Match the eqivalent correct column that produces the same answer Increase the variable xval by 1 v Decrease the variable xval by 1 A. xval = a + (2 * b); B. xval++; v Assign to xval the result of dividing the sum of a and b by the product C. xval = b%c: of c and d. D. xval = (a + b) / (c* d); Assign to xval the result of a plus twice b to c E. --xval; Assign the remainder of b divided by c to xval. A Moving to another question will save this response.

Match the eqivalent correct column that produces the same answer Increase the variable xval by 1 v Decrease the variable xval by 1 A. xval = a + (2 * b); B. xval++; v Assign to xval the result of dividing the sum of a and b by the product C. xval = b%c: of c and d. D. xval = (a + b) / (c* d); Assign to xval the result of a plus twice b to c E. --xval; Assign the remainder of b divided by c to xval. A Moving to another question will save this response.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Please read codes which are wrote byMatlab.clear;close all;Fs = 4000; % sampling frequencyT = 1/Fs; %L = 1000; %frequency lengtht = (0:L-1)*T;y = 0.7*cos(2*pi*25+t) + 2*cos(2*pi*24*t) + cos(2*pi*120*t);NEFT = 2^nextpow2(L); %, The term circle is rounded to the nthpower of 2Y = fft(y,NFFT)/L;f = Fs/2*linspace(0.1, NFFT/2+1);plot(f,2*abs(Y(1:NFFT/2+1)))title('Unilateral amplitude spectrum)xlabel('Freq (Hz)')ylabel('|Y(f)|') Questions:A. What is the overall purpose of these code? B. Function "Close All" , "Clear” mean what? C. Key codesfft(y,NFET)/L; means what?D. Spectrum analysis is an important part of signal and system. Pleasebriefly describe the difference and relationship between FS and ftof periodic signal. E. In the above code, by what sampling frequency conditions, it candraw two or three frequency components? Please analyze the reasonand show it in MATLAB.
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