MCQOPTIONS
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MCQOPTIONS
This section includes 239 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
How many BCD code bits and how many straight binary bits would be required to represent the decimal number 643? |
| A. | 12 BCD, 12 binary |
| B. | 12 BCD, 10 binary |
| C. | 12 BCD, 9 binary |
| D. | 16 BCD, 9 binary |
| Answer» C. 12 BCD, 9 binary | |
| 152. |
The decimal number 188 is equal to the binary number ________. |
| A. | 10111100 |
| B. | 111000 |
| C. | 1100011 |
| D. | 1111000 |
| Answer» B. 111000 | |
| 153. |
The binary-coded decimal (BCD) system can be used to represent each of the 10 decimal digits as a(n): |
| A. | 4-bit binary code |
| B. | 8-bit binary code |
| C. | 16-bit binary code |
| D. | ASCII code |
| Answer» B. 8-bit binary code | |
| 154. |
Hexadecimal F2 is ________ in binary. |
| A. | 11100011 |
| B. | 10100001 |
| C. | 11110010 |
| D. | 11111100 |
| Answer» D. 11111100 | |
| 155. |
Most computers store binary data in groups of 32 bits called Dwords. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» C. 1 | |
| 156. |
Convert the binary number 1011010 to hexadecimal. |
| A. | 5B |
| B. | 5F |
| C. | 5A |
| D. | 5C |
| Answer» D. 5C | |
| 157. |
The BCD number for decimal 16 is ________. |
| A. | 10110 |
| B. | 10000 |
| C. | 10010 |
| D. | 11100000 |
| Answer» B. 10000 | |
| 158. |
Which of the following is an invalid BCD code? |
| A. | 11 |
| B. | 1101 |
| C. | 101 |
| D. | 1001 |
| Answer» C. 101 | |
| 159. |
The 2's complement of 11100111 is ________. |
| A. | 11100110 |
| B. | 11001 |
| C. | 11000 |
| D. | 11010 |
| Answer» C. 11000 | |
| 160. |
Convert the following BCD number to decimal.100000000011bcd |
| A. | 8003 |
| B. | 803 |
| C. | 1003 |
| D. | 103 |
| Answer» C. 1003 | |
| 161. |
Whenever information is transmitted from one device to another, there is a possibility that ________. |
| A. | one device is off |
| B. | errors will occur |
| C. | there is a full moon |
| D. | the data will be received as transmitted |
| Answer» C. there is a full moon | |
| 162. |
Convert the following decimal number to hexadecimal.74 |
| A. | A416 |
| B. | B416 |
| C. | 4A16 |
| D. | 4B16 |
| Answer» D. 4B16 | |
| 163. |
Hexadecimal 16 is ________ in decimal. |
| A. | 3210 |
| B. | 2210 |
| C. | 2510 |
| D. | 2710 |
| Answer» C. 2510 | |
| 164. |
Convert the following octal number to decimal. 178 |
| A. | 51 |
| B. | 82 |
| C. | 57 |
| D. | 15 |
| Answer» E. | |
| 165. |
Assign the proper even parity bit to the code 1100001. |
| A. | 11100001 |
| B. | 1100001 |
| C. | 1100001 |
| D. | 1110101 |
| Answer» B. 1100001 | |
| 166. |
The binary number 11101011000111010 can be written in hexadecimal as ________. |
| A. | DD63A16 |
| B. | 1D63A16 |
| C. | 1D33A16 |
| D. | 1D63116 |
| Answer» C. 1D33A16 | |
| 167. |
The binary number 1110 is equal to the decimal number ________. |
| A. | 3 |
| B. | 1 |
| C. | 7 |
| D. | 14 |
| Answer» E. | |
| 168. |
Adding an odd-parity bit to ASCII hex code 2B results in 10101011. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 169. |
Convert the following hexadecimal number to binary. 14B16 |
| A. | 1011010000000 |
| B. | 1010010112 |
| C. | 1010011012 |
| D. | 1101010000000 |
| Answer» C. 1010011012 | |
| 170. |
If a typical PC uses a 20-bit address code, how much memory can the CPU address? |
| A. | 20 MB |
| B. | 10 MB |
| C. | 1 MB |
| D. | 580 MB |
| Answer» D. 580 MB | |
| 171. |
Convert the following decimal number to octal.281 |
| A. | 1348 |
| B. | 4318 |
| C. | 3318 |
| D. | 1338 |
| Answer» C. 3318 | |
| 172. |
Convert binary 1001 to hexadecimal. |
| A. | 916 |
| B. | 1116 |
| C. | 10116 |
| D. | 1016 |
| Answer» B. 1116 | |
| 173. |
What is the resultant binary of the decimal problem 49 + 01 = ? |
| A. | 1010101 |
| B. | 110101 |
| C. | 110010 |
| D. | 110001 |
| Answer» D. 110001 | |
| 174. |
Which of the following is the most widely used alphanumeric code for computer input and output? |
| A. | Gray |
| B. | ASCII |
| C. | Parity |
| D. | EBCDIC |
| Answer» C. Parity | |
| 175. |
Hex is often used in digital applications as a shorthand way to represent strings of bits. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 176. |
Most computers store data in strings of ________ bits called a ________. |
| A. | 8, word |
| B. | 8, byte |
| C. | 16, word |
| D. | 16, byte |
| Answer» C. 16, word | |
| 177. |
Binary-coded-decimal numbers use only binary numbers between 0000 and 1001. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 178. |
Convert binary 11001111 to hexadecimal. |
| A. | 8F16 |
| B. | CE16 |
| C. | DF16 |
| D. | CF16 |
| Answer» E. | |
| 179. |
Convert 45710 to hexadecimal. |
| A. | 711 |
| B. | 2C7 |
| C. | 811 |
| D. | 1C9 |
| Answer» E. | |
| 180. |
Convert 110010012 (binary) to decimal. |
| A. | 201 |
| B. | 2001 |
| C. | 20 |
| D. | 210 |
| Answer» B. 2001 | |
| 181. |
The BCD number for decimal 347 is ________. |
| A. | 1100 1011 1000 |
| B. | 0011 0100 0111 |
| C. | 0011 0100 0001 |
| D. | 1100 1011 0110 |
| Answer» C. 0011 0100 0001 | |
| 182. |
Which of the following is the primary advantage of using the BCD code instead of straight binary coding? |
| A. | Fewer bits are required to represent a decimal number with the BCD code. |
| B. | The relative ease of converting to and from decimal. |
| C. | BCD codes are easily converted to hexadecimal codes. |
| D. | BCD codes are easily converted to straight binary codes. |
| Answer» C. BCD codes are easily converted to hexadecimal codes. | |
| 183. |
3428 is the decimal value for which of the following binary-coded decimal (BCD) groupings? |
| A. | 11010000000000 |
| B. | 11010000000000 |
| C. | 11010000000000 |
| D. | 110100000000000 |
| Answer» C. 11010000000000 | |
| 184. |
Hexadecimal is used to encode BCD numbers. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» C. 1 | |
| 185. |
The sum of the two BCD numbers, 0011 + 0011, is ________. |
| A. | 110 |
| B. | 111 |
| C. | 11 |
| D. | 1100 |
| Answer» B. 111 | |
| 186. |
Alphanumeric codes should include as a minimum: |
| A. | the capacity to represent the alphabet upper- and lowercase characters and the decimal numbers in a straight binary format. |
| B. | the capacity to code all possible decimal numbers in a direct octal representation of BCD codes. |
| C. | the alphabet upper- and lowercase letters, the decimal digits, the seven punctuation marks, and other characters or symbols. |
| D. | the ability to represent decimal numbers greater than 12810 in a straight binary format. |
| Answer» D. the ability to represent decimal numbers greater than 12810 in a straight binary format. | |
| 187. |
1510 = 11112 = F16 = 00010101 BCD |
| A. | 1 |
| B. | |
| Answer» B. | |
| 188. |
The 1's complement of 10011101 is ________. |
| A. | 1100010 |
| B. | 10011110 |
| C. | 1100001 |
| D. | 1100011 |
| Answer» B. 10011110 | |
| 189. |
Convert the following BCD number to decimal.010101101001bcd |
| A. | 539 |
| B. | 2551 |
| C. | 569 |
| D. | 1552 |
| Answer» D. 1552 | |
| 190. |
Binary-coded-decimal 0111 1001 0011 is ________ in binary. |
| A. | 11110010011 |
| B. | 10110101111 |
| C. | 1100110011 |
| D. | 1100011001 |
| Answer» E. | |
| 191. |
Hex 4B5258 is ________ in ASCII code. |
| A. | FGM |
| B. | KLM |
| C. | KRX |
| D. | JQW |
| Answer» D. JQW | |
| 192. |
Convert the following decimal number to hexadecimal.125 |
| A. | 7D16 |
| B. | D716 |
| C. | 7C16 |
| D. | C716 |
| Answer» B. D716 | |
| 193. |
Convert the following binary number to octal. 0101111002 |
| A. | 1728 |
| B. | 2728 |
| C. | 1748 |
| D. | 2748 |
| Answer» E. | |
| 194. |
A decimal number is converted to BCD by replacing each decimal digit with the appropriate 3-bit binary code. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 195. |
Digital electronics is based on the ________ numbering system. |
| A. | decimal |
| B. | octal |
| C. | binary |
| D. | hexadecimal |
| Answer» D. hexadecimal | |
| 196. |
The binary number 101110101111010 can be written in octal as ________. |
| A. | 515628 |
| B. | 565778 |
| C. | 656278 |
| D. | 565728 |
| Answer» E. | |
| 197. |
The American Standard Code for Information Interchange (ASCII) uses how many individual pulses for any given character? |
| A. | 1 |
| B. | 2 |
| C. | 7 |
| D. | 8 |
| Answer» D. 8 | |
| 198. |
3 √ó 101 + 7 √ó 100 is equal to ________. |
| A. | 3.7 |
| B. | 37 |
| C. | 10 |
| D. | 370 |
| Answer» C. 10 | |
| 199. |
Convert the following hexadecimal number to binary.C916 |
| A. | 101110012 |
| B. | 101110112 |
| C. | 100111002 |
| D. | 110010012 |
| Answer» E. | |
| 200. |
When using even parity, where is the parity bit placed? |
| A. | Before the MSB |
| B. | After the LSB |
| C. | In the parity word |
| D. | After the odd parity bit |
| Answer» B. After the LSB | |