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Electronics and Communication Engineering - Digital Electronics

Exercise : Digital Electronics - Section 19
26.
If the switch is thrown to the START position, Q and Y will be equal to
Q = 0, Y = 0
Q= 1, Y= 1
Q = 1, Y = CLK
Q = 0, Y = CLK
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
The hexadecimal number system is
widely used in analyzing and programming microprocessors
an obsolete system no more in use
used in calculators only
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Mark the false statement:
since wave-shape of a digital signal is unimportant, linear amplifiers are not required
the precise amplitude of a digital signal is also unimportant provided two voltage levels (0 and 1) are quite different
the leading and trailing edges of a digital signal need not be sharp
actual digital waves have rise and fall times of the order of a few nano seconds
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The stack is a specialized temporary __________ access memory during __________ and __________ instructions.
The 8156 of a figure has RAM locations from 2000 H to 20 FFH.
random, store, load
random, push, load
sequential, store, pop
sequential, push, pop
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
The 54/74164 chip is an 8-bit serial-input-parallel-output shift register. The clock is 1 MHz. The time needed to shift a 8-bit binary number into the chip is
1 μs
2 μs
8 μs
16 μs
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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