MCQOPTIONS
Saved Bookmarks
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. |
Conversion of an octal number 47 to its binary number is |
| A. | 110011 |
| B. | 100111 |
| C. | 110011 |
| D. | 1111011 |
| E. | None of the above |
| Answer» C. 110011 | |
| 2. |
Conversion of an octal number 3137 to it's decimal equivalent is |
| A. | 1631 |
| B. | 1632 |
| C. | 1531 |
| D. | 1931 |
| E. | None of the above |
| Answer» B. 1632 | |
| 3. |
Conversion of an octal number 73 to binary number is |
| A. | 110111 |
| B. | 111100 |
| C. | 110010 |
| D. | 111011 |
| E. | None of the above |
| Answer» E. None of the above | |
| 4. |
Conversion of binary number 1100001 to hexadecimal is |
| A. | 57 |
| B. | 61 |
| C. | 51 |
| D. | 43 |
| E. | None of the above |
| Answer» C. 51 | |
| 5. |
Conversion of an octal number 125 to its decimal number is |
| A. | 90 |
| B. | 85 |
| C. | 87 |
| D. | 99 |
| E. | None of the above |
| Answer» C. 87 | |
| 6. |
Conversion of an octal number 110 to its decimal number is |
| A. | 70 |
| B. | 72 |
| C. | 73 |
| D. | 110 |
| E. | None of the above |
| Answer» C. 73 | |
| 7. |
Conversion of hexadecimal number 1D7F to a decimal number is |
| A. | 7551 |
| B. | 8771 |
| C. | 5557 |
| D. | 7781 |
| E. | None of the above |
| Answer» B. 8771 | |
| 8. |
Conversionofahexadecimal number 6316 to binary number is |
| A. | 1001112 |
| B. | 1000112 |
| C. | 110112 |
| D. | 1001112 |
| E. | one of the above |
| Answer» C. 110112 | |
| 9. |
Conversionofbinarynumber 11000112 to its decimal number is |
| A. | 910 |
| B. | 710 |
| C. | 910 |
| D. | 310 |
| E. | one of the above |
| Answer» D. 310 | |
| 10. |
Conversionofbinarynumber 10010102 to to its decimal number is |
| A. | 410 |
| B. | 710 |
| C. | 210 |
| D. | 310 |
| E. | one of the above |
| Answer» B. 710 | |
| 11. |
Conversionofbinarynumber 10010012 to hexadecimal is |
| A. | 016 |
| B. | 916 |
| C. | 916 |
| D. | 216 |
| E. | one of the above |
| Answer» D. 216 | |
| 12. |
Digitaldesignoftenstartsby constructing a _____ table. |
| A. | tandard |
| B. | wo-stage |
| C. | ruth |
| D. | wo-dinensional |
| E. | one of the above |
| Answer» D. wo-dinensional | |
| 13. |
Conversion of decimal number 8910 it's binary number equivalent is |
| A. | 10110112 |
| B. | 11001112 |
| C. | 10110012 |
| D. | 100112 |
| Answer» D. 100112 | |
| 14. |
The clock signals are used in sequential logic circuits |
| A. | to tell the time of the day |
| B. | to tell how much time has elapsed since the system was turned on |
| C. | to carry serial data signals |
| D. | to synchronize events in various parts of a system |
| Answer» E. | |
| 15. |
What is the 1's complement of 0000 1111 0010 1101 number? |
| A. | 1111 0000 0010 1101 |
| B. | 1111 0000 1101 0010 |
| C. | 1111 1100 1010 1100 |
| D. | 1001 0010 1010 1100 |
| Answer» C. 1111 1100 1010 1100 | |
| 16. |
A full-adder adds _____ bits, and producing a SUM and a _____ |
| A. | 8, SUBTRACTION |
| B. | 3, CARRY |
| C. | 16, DIVIDE |
| D. | All of the above |
| Answer» C. 16, DIVIDE | |
| 17. |
An XOR gate recognizes only words with an _____ number of 1's. |
| A. | even |
| B. | odd |
| C. | different |
| D. | All of the above |
| Answer» C. different | |
| 18. |
A gate is a logic circuit with one or more input signals but _____ output signal. |
| A. | two |
| B. | double |
| C. | one |
| D. | more than one |
| Answer» D. more than one | |
| 19. |
Cyclic codes are used in |
| A. | data transfer |
| B. | continuously varying signal representation |
| C. | arithmetic and logical computation |
| D. | All of the above |
| Answer» C. arithmetic and logical computation | |
| 20. |
Semiconductor memory is: |
| A. | somewhat slower than magnetic core memory |
| B. | a volatile memory |
| C. | somewhat larger than the magnetic core memory |
| D. | All of the above |
| Answer» C. somewhat larger than the magnetic core memory | |
| 21. |
A NOR gate recognizes only the input word whose bits are _____ |
| A. | 0's and 1's |
| B. | 1's |
| C. | 0's |
| D. | 0's or 1's |
| Answer» D. 0's or 1's | |
| 22. |
A demultiplexer is also known as |
| A. | data selector |
| B. | data distributor |
| C. | multiplexer |
| D. | encoder |
| Answer» C. multiplexer | |
| 23. |
Addition of 1101012 and 1011112 is |
| A. | 11001002 |
| B. | 11010002 |
| C. | 11101112 |
| D. | 1100112 |
| Answer» B. 11010002 | |
| 24. |
Why are digital circuits easier to design than analog circuits? |
| A. | they do not control electricity precisely over a wide range |
| B. | they are made in the form of ICs |
| C. | all elements of digital circuit are from the same family |
| D. | they are smaller in size |
| Answer» B. they are made in the form of ICs | |
| 25. |
In which of the following adder circuits, the carry look ripple delay is eliminated? |
| A. | Half adder |
| B. | Full adder |
| C. | Parallel adder |
| D. | Carry-look-ahead adder |
| Answer» E. | |
| 26. |
A 2's-complement adder-subtracter can add or subtract binary numbers. Sign-magnitude numbers represent _____ decimal numbers, and 2's complements stand for _____ decimal numbers. |
| A. | hexa, sign |
| B. | sign, hexa |
| C. | positive, negative |
| D. | negative, positive |
| Answer» D. negative, positive | |
| 27. |
A microcomputer is a computer that uses a _____ for its CPU. |
| A. | chips |
| B. | registers |
| C. | microprocessor |
| D. | vacuum tube |
| Answer» D. vacuum tube | |
| 28. |
Conversion of hexadecimal number 93FA16 to it's binary number equivalent is |
| A. | 10010000000000000 |
| B. | 100100000000000000 |
| C. | 1100110000000000 |
| D. | 1111100000000 |
| Answer» B. 100100000000000000 | |
| 29. |
For what logic gate the outputs in complement of the input? |
| A. | NOT |
| B. | AND |
| C. | OR |
| D. | XOR |
| Answer» B. AND | |
| 30. |
Division of 1000112 by 1012 is |
| A. | 1002 |
| B. | 1112 |
| C. | 1012 |
| D. | 10102 |
| Answer» C. 1012 | |
| 31. |
A flip-flop can store |
| A. | one bit of data |
| B. | two bits of data |
| C. | three bits of data |
| D. | any number of bits of data |
| Answer» B. two bits of data | |
| 32. |
Computer ICs work reliably because they are based on _____ design. |
| A. | Top-bottom |
| B. | System |
| C. | Two-stage |
| D. | Two-states |
| Answer» E. | |
| 33. |
The two basic technologies for digital ICs are bipolar and MOS. Bipolar technology is preferred for_____ and _____ whereas MOS technology is better suited to LSI. |
| A. | SSI, MSI |
| B. | MSI, LSI |
| C. | SSI, LSI |
| D. | ECL, DTL |
| Answer» B. MSI, LSI | |
| 34. |
Conversion of decimal number 9310 to hexadecimal number is |
| A. | 2D16 |
| B. | 5D16 |
| C. | 6216 |
| D. | 3116 |
| Answer» C. 6216 | |
| 35. |
A half-adder is also known as: |
| A. | AND circuit |
| B. | NAND circuit |
| C. | NOR circuit |
| D. | EX-OR circuit |
| Answer» E. | |
| 36. |
What logic function is obtained by adding an inverter to the output of an AND gate? |
| A. | OR |
| B. | NAND |
| C. | XOR |
| D. | NOR |
| Answer» C. XOR | |
| 37. |
How many full adders are required to construct an m- bit parallel adder? |
| A. | m/2 |
| B. | m-1 |
| C. | m |
| D. | m+1 |
| Answer» D. m+1 | |
| 38. |
FETs are used in linear ICs to: |
| A. | increase input resistance |
| B. | provide large resistances |
| C. | increase device complexity |
| D. | (a) and (b) above |
| Answer» E. | |
| 39. |
Conversion of decimal number 9910 to it's octal number equivalent is |
| A. | 1218 |
| B. | 1438 |
| C. | 1248 |
| D. | 1198 |
| Answer» C. 1248 | |
| 40. |
The OR gate has two or more input signals. If any input is _____ the output is high. |
| A. | low |
| B. | high |
| C. | 0 |
| D. | All of the above |
| Answer» C. 0 | |
| 41. |
The 1's compliment of binary number 11010 is: |
| A. | 101 |
| B. | 10 |
| C. | 110 |
| D. | 11101 |
| Answer» B. 10 | |
| 42. |
A byte is consist of _____ bits |
| A. | two |
| B. | four |
| C. | eight |
| D. | ten |
| Answer» D. ten | |
| 43. |
What table shows the electrical state of a digital circuit's output for every possible combination of electrical states in the inputs? |
| A. | Function table |
| B. | Truth table |
| C. | Routing table |
| D. | ASCII table |
| Answer» C. Routing table | |
| 44. |
Conversion of an octal number 74328 to a binary number is |
| A. | 11110000000000 |
| B. | 1111000000000 |
| C. | 1100110000000 |
| D. | 1111110000000 |
| Answer» C. 1100110000000 | |
| 45. |
The NOR gate is logically equivalent to an OR gate followed by an _____ |
| A. | AND |
| B. | XAND |
| C. | XOR |
| D. | inverter |
| Answer» E. | |
| 46. |
A multiplexer is also known as |
| A. | coder |
| B. | decoder |
| C. | data selector |
| D. | multivibrator |
| Answer» D. multivibrator | |
| 47. |
What is the main advantage of using MOSFET rather than bipolar transistor circuitary in ICs? |
| A. | much greater complexity (more components) than bipolar circuits : better economy |
| B. | higher operating speed than bipolar circuits |
| C. | fewer power supply connections are required with MOS ICs |
| D. | system designers are more familiar with MOS circuitary |
| Answer» B. higher operating speed than bipolar circuits | |
| 48. |
Conversion of an octal number 1258 to its decimal number is |
| A. | 9010 |
| B. | 8510 |
| C. | 8710 |
| D. | 9910 |
| Answer» C. 8710 | |
| 49. |
A preliminary guide for comparing the simplicity of logic circuits is to count the number of input _____ leads. |
| A. | wire |
| B. | bus |
| C. | gate |
| D. | All of the above |
| Answer» D. All of the above | |
| 50. |
An AND gate has 7 inputs. How many input word are in its truth table? |
| A. | 64 |
| B. | 32 |
| C. | 16 |
| D. | 128 |
| Answer» E. | |