খ) For the input conditions shown the output should be LOW; the input is shorted to ground.
গ) For the input conditions shown the output should be neither HIGH nor LOW; the device is shorted to .
ঘ) The device is probably alright; the problem is most likely caused by the stage connected to the output of the device.
০১।
ক) 10011110
খ) 01211110
গ) 000100000100
ঘ) 001000001000
০২। is in the form of a sum-of-products expression.
ক) True
খ) False
০৩। –910 represented in eight-bit two's-complement notation is ________.
ক) 11110111
খ) 11111001
গ) 11110110
ঘ) 01111101
০৪। 1/4 as a binary number would be ________.
ক) 0.01
খ) 0.11
গ) 0.10
ঘ) 0.00
০৫। 10011100 in two's-complement notation has a decimal value of –100.
ক) True
খ) False
০৬। 111010002 is the 2's-complement representation of –24.
ক) True
খ) False
০৭। 1210 = 11012 = C16 = 00010010 BCD
ক) True
খ) False
০৮। 1510 = 11112 = F16 = 00010101 BCD
ক) True
খ) False
০৯। 3 × 101 + 7 × 100 is equal to ________.
ক) 3.7
খ) 37
গ) 10
ঘ) 370
১০। 3428 is the decimal value for which of the following binary-coded decimal (BCD) groupings?
ক) 11010001001000
খ) 11010000101000
গ) 011010010000010
ঘ) 110100001101010
১১। 34FC + AD31 = ________.
ক) E22D
খ) E31D
গ) E21D
ঘ) E42D
১২। 3C1D16 = 111100000111012
ক) True
খ) False
১৩। A "floating" TTL input may be defined as:
ক) unused input that is tied to Vcc through a 1 k resistor.
খ) unused input that is tied to used inputs.
গ) unused input that is tied to the ground.
ঘ) unused input that is not connected.
১৪। A 0.01-F capacitor is recommended by TTL manufacturers for ________ the power supply.
ক) decoupling
খ) filtering
গ) rectifying
ঘ) grounding
১৫। A 0.3-F capacitor has an initial charge of 2.7 V. If it is discharged through a 10-k resistor for 6.5 ms, how much voltage will be left across the capacitor?
ক) 0.0 V
খ) 0.309 V
গ) 2.7 V
ঘ) 2.295 V
১৬। A 1-of-8 octal decoder has eight outputs and decodes an input of ________ bit(s).
ক) three
খ) two
গ) four
ঘ) one
১৭। A 12 MHz clock frequency is applied to a cascaded counter containing a modulus-5 counter, a modulus-8 counter, and a modulus-10 counter. The lowest output frequency possible is ________.
ক) 10 kHz
খ) 20 kHz
গ) 30 kHz
ঘ) 60 kHz
১৮। A 16-input multiplexer is to be used to perform parallel-to-serial data conversion. Which of the following counters would be required to provide the data select inputs?
ক) MOD 8
খ) MOD 16
গ) MOD 4
ঘ) MOD 2
১৯। A 2-input gate that can be used to pass a digital waveform unchanged at certain times and inverted at other times is a(n) ________.