MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
________ symbols are needed to represent all digits in hexadecimal. |
| A. | Six |
| B. | Ten |
| C. | Twelve |
| D. | Sixteen |
| Answer» E. | |
| 2. |
Each hexadecimal digit converts to ________ binary digits. |
| A. | four |
| B. | eight |
| C. | 12 |
| D. | six |
| Answer» B. eight | |
| 3. |
Decimal 2875 is ________ bytes in binary. |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 4. |
Binary-coded-decimal 0111 1001 0011 is ________ in binary. |
| A. | 011110010011 |
| B. | 010110101111 |
| C. | 001100110011 |
| D. | 001100011001 |
| Answer» E. | |
| 5. |
Decimal 42 is equivalent to binary ________. |
| A. | 01000010 |
| B. | 52 |
| C. | 2A |
| D. | 101010 |
| Answer» E. | |
| 6. |
The decimal number 128 is represented in the signed 2's complement system as ________. |
| A. | 1111 1110 |
| B. | 0111 1111 |
| C. | 1000 0000 |
| D. | 1111 1111 |
| Answer» D. 1111 1111 | |
| 7. |
A typical CD-ROM can store ________ of digital data. |
| A. | 90 minutes |
| B. | analog portions |
| C. | 650 megabytes |
| D. | octal bytes |
| Answer» D. octal bytes | |
| 8. |
Hexadecimal 44 is ________ in binary. |
| A. | 01000100 |
| B. | 10011010 |
| C. | 01011000 |
| D. | 10001100 |
| Answer» B. 10011010 | |
| 9. |
Resistors usually 300 apiece inserted between a decoder and a 7-segment display are ________. |
| A. | pull-up resistors to keep logic HIGH when the input is open |
| B. | sense resistors to enable a test of logic levels |
| C. | current limiting resistors for the 7-segment display |
| D. | surge resistors to prevent damage from power-line variations |
| Answer» D. surge resistors to prevent damage from power-line variations | |
| 10. |
Decimal 37 is ________ in binary with an even parity bit. |
| A. | 00100101 |
| B. | 10100101 |
| C. | 11000100 |
| D. | 01001011 |
| Answer» C. 11000100 | |
| 11. |
Adding a zero to the leftmost bit of an ASCII code is called ________. |
| A. | extra zero |
| B. | zero padding |
| Answer» C. | |
| 12. |
The largest BCD number that can be represented with four binary bits is ________. |
| A. | 9 |
| B. | 10 |
| C. | 15 |
| D. | 16 |
| Answer» B. 10 | |
| 13. |
The two digits in the binary number system are ___ and ___. |
| A. | 1, 2 |
| B. | H, L |
| C. | T, F |
| D. | 0, 1 |
| Answer» E. | |
| 14. |
The decimal fraction 1/4 can be written in binary as________. |
| A. | 0.010 |
| B. | 0.100 |
| C. | 0.110 |
| D. | 0.011 |
| Answer» B. 0.100 | |
| 15. |
An unweighted code in which only one bit changes from one code number to the next is ________. |
| A. | BCD |
| B. | Excess-3 |
| C. | Gray |
| D. | ASCII |
| Answer» D. ASCII | |
| 16. |
Decimal 474 is ________ in BCD. |
| A. | 0100 0111 0100 |
| B. | 0100 1011 0101 |
| C. | 0100 1001 0011 |
| D. | 0110 1011 1001 |
| Answer» B. 0100 1011 0101 | |
| 17. |
Hexadecimal F2 is ________ in binary. |
| A. | 11100011 |
| B. | 10100001 |
| C. | 11110010 |
| D. | 11111100 |
| Answer» D. 11111100 | |
| 18. |
An ADC is an analog-to-digital converter. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 19. |
Memory devices store binary data. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 20. |
A graph of phase vs. time is a timing diagram. |
| A. | True |
| B. | False |
| Answer» C. | |
| 21. |
The arithmetic/logic unit will send the results of its decisions to memory. |
| A. | True |
| B. | False |
| Answer» C. | |
| 22. |
Digital systems require that voltage levels change between high and low. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 23. |
It is possible to have an overlap between high and low levels in digital logic. |
| A. | True |
| B. | False |
| Answer» C. | |
| 24. |
X-ray, MRI, and ultrasound systems in hospitals are examples of analog systems. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 25. |
With an OR gate, the output is HIGH only when both inputs are HIGH. |
| A. | True |
| B. | False |
| Answer» C. | |
| 26. |
A microcomputer is not a general-purpose computer. |
| A. | True |
| B. | False |
| Answer» C. | |
| 27. |
An invalid digital signal is used as a zero. |
| A. | True |
| B. | False |
| Answer» C. | |
| 28. |
In a positive logic system, the logic LOW could be between 0 V and 0.8 V. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 29. |
An inverter performs a NOT operation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 30. |
Greater accuracy and precision are possible with digital techniques. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 31. |
The real world is mainly analog. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 32. |
Using digital techniques of information storage is easy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 33. |
One advantage of analog circuits over digital circuits is that it's easier to store data. |
| A. | True |
| B. | False |
| Answer» C. | |
| 34. |
Digital circuits cannot perform logic comparisons since the circuit can have only one of two values at any instant. |
| A. | True |
| B. | False |
| Answer» C. | |
| 35. |
Telecommunications systems do not use digital techniques. |
| A. | True |
| B. | False |
| Answer» C. | |
| 36. |
Binary means having two states or values. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 37. |
Four bits equal one byte. |
| A. | True |
| B. | False |
| Answer» C. | |
| 38. |
The time interval on the leading edge of a pulse between 10% and 90% of the amplitude is the rise time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 39. |
In a negative logic system, the area represented by #3 in the given figure would be the ________ level. |
| A. | HIGH |
| B. | LOW |
| C. | off |
| D. | uncertain |
| Answer» B. LOW | |
| 40. |
The area represented by #4 in the given figure is the ________ level. |
| A. | HIGH |
| B. | LOW |
| C. | off |
| D. | unacceptable |
| Answer» E. | |
| 41. |
A continually variable, proportional indicator is a(n) ________ representation. |
| A. | decimal |
| B. | digital |
| C. | unconstitutional |
| D. | analog |
| Answer» E. | |
| 42. |
The control and arithmetic/logic units are often considered as one unit called the ________. |
| A. | central processing unit |
| B. | inputs and outputs |
| C. | microcomputer |
| D. | arithmetic/logic unit |
| Answer» B. inputs and outputs | |
| 43. |
A microcontroller would not be used in a(n) ________. |
| A. | VCR |
| B. | automobile ignition system |
| C. | antilock brakes |
| D. | grandfather clock |
| Answer» E. | |
| 44. |
________ is the highest-value seven-bit binary number. |
| A. | 128 |
| B. | 127 |
| C. | 126 |
| D. | 125 |
| Answer» C. 126 | |
| 45. |
The systems shown in the given figure communicate using ________. |
| A. | parallel data |
| B. | serial data |
| C. | serial-parallel data |
| D. | both parallel and serial data |
| Answer» B. serial data | |
| 46. |
A binary number can be converted to be viewed on a 7-segment display by a(n) ________. |
| A. | decoder |
| B. | encoder |
| C. | multiplexer |
| D. | magnitude comparator |
| Answer» B. encoder | |
| 47. |
The CPU contains all the circuitry for ________. |
| A. | storing data |
| B. | keeping track of time |
| C. | fetching and interpreting instructions |
| D. | Internet operations |
| Answer» D. Internet operations | |
| 48. |
Demultiplexing is a logic function that ________. |
| A. | determines which of several inputs is the greatest |
| B. | switches logic from one input to any of several output lines |
| C. | switches logic from several inputs onto one output line |
| D. | converts a code from one form to another |
| Answer» C. switches logic from several inputs onto one output line | |
| 49. |
In ________ the quantities are not represented by continuously variable indicators. |
| A. | analog representation |
| B. | digital representation |
| C. | signal representation |
| D. | computer representation |
| Answer» C. signal representation | |
| 50. |
The combination of waveforms consisting of the given figures 1 and 2 is generally referred to as ________. |
| A. | simultaneous waveforms |
| B. | a timing diagram |
| C. | two-phase waveforms |
| D. | pulse waveforms |
| Answer» C. two-phase waveforms | |