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






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






3. The range of frequencies for which the current (or output voltage) is equal to or greater than 70.7% of its value at the resonant frequency that is considered to be passed by a filter.






4. One current path in a parallel circuit; a current path that connects two nodes






5. A number given in ampere- hours determined by multiplying the current times the length of the time (h) a battery can deliver that current to a load






6. Consisting of numerals - letters - and other characters






7. Burst extended data output dynamic random- access memory






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






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






10. Describes a number system with a base of ten






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






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






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






14. One of the three regions in a bipolar junction transistor






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






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






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






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






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






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 stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






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






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






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






26. 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






27. Digital audio tape; a type of magnetic tape format






28. Transistor-Transistor Logic and is implemented with bipolar junction transistors






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






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






31. A receiving device on a bus






32. The law that states ORing several variables and then ANDing the single variable with each of the several variables and the ORing the product






33. In Boolean algebra - the OR operation






34. Having two opposites charge carriers within the transistor structure






35. 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.


36. 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.






37. Altera HDL; a nonstandard HDL






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






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






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






41. The location of a given storage cell or group of cells in a memory; a unique memory location containing on byte






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






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






44. Data Terminal equipment






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






46. A set of conductive paths hat connects the CPU to other parts of the computer to coordinate its operations and to communicate with external devices






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






48. To decrease the binary state of a counter by one






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






50. 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