Write a recursive function in Java /** * Generate all combinations of the characters in the string s with length k. *  * @param s a string. * @param k  the length of the combinations * @return a list of all of the combinations of the strings in s. */

Implement the following function: Code should be written in python.

Write code in assembly language Question 1: Construct a program using 2D array. Define a list of strings in the 2D arrays, the list should be only a string. Get a string from a user as input Search the user's string in the list of strings. If string is found print the string, and a message "String is Found". If string is not found print only a message "String is Not Found".

Write a C++ Program that does the following: Implement a sort function using a vector.Ask the user to enter numbers to be sorted. Add them to the vector. The user will signal the end of input bygiving you a negative number.Then, sort the vector. Because this is a vector, you don’t need to pass the number of entriesin the vector.Then, print out the vector in order.Remember the following things about vectors.a) You declare a vector v of ints by saying vector⟨int⟩ v;b) You add elements to a vector by saying v.push back(thing to be added);c) You access elements of a vector with [ ] just like an array;d) One of the vector member functions is .length()