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






3. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






4. American National Standards Institute






5. Data Communications equipment






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






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






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






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






10. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






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

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






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






14. A connection at the midpoint of a winding in a transformer






15. A receiving device on a bus






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






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






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






19. Dual in - line memory module






20. 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






21. 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






22. 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.






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






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






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






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






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






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






29. A logic circuit used to add two binary numbers






30. 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






31. 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






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






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






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






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






37. 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






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






39. The actual current in a branch






40. In Boolean algebra - the OR operation






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






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






43. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






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






45. 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






46. Data Terminal equipment






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






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. An electrical instrument used to measure current






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