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What happens if the following program is compiled and executed? interface MyInterface{ void display(); } interface MySubInterface extends MyInterface{ void display(); } public class Test implements MySubInterface{ public void display(){ System.out.print("Welcome to Examveda."); } public static void main(String args[]){ Test t = new Test(); t.display(); } }
Which command is used to replace word ‘cat’ (already present in the file) with ‘mouse’ at all places in a file ‘old.txt’ and save the result in a new file ‘new.txt’?