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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 Boolean algebra - the OR operation






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






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






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






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






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






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






8. The action of a circuit in which it accepts current into its output from a load






9. Dual in - line memory module






10. Burst extended data output dynamic random- access memory






11. A reduction of the output signal compared to the input signal - resulting in a ratio with a value of less than 1 for the output voltage to the input voltage of a circuit.






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






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






14. A digital circuit device that converts coded information into another (familiar) or noncoded form






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






16. Data Terminal equipment






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






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






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






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






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






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






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






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






26. A receiving device on a bus






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






28. A circuit with a complete current path






29. 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






30. 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






31. 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.






32. 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






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






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






35. Bipolar junction transistor; a semiconductor device used for switching or amplification. A BJT has two junctions - the base- emitter junction and the base- collector junction






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






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






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






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






40. 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.






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






42. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






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






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






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






46. Sum of all the voltage drops in series equals to the source voltage

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






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






49. A combined coder and decoder






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







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