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Computer Searching Algorithms Difficulty: Medium

In Data Science, what is the term for the process of reducing the dimensionality of a dataset while preserving information? What will be the output of the following C++ code? #include <iostream> #include <stdarg.h> using namespace std; void fun(std::string msg, ...); int main() { fun("cPlusPlus", 1, 4, 7, 11, 0); return 0; } void fun(std::string msg, ...) { va_list ptr; int num; va_start(ptr, msg); num = va_arg(ptr, int); num = va_arg(ptr, int); cout << num; } Buying and selling the products over electronic systems like internet is called _______ Function key to select purchase voucher is If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is