Q. A half adder can be used only for adding

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Q. In the 8421 BCD code, the decimal number 125, is written as

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Q. 110.11₂ x 110₂ = __________ ₁₀

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Q. Y = A + A̅ B is the same as

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Q. Assertion (A): Different symbols are used for different gates

Reason (R): IEEE symbols are the same as traditional symbols for gates.

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Q. If an analog voltage is expressed in binary using 4 bits, each successive binary count would represent

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Q. In a 4 input AND gate, the total number of High outputs for 16 input states are

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Q. Symmetrical square wave of time period 100 μs can be obtained from square wave of time period 10 μs by using

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Q. The initial state of a Mod-16 counter is 0110. After 37 clock pulses the state of counter will be

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Q. In a 5 x 7 dot matrix, format, to store 64 alphanumeric characters we require

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Q. A digital system is required to amplify a binary encoded audio signal. The user should be able to control the gain of the amplifier from a minimum to a maximum in 100 increments. The minimum number of bits required to encode, in straight binary is,

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Q. A 4 bit transistor register has output voltage of high-low-high-low. The binary number stored and its decimal equivalent are

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Q. Assertion (A): A demultiplexer cannot be used as a decoder

Reason (R): A multiplexer selects one of many outputs whereas a decoder selects on output corresponding to coded input.

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Q. Hexadecimal number F is called to octal number

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Q. A 4 bit ripple counter is in 0000 state. The clock pulses are applied and then removed. The counter reads 0011. The number of clock pulses which have occurred are

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Q. TTL logic is preferred to DRL logic because

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Q. Assertion (A): Schottky transistors are preferred over normal transistors in digital circuits

Reason (R): A Schottky transistor when used as a switch, between cutoff and active region.

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Q. A 4 bit synchronous counter uses flip flops with a delay time of 15 ns each. The time required for change of state is

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Q. What do the contents of instruction register specify?

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Q. In the decimal number 27, the digital 2 represents

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