last Answer : The ½ line difference just prior to the start of serrated vertical pulse does not affect the horizontal deflection synchronization but it does affect the vertical synchronization and the interlaced scanning. The ... the vertical sync pulse to occur at the correct time after every field.
Description : How is a negative charge created in a neutral body?
Last Answer : Through the accumulation of excess electrons.
Description : What category of digital tape recorder is used to record special signals with a bandwidth of less than 500 kHz?
Last Answer : Instrumentation digital tape recorders.
Description : What three formats are used for digital magnetic tape recording?
Last Answer : 1) Serial, (2) parallel, and (3) serial-parallel.
Description : The number of records contained within a block of data on magnetic tape is defined by the A) Block definition B) Record contain clause C) Blocking factor D) Record per block
Last Answer : Answer : C
Description : Which of the following is not true for a magnetic disk? A) It is expensive relative to magnetic tape B) It provides only sequential access to stored data C) Users can easily update records by writing over the old data D) All of above
Last Answer : Answer : B
Description : Which of the following is not true for a magnetic disk? a. It is expensive relative to magnetic tape b. It provides only sequential access to stored data c. Users can easily update records by writing over the old data d. All of above
Last Answer : It provides only sequential access to stored data
Last Answer : b. It provides only sequential access to stored data
Description : The number of records contained within a block of data on magnetic tape is defined by the a. Block definition b. Record contain clause c. Blocking factor d. Record per block factor
Last Answer : c. Blocking factor
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 : Is playing the numbers game more negative, neutral, or positive?
Last Answer : Overall I would have to say neutral. The numbers game IMO will play out much differently depending on the issue or task at hand.
Description : A hexa peptide with 5 aspartic acid would have a net charge at pH 7: (A) Neutral (B) Positive (C) Negative (D) Not predictable
Description : A good conductor while carrying current is - (1) alternately charged positive and negative (2) negatively charged (3) positively charged (4) electrically neutral
Last Answer : (2) negatively charged Explanation: Electrons carry current in a good conductor of electricity and they are negatively charged. This makes a good electrical conductor negatively charged.
Description : In the schematic diagram of the DC compound generator shown in the illustration, the positive ammeter reading is 500 amps and the negative ammeter reading is 475 amps. What is the current flow through the neutral bus? EL-0037 A. 0 amp B. 12.5 amp C. 25 amp D. 975 amp
Last Answer : Answer: C
Description : As the ahead valve opens as shown in the illustration, pin #5 of the Sensor ______________. EL-0099 A. becomes more negative B. becomes more positive C. approaches neutral point D. approaches ground potential
Last Answer : Answer: B
Description : A bus disconnect link is used to isolate _____________. A. one bus bar from another B. the generator circuit breaker from the bus C. different phases from the equalizer connection D. positive and negative buses from the neutral
Description : The main advantage of sunk key is that it is a _____ drive. a) Positive b) Negative c) Neutral d) None of the listed
Last Answer : a) Positive
Description : Sunk key is a .............. drive. A. Positive B. Negative C. Neutral D. None
Last Answer : A. Positive
Description : Which are more suitable normal form to be used with definite clause? a) Positive literal b) Negative literal c) Generalized modus ponens d) Neutral literal
Last Answer : c) Generalized modus ponens
Description : In liquids and gases the current is due to the motion a. negative charges b. positive charges c. both negative and positive charges d. neutral particles
Last Answer : c. both negative and positive charges
Description : When a semiconductor is doped with a P-type impurity, each impurity atom will (A) acquire negative charge. (B) acquire positive charge. (C) remain electrically neutral. (D) give away one electron.
Last Answer : (A) acquire negative charge.
Description : A good conductor while carrying current is (1) alternately charged positive and negative (2) negatively charged (3) positively charged (4) electrically neutral
Last Answer : negatively charged
Description : What method for erasing magnetic tape is much more effective and reliable than using a recorder’s erase head?
Last Answer : Using a magnetic tape degausser
Description : Punched cards, paper tape, and magnetic tape use what storage access method?
Last Answer : Sequential-access.
Description : The relationship between maturity and interest rates is known as ________ A. Yield Curve B. Zero Coupon Yield Curve C. Negative Yield Curve D. Neutral Yield Curve E. None of the Above
Last Answer : B. Zero Coupon Yield Curve Explanation: The Zero Coupon Yield Curve aka the Spot Curve is a relationship between maturity and interest rates which differs from a normal yield curve
Description : What is the term given to arranging data records in a predefined sequence or order?
Last Answer : Sorting.
Description : The following which shall be the personal responsibility of the Head Postmaster: a) Deciding claims in respect of Savings Certificates of deceased holders which lie within his power of decision and ... ) Sanctioning the transfer of savings certificates from one person to another. d) All the above
Last Answer : d) All the above
Description : Mark correct option related to preservation period a) All records of mail department except due mail & sorting list 1 year b) Book of post marks(MS 18) & Postman book (MS-27) 1 ½ year c) Enumeration returns (MS-6) 2 years d) All monthly statistical registers 3 years e) All of the above
Last Answer : e) All of the above
Description : What are two disadvantages of using a recorder’s erase head to erase data recorded on a magnetic tape?
Last Answer : Using an erase head is slow, and it may not completely erase the tape.
Description : What type of magnetic tape is used to record computer programs and data, and what are the additional thickness and quality standards for this type of tape?
Last Answer : digital magnetic tape is for computer programs and data. Its base material is about 50% thicker. The tape’s surface must not have blemishes or coating flaws because losing even one digital data bit could ruin the recorded computer program or data.