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Questions on dgital electronics and circuits
I applied via Campus Placement and was interviewed in Jan 2023. There were 3 interview rounds.
Given all king of aptitude part
Bode plot for CS amplifier shows gain and phase response with frequency.
Bode plot consists of two plots - one for gain (in dB) and one for phase shift (in degrees) vs frequency.
The gain plot typically shows a high-pass filter response with a peak at the resonant frequency.
The phase plot shows a 180 degree phase shift at the resonant frequency.
Bode plots are useful for analyzing frequency response of amplifiers and filt
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I applied via Campus Placement
I was interviewed in Sep 2017.
Overlap-add is implemented by dividing the input signal into overlapping segments, applying a window function, and adding the segments together.
Overlap-add is a method used in digital signal processing to efficiently convolve long signals with finite impulse response (FIR) filters.
The input signal is divided into overlapping segments, typically with a length equal to the filter length.
A window function, such as the Ham...
The Nyquist criterion states that in order to accurately sample a signal, the sampling rate must be at least twice the highest frequency component of the signal.
The Nyquist criterion is used in digital signal processing to prevent aliasing.
It ensures that the sampling rate is sufficient to capture all the information in the signal.
The criterion is based on the concept of the Nyquist frequency, which is half the samplin...
Demodulating a QAM signal involves separating the amplitude and phase components to recover the original data.
QAM signals combine amplitude and phase modulation
Demodulation involves separating the amplitude and phase components
Techniques like coherent demodulation and quadrature demodulation are used
Coherent demodulation uses a local oscillator to recover the phase component
Quadrature demodulation separates the in-phas
Interpolation in discrete-time domain involves estimating values between known data points.
Interpolation is used to fill in missing data or estimate values between known data points.
Common interpolation methods include linear interpolation, polynomial interpolation, and spline interpolation.
Linear interpolation calculates values by drawing a straight line between two adjacent data points.
Polynomial interpolation uses a...
Yes, I would take the intern in Hyderabad to mentor and guide them in their learning journey.
Taking an intern can provide an opportunity to mentor and guide a budding engineer.
It can also help in delegating tasks and projects, allowing for more productivity.
Having an intern can bring fresh perspectives and ideas to the team.
Interns can also assist in research and development projects, aiding in innovation.
Supervising a...
posted on 18 Sep 2017
I was interviewed in Sep 2017.
Overlap-add method of convolution is implemented by dividing the input signal into overlapping segments and convolving each segment with a filter.
Divide the input signal into overlapping segments
Apply the filter to each segment
Add the convolved segments together to get the output signal
The length of each segment should be greater than or equal to the length of the filter
The overlap between adjacent segments should be g...
The Nyquist criterion states that in order to accurately sample a signal, the sampling rate must be at least twice the highest frequency component of the signal.
The Nyquist criterion is used in digital signal processing and communication systems.
It ensures that the original signal can be accurately reconstructed from its samples.
The sampling rate should be at least twice the bandwidth of the signal to avoid aliasing.
Fo...
Nyquist sampling frequency for unevenly distributed band-limited signal.
Determine the highest frequency component in the signal
Use Nyquist theorem to calculate the minimum sampling frequency
Sampling frequency should be at least twice the highest frequency component
Interpolation in discrete-time domain involves estimating values between known data points.
Interpolation is used to fill in missing data or estimate values between known data points.
Common interpolation techniques include linear interpolation, polynomial interpolation, and spline interpolation.
Linear interpolation calculates values along a straight line between two known data points.
Polynomial interpolation uses a poly...
The in-phase and quadrature components of a real pass-band signal can be obtained using a complex mixer.
A complex mixer is used to convert the real pass-band signal to a complex baseband signal.
The in-phase component is obtained by multiplying the pass-band signal with a local oscillator signal in-phase with the carrier frequency.
The quadrature component is obtained by multiplying the pass-band signal with a local osci...
The number of ways to arrange sets of coloured balls in a line.
The number of ways to arrange the red balls is the factorial of the number of red balls.
The number of ways to arrange the blue balls is the factorial of the number of blue balls.
The number of ways to arrange the green balls is the factorial of the number of green balls.
To find the total number of arrangements, multiply the number of arrangements for each se
The bit-rate for quantization of a band-limited signal can be obtained by considering the Nyquist-Shannon sampling theorem.
The Nyquist-Shannon sampling theorem states that in order to accurately represent a band-limited signal, the sampling rate must be at least twice the highest frequency component of the signal.
The bit-rate for quantization is determined by the number of bits used to represent each sample. It is typi...
Yes, I would take the intern in Communications in Hyderabad.
Taking the intern in Communications in Hyderabad would provide me with valuable experience in a different field.
It would allow me to expand my skill set and network in a new location.
Internships are great opportunities for learning and growth, regardless of the specific field.
Aptitude, Digital Electronics.
I applied via Campus Placement and was interviewed before Oct 2021. There were 3 interview rounds.
Based on Electronics, Aptitude and Software
D flip flop is a digital circuit that stores a single bit of data and is used in sequential logic circuits.
D flip flop has a data input (D), a clock input (CLK), a set input (S), and a reset input (R).
When the clock input is high, the value of D is transferred to the output Q.
When the set input is high, the output Q is set to high.
When the reset input is high, the output Q is reset to low.
D flip flop is used in applica...
Factorial can be found using a loop or recursion in C programming language.
Use a loop to multiply the numbers from 1 to n to find the factorial of n.
Use recursion to call the function itself with n-1 until n=1.
Handle edge cases such as negative numbers and 0.
Example: int factorial(int n) { if(n<=1) return 1; return n*factorial(n-1); }
Example: int factorial(int n) { int fact=1; for(int i=1;i<=n;i++) fact*=i; return fact
To find duplicates in a string, we can use a hash table to keep track of the frequency of each character.
Iterate through the string and add each character to the hash table with its frequency
If a character already exists in the hash table, it is a duplicate
Return a list of all the duplicate characters found
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