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Digital Fundamentals

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A condition where all the load currents are equal and the neutral current is zero






2. The process of converting an analog signal to digital form






3. In Boolean algebra - the AND operation






4. A type of magnetic tape format






5. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






6. Sum of all currents entering a node is equal to the sum of all currents leaving the same node

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7. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






8. Dual in - line memory module






9. One of the three regions in a bipolar Junction transistor(North junction of NpN)






10. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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11. A type of PLD nonvolatile programmable link that can be left open or can be shorted once as directed by the program






12. The rotational rate of a phasor which is related to the frequency of the sine wave that the phasor represents






13. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






14. A document that specifies parameter values and operating conditions for an integrated circuits or other device






15. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic






16. A nominally continuous electrical signal that varies in amplitude or frequency in response to changes in sound - light - heat - position - or pressure.






17. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop






18. The process that prevents two sources from using a bus at the same time






19. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






20. An asynchronous input used to reset a flip- flop (make the Q output 0); to place a register or counter in the state in which it contains all 0's






21. A bidirectional set of conductive paths on which data or instruction codes are transferred into a microprocessor or on which the result of an operation is sent out from the microprocessor






22. The application of a dc voltage to an electronic device to produce a desired mode of operation






23. The current left after the total load current is subtracted from the total current into the circuit






24. A interconnection of electrical components designed to produce a desired result. A basic circuits consists of a source - a load and an interconnecting current path.






25. A semiconductor device that conducts current in only one direction






26. In addition (Oring) and multiplication (ANDing) of three or more variables - the order in which the variables are grouped makes no difference






27. A group of eight bits






28. The time from the application of a valid memory address to the appearance of valid output data






29. Burst extended data output dynamic random- access memory






30. Data Terminal equipment






31. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






32. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






33. The ratio of pulse width to period expressed as a percentage






34. A logic gate that produces a High output only when all of the inputs are HIGH






35. The number of protons in a nucleus






36. A circuit (digital service) that switches digital data from one input line to several output lines in a specified time sequence






37. A digital circuit that compares the magnitudes of two quantiities and produces an output indicating the relationship of the quantities






38. Digital Signal Processor; a special type of microprocessor that processes data in real time






39. Having two stable states. Flip- flops and latches are bistable multivibrators.






40. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






41. A class of integrated logic circuits that is implemented with a type of field effect transistor






42. The beginning address of a segment of memory






43. A unit of the cross - sectional area of a wire.






44. A circuit that prevents loading of an input or output






45. A reduction of the output signal compared to the input signal - resulting in a ratio with a value of less than 1 for the output voltage to the input voltage of a circuit.






46. A method of analog- to- digital conversion using a 1- bit quantization process






47. In Boolean algebra - the OR operation






48. American Standard Code for Information Interchange; the most widely used alphanumeric code.






49. An electrical device consisting of two conductive plates separated by an insulating material and possessing the property of capacitance.






50. The graph of a filter's frequency response showing the change in the output voltage to input voltage ratio expressed in dB as a function of frequency for a constant input voltage