| 71. | What is the maximum counting speed of a 4-bit binary counter which is composed of Flip-Flop with a propagation delay of 25ns? |
| a. | 1 MHz |
| b. | 10 MHz |
| c. | 100 MHz |
| d. | 4 MHz |
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Answer: (b).10 MHz
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| 72. | The hexadecimal equivalent of (10111)2 × (1110)2 is: |
| a. | 150 |
| b. | 241 |
| c. | 142 |
| d. | 101011110 |
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Answer: (c).142
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| 73. | An example of a self complementing code is: |
| a. | 8421 code |
| b. | Gray code |
| c. | Excess-3 code |
| d. | 7421 code |
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|
Answer: (c).Excess-3 code
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| 74. | A sum of products expression can be implemented with...............logic gates. |
| a. | AND – OR |
| b. | NAND − OR |
| c. | AND – NOT |
| d. | OR – AND |
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Answer: (a).AND – OR
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| 75. | The number of 1’s present in the binary representation of (3x512 + 7x64 + 5x8 + 3)10 is: |
| a. | 8 |
| b. | 9 |
| c. | 10 |
| d. | 11 |
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|
Answer: (b).9
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| 76. | Which of the following expression removes static hazard from a two level AND-OR gate implementation of xy + zx’ ? |
| a. | xy + zx’ |
| b. | xy + zx’ + wyz |
| c. | xy + zx’ + yz |
| d. | xy + zx’ + wz |
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Answer: (c).xy + zx’ + yz
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| 77. | In a weighted code with weight 6, 4, 2 ,-3 the decimal 5 is represented by: |
| a. | 0101 |
| b. | 0111 |
| c. | 1011 |
| d. | 1000 |
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Answer: (c).1011
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| 78. | Upto how many variables, can the Karnaugh map be used ? |
| a. | 3 |
| b. | 4 |
| c. | 5 |
| d. | 6 |
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Answer: (d).6
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| 79. | Which of the following is divisible by 4? |
| a. | 100101100 |
| b. | 1110001110001 |
| c. | 11110011 |
| d. | 10101010101010 |
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Answer: (a).100101100
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| 80. | (101011)2 = (53)b, then b is equal to: |
| a. | 4 |
| b. | 8 |
| c. | 10 |
| d. | 16 |
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Answer: (b).8
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