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Computer Searching Algorithms Difficulty: Medium

Which of these is the name of a type of interface that allows a user to type in commands on a keyboard which gives the computer instructions? What is the result of compiling and running the following code? class Base{ public Base(){ System.out.print("Base"); } } public class Derived extends Base{ public Derived(){ this("Examveda"); System.out.print("Derived"); } public Derived(String s){ System.out.print(s); } public static void main(String[] args){ new Derived(); } } What will be the sequence of allocation and deletion of variables in the following C code? #include <stdio.h> int main() { int a; { int b; } } The input and output devices are located away from the central computer facility in which particular type of processing. What is the purpose of the File.exist? method in Ruby?