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Digital Fundamentals

Subject : engineering
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. The smallest particle of an element possessing the unique characteristics of that element.

2. In relation to VHDL feature that permits operations to be processed in a parallel;that is operations that occur simultaneously

3. A one- way group of conductors from the to a memory - or other external device - on which the address code is sent

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

5. 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

6. The total number of data units(bits - nibbles - bytes - words) that a memory can store.

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

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

9. 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.

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

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

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

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

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

15. A digital counter having ten states

16. A electrical property of matter that exist because of an excess or a deficiency of electrons. Can be either positive or negative

17. The phasor combination of resistive power (true power) and reactive power. The unit is the volt- amperes (VA).

18. A device used to convert an analog signal to a sequence of digital codes

19. An arrangement of electrical and/or electronic components interconnected in such a way as to perform a specified function

20. A type of semiconductor memory that stores data in the form of charge packets and is serially accessed

21. A VHDL feature that can be used to predefine the logic function for multiple use throughout a program or programs

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

23. The beginning address of a segment of memory

24. In addition - the number that is added to another number called the augend

25. The mathematics of logic circuits

26. A measure of the ability of a reactive circuit to permit current; the reciprocal of impedance. the unit is the siemens

27. Altera HDL; a nonstandard HDL

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

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

30. A basic logic operation in which a true(high) output occurs only when all the input conditions are true (high)

31. A notational system for logic symbols that specifies input and output relationships thus fully defining a given function

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

33. The portion of the CPU that interfaces with the system buses and fetches instructions - reads operands - and writes results.

34. The actual current in a branch

35. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa

36. A type of inductor used to block or choke off high frequencies

37. A series of bits describing a final design that is sent to the target device during programming

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

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

40. 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

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

42. The normal level of a pulse waveform; the voltage level in the absence of a pulse.

43. Characteristic of cells in a Karnaugh map in which there is a single- variable change from one cell to another cell next to it on any of its four sides

44. The maximum value of a voltage or current

45. Having two opposites charge carriers within the transistor structure

46. A method for internally testing a PLD based on the JTAG standard (IEEE std.)

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

48. An electrical instrument used to measure current

49. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.

50. Having two directions. the stored data can be shifted right or left