MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How can the active condition (HIGH or LOW) or the decoder output be determined from the logic symbol? |
| A. | A bubble indicates active-HIGH |
| B. | A bubble indicates active-LOW |
| C. | A triangle indicates active-HIGH |
| D. | A triangle indicates active-LOW |
| Answer» C. A triangle indicates active-HIGH | |
| 2. |
A truth table with output columns numbered 0–15 may be for which type of decoder IC? |
| A. | Hexadecimal 1-of-16 |
| B. | Dual octal outputs |
| C. | Binary-to-hexadecimal |
| D. | Hexadecimal-to-binary |
| Answer» B. Dual octal outputs | |
| 3. |
How many inputs are required for a 1-of-16 decoder? |
| A. | 2 |
| B. | 16 |
| C. | 8 |
| D. | 4 |
| Answer» E. | |
| 4. |
Which is the way to convert BCD to binary using the hardware approach? |
| A. | By using MSI IC circuits |
| B. | By using a keyboard encoder |
| C. | By using an ALU |
| D. | By using UART |
| Answer» B. By using a keyboard encoder | |
| 5. |
How many possible outputs would a decoder have with a 6-bit binary input? |
| A. | 32 |
| B. | 64 |
| C. | 128 |
| D. | 16 |
| Answer» D. 16 | |
| 6. |
A BCD decoder will have how many rows in its truth table? |
| A. | 10 |
| B. | 9 |
| C. | 8 |
| D. | 3 |
| Answer» B. 9 | |
| 7. |
What control signals may be necessary to operate a 1-line-to-16 line decoder? |
| A. | Flasher circuit control signal |
| B. | A LOW on all gate enable inputs |
| C. | Input from a hexadecimal counter |
| D. | A HIGH on all gate enable circuits |
| Answer» C. Input from a hexadecimal counter | |
| 8. |
Which digital system translates coded characters into a more useful form? |
| A. | Encoder |
| B. | Display |
| C. | Counter |
| D. | Decoder |
| Answer» E. | |
| 9. |
How many outputs are present in a BCD decoder? |
| A. | 4 |
| B. | 5 |
| C. | 15 |
| D. | 10 |
| Answer» E. | |