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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. Characterized by ten states or values






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






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






4. 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.






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






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






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






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






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






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






11. 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






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






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






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






15. In addition (ORing) and multiplication (ANDing) of two variables the order in which the variables are ORed or ANDed makes no difference






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






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






18. The process of producing an output carry in full- adder when both input bits are 1s.






19. 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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20. In addition - the number to which the addend is added






21. 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






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






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






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






25. A receiving device on a bus






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






27. The maximum value of a voltage or current






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






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






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






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






32. Data Terminal equipment






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






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






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






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






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






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






39. The mathematics of logic circuits






40. 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






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






42. An electrical instrument used to measure current






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






44. A digital counter having ten states






45. 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






46. 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






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






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






49. 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.






50. The unit of electrical current