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






2. 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.






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






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






5. A type of IC package whose leads must pass through holes to the other side of a PC board






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






7. 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.






8. An expression of variables and operators used to express the operation of a logic circuit






9. A software compiler language for SPLD programming; a type of hardware description language (HDL)






10. Dual in - line memory module






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






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






13. American wire gauge; a standardization based on wire diameter






14. A set of interconnections that interface one or more devices based on a standardized specification






15. 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






16. 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






17. 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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18. An energy source that uses a chemical reaction to convert chemical energy into electrical energy.






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






20. Characterized by ten states or values






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






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






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






24. In a division operation the quantity that is being divided






25. The digit generated when the sum of two binary digits exceeds 1






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






27. In a PLD - a matrix formed by rows of product- term lines columns of input lines with a programmable cell at each junctions. In VHDL - an array is an ordered set of individual items called elements with a single identifier name.






28. A type of magnetic tape format






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






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






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






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






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






34. The average of a sine wave over one half- cycle. It is 0.637 times the peak value.






35. Data Communications equipment






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






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






38. 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.






39. 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






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






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






42. A condition where all the load currents are equal and the neutral current is zero






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






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






45. The number of protons in a nucleus






46. A binary digit - which can be either 1 or 0






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






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






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

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