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






2. A type of counter in which each stage is clocked from the output of the preceding stage.






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






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






5. In a pulse waveform - the height or maximum value of the pulse as measured from its low level.






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






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






8. The unit of electrical current






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






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






11. An adverse condition that could occur if two or more devices try to communicate at the same time on a bus






12. Characterized by ten states or values






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






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






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






17. Information in numeric - alphabetic - or other form.






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






19. American Standard Code for Information Interchange; the most widely used alphanumeric code.






20. The ability of a capacitor to store electrical charge.






21. The beginning address of a segment of memory






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






23. Burst extended data output dynamic random- access memory






24. 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.






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






26. In Boolean algebra - the OR operation






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






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






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






30. A circuit that prevents loading of an input or output






31. 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.






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






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






34. 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






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






36. One of the three regions in a bipolar Junction transistor(North junction of NpN)






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






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






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






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






41. 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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42. 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.






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






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






45. In Boolean algebra - the AND operation






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






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






48. 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.






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






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