-
০০।
- ক) The device is working properly.
- 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) ________.
- ক) AND gate
- খ) OR gate
- গ) NAND gate
- ঘ) XOR gate