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Digital Computer Electronics - Section 1 Multiple Questions and Answers.
| 26. | Adders: | ||
| A. | adds 2 bits | ||
| B. | needs two input and generates two outpu | ||
| C. | is called so because a full adder involves two half-adders | ||
| D. | All of these | ||
| 28. | An AND circuit: | ||
| A. | is a memory circuit | ||
| B. | gives an output when all input signals are present simultaneously | ||
| C. | is a -ve OR gate | ||
| D. | is a linear circuit | ||
| 29. | Which of the following adders can add three or more numbers at a time ? | ||
| A. | Parallel adder | ||
| B. | Carry-look-ahead adder | ||
| C. | Carry-save-adder | ||
| D. | Full adder | ||
| 30. | Which one of the following logic expression is incorrect? | ||
| A. | 1 ⊕ 0 = 1 | ||
| B. | 1 ⊕ 1 ⊕ 0 = 1 | ||
| C. | 1 ⊕ 1 ⊕ 1 = 1 | ||
| D. | 1 ⊕ 1 = 0 | ||
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