List of practice Questions

What is the frequency of the waveform at Y? 
frequency of the waveform at Y
Which is the Hexadecimal equivalent of \( 1100101011101011_2 \)?
The basic step of an 8-bit DAC is 12.4 mV. If the binary input \( 00000000 \) represents 0V, determine the output if the input is \( 10110111 \).
Which IC is a fixed positive voltage regulator?
Which is the correct option for the circuit shown below to get an output \( V_o \) as \( -V_{cc} \)? 
Vref < Vin
What is the output voltage \( V_o \) for the circuit shown below? 
output voltage Vo for the circuit

Which port in 8051 microcontroller requires external pull-up as shown below? 
8051 microcontroller

The instruction XLAT in 8086 microprocessor is used to
In 8085 microprocessor, two address lines namely A13 and A6 have become faulty and are stuck at logic 0. Which of the following address locations cannot be accessed in the memory?
For the given 8086 microprocessor instructions below, which of the following is an invalid instruction?
Consider a system output \( y(t) \) is related to its input \( x(t) \) as, \( y(t) = x(t) + \cos (x(t)) \). This system is
A continuous system is described by \( y(t) = x(t) \cos(200 \pi t) \). If \( x(t) \) is a two-tone signal with frequencies 25 Hz and 50 Hz, then the frequency components present in \( y(t) \) will be
Let a discrete time signal \( x(n) \) has Z-transform \( X(z) = \frac{1}{1+2 z^{-1}}, |z|>2 \). If its Fourier transform is denoted as \( X(e^{j\omega}) \), then
A single-tone real signal \( x[n] \) has its 8-point DFT denoted by \( X(k) \) which has \( X(2) = 2 \). Then, the signal \( x[n] \) will be equal to
The number of stages in radix-2 DIT FFT for \( N = 8 \) is
The minimum number of delay elements and multipliers required to implement a linear phase filter with impulse response \( h(n) \) defined for \( 0<n<8 \) are
In 1024-point DFT of a signal sampled at 8192 Hz, \( k = 8 \) corresponds to a frequency of
The width of the transition band of a linear phase band-pass FIR filter is given as \( 0.1 \pi \). The order of the filter designed using Blackman window is
Use Mason’s gain formula to find the transfer function of the given figure 
Mason’s gain formula to find the transfer function
The transfer function of the system is \( G(s) = \frac{100}{(s + 1)(s + 100)} \). For a unit step input, the approximate settling time for the 2 percent criterion is
The range of \( K \) for the stability of the system is \( 0<K<100 \). For \( K = 10 \), the gain margin of the system is
A Bode magnitude plot for the transfer function \( G(s) \) of a plant is shown below. Which one of the following transfer functions best describes the plant? 
A Bode magnitude plot for the transfer function G(s)
Which of the following techniques requires timing synchronization between transmitter and receiver?
If a uniform quantizer with sinusoidal input signal produces the output SNR of 43.76 dB, determine the number of quantization levels used.
An AM modulator develops an unmodulated power of 400 W and power of 450 W when modulated with modulation index \( \mu \) across the resistive load. Then the value of \( \mu \) is