Recent questions tagged goclasses-digital-logics-practice-questions

The output $Y$ in the circuit below is always '$1$' whenA. two or more of the inputs $P, Q, R$ are '$0$'B. two or more of the inputs $P, Q, R$ are '$1$'C. any odd number ...

Decimal 43 in Hexadecimal and BCD number system is respectivelyA. B2, $0100$ $0011$B. 2B, $0100$ $0011$C. 2B, $0011$ $0100$D. B2, $0100$ $0100$

The complete set of only those Logic Gates designated as Universal Gates isA. NOT, OR and AND GatesB. XNOR, NOR and NAND GatesC. NOR and NAND GatesD. XOR, NOR and NAND Ga...

$A(4 \times 1) M U X$ is used to implement a 3-input Boolean function as shown in the figure. The Boolean function $F(A, B, C)$ implemented isA. $F(A, B, C)=\Sigma(1,2,4,...

Which of the following 6-bit 2's complement operations result in overflow?A. $001110+110010$B. $111001+001010$C. $010101 - 100111$D. $101011-100110$

For the ring oscillator shown in figure, the propagation delay of each inverter is $100$ pico second. What is the fundamental frequency of the oscillator output?$10$ MHz$...

Without any additional circuitry, an $8:1$ MUX can be used to obtainsome but not all Boolean functions of $3$ variablesall functions of $3$ variables but none of $4$ vari...

The minimum number of 2-input NAND gates required to implement a 2-input XOR gate is$4$$5$$6$$7$

The $2 's$ complement representation of $-17$ is$101110$$101111$$111110$$110001$

The digital circuit shown in the figure works asJK flip-flopClocked RS flip-flopT flip-flopRing counter

The shift register shown in figure is initially loaded with the bit pattern $1010$. Subsequently the shift register is clocked, and with each clock pulse the pattern gets...

In the logic circuit shown in the figure, $Y$ is given by$Y=A B C D$ $Y=(A+B)(C+D)$ $Y=A+B+C+D$ $Y=A B+C D$

The output $Y$ of a $2$ -bit comparator is logic $1$ whenever the $2$ -bit input $A$ is greater than the $2$ -bit input $B$ . The number of combinations for which the out...

For a Boolean function of $n=4$ variables, calculate the sum of the following:Total number of Boolean functions possibleNumber of neutral functionsNumber of self-dual fun...

Consider the Boolean expression:$$f(A, B, C)=A B C+A^{\prime} B^{\prime} C+A^{\prime} B C+A B C^{\prime}+A^{\prime} B^{\prime} C^{\prime}$$What is the total number of lit...

A 3-bit gray counter is used to control the output of the multiplexer as shown in the figure. The initial state of the counter is $000_2$. The output is pulled high. The ...

Which of the following are self-complemented codes?A. Excess-$3$ (XS-$3$) CodeB. $2421$ CodeC. $8421$ (BCD) CodeD. $84-2-1$ Code

Which of the following $6$-bit $2$'s complement operations do NOT result in overflow?$010101+000011$ $101011+111000$ $001010-111001$ $111001-001010$

A $3 \times 8$ decoder is enabled and takes inputs a (MSB), b, and c (LSB). Which of the following Boolean expressions represents the output of the OR gate? $a b^{\prime}...

Consider five seats numbered $0$ to $4$ , arranged in a circle. Each seat is described by a Boolean variable $i_0$ to $i_4$, where $i_k$ is 1 if seat $k$ is occupied and ...