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# Exercise Title Features Description Platform Keywords
1 Concatenate elements backwards Code Completion Your task is to concatenate all elements in a linked list of strings backwards, starting at the end of the... CodeCheck Linear Data Structures
2 Duplicate short words Code Completion Your task is to duplicate all short words (that is, words with at most 3 characters) in a linked list.... CodeCheck Linear Data Structures
3 Remove all but first two elements from linked list Code Completion Write a method that removes all but the first two elements from a linked list, using an iterator. You may... CodeCheck Linear Data Structures
4 Palindrome testing with stack and queue Code Completion Using a queue and a stack, implement a method that tests whether a sequence of numbers is a palindrome, that... CodeCheck Linear Data Structures
5 Implement addLast using raw nodes Code Completion Implement the addLast method in this simplified LinkedList class. CodeCheck Linear Data Structures
6 Add an element to the front and back of a linked list Code Completion Implement a method that adds an element to the beginning of a linked list and another at the end. CodeCheck Linear Data Structures
7 Remove short words Code Completion Your task is to remove all short words (that is, words with at most 3 characters) from a linked list. CodeCheck Linear Data Structures
8 Rotate linked list by manipulating nodes Code Completion Your task is to add a rotate method to the LinkedList class of Section 15.2 that rotates the elements of... CodeCheck Linear Data Structures
9 Using a stack for checking balanced parentheses Code Completion A stack can be used to check whether an arithmetic expression such as CodeCheck Linear Data Structures
10 Add an element after the first and before the last Code Completion Write a method that adds an element after the first and another before the last element of a nonempty linked... CodeCheck Linear Data Structures
11 Linear Data Structures Summary Questions Question, Battery Self-practice questions comparing uses of linear structures. OpenDSA List, Stack, Queue