Electronics and Communication Engineering - Digital Electronics
Exercise :: Digital Electronics - Section 19
| 31. |
Which material is generally used for LED? |
| A. |
Compounds of silica | | B. |
Compounds of gallium | | C. |
Compounds of phosphorus | | D. |
Compounds of sulphur |
Answer: Option B
Explanation:
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| 32. |
The counter shown in the given figure is
 |
| A. |
Synchronous | | B. |
Johnson | | C. |
Ring | | D. |
None of the above |
Answer: Option D
Explanation:
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| 33. |
The number of bits in a nibble is |
Answer: Option B
Explanation:
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| 34. |
When all the seven segments of a display are energized, the number shown is |
Answer: Option D
Explanation:
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| 35. |
In digital computer programming, subroutines are used |
| A. |
to reduce program execution time at the expense of more memory | | B. |
to reduce storage requirements | | C. |
to increase programming ease and reduce storage requirements | | D. |
because most of the functions are same |
Answer: Option C
Explanation:
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