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Computer Standard Library Functions Difficulty: Medium

What will be the output of the following code: for (int i = 0; i < 3; ++i) { for (int j = 0; j < 2; ++j) { cout << i << j << " "; } }? What is the possible number of binary trees that can be created with 3 nodes, giving the sequence N, M, L when traversed in post-order. Which one of the following function returns the port number of a specified service? The ________ declaration specifies which characters and delimiters may appear in the application. What will be the output of the following Java program? class variable_scope { public static void main(String args[]) { int x; x = 5; { int y = 6; System.out.print(x + " " + y); } System.out.println(x + " " + y); } }