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Shopping Zone Tv Interview Questions and Answers
Q1. Are all heterocyclic compounds aromatic?
No, not all heterocyclic compounds are aromatic.
Aromaticity depends on the presence of a conjugated ring of atoms with a certain number of pi electrons.
Heterocyclic compounds may or may not have this conjugated ring structure.
Examples of non-aromatic heterocyclic compounds include pyridine N-oxide and pyrrole.
Examples of aromatic heterocyclic compounds include pyridine and furan.
Q2. What is fft and explain its significance?
FFT stands for Fast Fourier Transform. It is a mathematical algorithm used to transform time-domain signals into frequency-domain signals.
FFT is used in signal processing to analyze and filter signals.
It is used in audio and image compression.
It is also used in solving differential equations and in cryptography.
FFT is significant because it allows for efficient analysis of signals in the frequency domain.
It is faster than the traditional Fourier transform algorithm.
FFT is wid...read more
Q3. Define convolution & xplain its importance
Convolution is a mathematical operation that combines two functions to produce a third function.
It is used in signal processing to extract features from signals.
It is used in image processing for tasks such as edge detection and blurring.
It is used in machine learning for tasks such as image recognition and natural language processing.
It is important in physics for solving differential equations.
It is used in audio processing for tasks such as reverb and echo effects.
Q4. Is fft a transform by it self?
Yes, FFT is a transform by itself.
FFT stands for Fast Fourier Transform
It is a mathematical algorithm used to transform a signal from time domain to frequency domain
FFT is a standalone transform and can be used for various applications such as signal processing, image processing, and data compression
Q5. bjt regions & its operation as a switch
BJT has three regions: emitter, base, and collector. It operates as a switch by controlling the base current.
BJT has two modes of operation: active mode and cutoff mode
In active mode, the base-emitter junction is forward-biased and the collector-emitter junction is reverse-biased
In cutoff mode, both junctions are reverse-biased
To use BJT as a switch, it is operated in either active or cutoff mode
By controlling the base current, the BJT can be switched between the two modes
Q6. OFDMA and its applications
OFDMA is a multiple access technique used in wireless communication systems.
OFDMA stands for Orthogonal Frequency Division Multiple Access.
It allows multiple users to transmit data simultaneously over the same frequency band.
OFDMA is used in 4G and 5G cellular networks, WiMAX, and other wireless communication systems.
It improves spectral efficiency and reduces interference.
OFDMA divides a channel into multiple subcarriers and assigns them to different users.
Each subcarrier ca...read more
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