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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 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






2. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






3. In a pulse waveform - the height or maximum value of the pulse as measured from its low level.






4. In Boolean algebra - the OR operation






5. 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






6. An array of AND gates consisting of a matrix of programmable interconnection






7. A filter that passes a range of frequencies lying between two critical freqencies and rejects frequencies above and below that range.






8. A digital code in which each of the decimal digits - 0 through 9 - is represented by a group of four bits






9. A digital circuit device that converts coded information into another (familiar) or noncoded form






10. Data Communications equipment






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






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






13. A resettable protective device used for interrupting execessive current in an electric circuit






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






15. Having two values or states; describes a number system that has a base of two and utilizes 1 and 0 as its digits






16. A transformer in which the primary and secondary are in a single winding






17. The process or sequence of operations carried out to program a target device






18. A circuit with a complete current path






19. The mathematics of logic circuits






20. The effect created when a signal is sampled at less than twice the signal frequency. Aliasing creates unwanted frequencies that interfere with the signal frequency.






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. A filter that rejects a range of frequencies lying between two critical frequencies and passes frequencies above and below that range.






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






24. A type of bistable multivibrator in which the output assumes the state of the D input on the triggering edge of a clock pulse.






25. A group of eight bits






26. A programming language that uses English like words and has a one- to- one correspondence to machine language






27. An adverse condition that could occur if two or more devices try to communicate at the same time on a bus






28. A program that converts English- like mnemonics into machine code






29. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






30. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






31. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






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






33. The action of a circuit in which it accepts current into its output from a load






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






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






36. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






37. The opposition of a capacitor to permit current; the reciprocal of capacitive reactance. The unit is the siemens.






38. In addition - the number to which the addend is added






39. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.

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40. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






41. The beginning address of a segment of memory






42. 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






43. A combined coder and decoder






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






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






46. A type of semiconductor memory having capacitive storage cells that lose stored data over a period of time and therefore must be refreshed.






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






48. A relatively small - high- speed memory that stores the most recently used instructions or data from the larger but slower main memory






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






50. A method for the automated testing of printed circuit boards in which the board is mounted on a fixture that resembles a bed of nails that makes contact with test points







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