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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. Altera HDL; a nonstandard HDL






2. 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






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






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






5. An electrical instrument used to measure current






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

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






8. 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.






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






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






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






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






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






14. The beginning address of a segment of memory






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






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






17. A logic circuit used to add two binary numbers






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






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






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






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






22. American National Standards Institute






23. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






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






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






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






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






28. 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.






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






30. The VHDL unit that describes the internal operation of a logic function; the internal functional arrangement of the elements that give a device its particular operating characteristics.






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






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






33. Consisting of numerals - letters - and other characters






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






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






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






37. Dual in - line memory module






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






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






40. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






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






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






43. 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






44. 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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45. A group of eight bits






46. In Boolean algebra - the AND operation






47. 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






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






49. 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






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