Generate all permutations of a string and determine if each is in the dictionary. Find an efficient data structure for the dictionary.
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Hardest question was how to sort a linked list using recursion only. I knew the iterative solution but couldn't come up with recursion. Very difficult.
Given a head node to a linked list, find out the Nth to the last node in the list. Give test cases to the program.
Given a 7 digit phone number, find out all the words that can be formed using this number based on the T9 keypad.
Write a function that finds all the times a clocks hours and minutes hand are at 90 degrees.
convert strings into int types;
Reverse a string in a matrix in place. you are given the direction and length of the string.
Implement strstr in the language of your choice.
Write a program in java that determines whether a string is a palindrome.
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