An application programmer can prevent accessing an empty queue by using the isEmpty method in an if-statement to prevent such access
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20 T OR F An application programmer can prevent accessing an empty queue by using the isEmpty method in an if-statement to prevent such access.
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- Programming assignments1) Waiting line simulation in an Indian post office:In an Indian post office that not only delivers mail but also functions as a savingsbank carrying out specific transactions, a lone postal worker serves a single queue ofcustomers. Every customer receives a token # (serial number) as soon as they enterthe queue. After service, the token is returned to the postal worker, and the customerleaves the queue. At any point in time, the worker may want to know how manycustomers are yet to be served.i) Implement the system using an appropriate queue data structure, simulating arandom arrival and departure of customers after service completion.ii) If a customer arrives to operate their savings account at the post office, thenthey are attended to first by permitting them to join a special queue. In such a case,the postal worker attends to them immediately before resuming their normal serviceof mail delivery. Modify the system to implement this addition in serviceData structure & Alogrithums java program A system of caves is a group of connected undergrounds tunnels. Design an ADT for a cave and cave system. An archaelogist should be able to add a newly discovered cave to a cave system. He/she can enter this system through only one cave and exit the system only through a different cave. Duplicate caves - based on GPS coordinates - are not permitted. Archaelogoist should also be able to list the caves in a given cave system.def is_balanced(root): return __is_balanced_recursive(root) def __is_balanced_recursive(root): """ O(N) solution """ return -1 != __get_depth(root) def __get_depth(root): """ return 0 if unbalanced else depth + 1 """ if root is None: return 0 left = __get_depth(root.left) right = __get_depth(root.right) if abs(left-right) > 1 or -1 in [left, right]: return -1 return 1 + max(left, right) # def is_balanced(root):# """# O(N^2) solution# """# left = max_height(root.left)# right = max_height(root.right)# return abs(left-right) <= 1 and is_balanced(root.left) and# is_balanced(root.right) # def max_height(root):# if root is None:.
- What happens when a programmer attempts to access a node's data fields when the node variable refers to None? How do you guard against it? *PYTHONStack: Stacks are a type of container with LIFO (Last In First Out) type of working, where a new element is added at one end and (top) an element is removed from that end only. Your Stack should not be of the fixed sized. It should be able to grow itself. So using the class made in task 1, make a class named as Stack, having following additional functionalities: bool empty() : Returns whether the Stack is empty or not. Time Complexity should be: O(1) bool full() : Returns whether the Stack is full or not. Time Complexity should be: O(1)int size() : Returns the current size of the Stack. Time Complexity should be: O(1)Type top () : Returns the last element of the Stack. Time Complexity should be: O(1) void push(Type) : Adds the element of type Type at the top of the stack. Time Complexity should be: O(1) Type pop() : Deletes the top most element of the stack and returns it. Time Complexity should be: O(1) Write non-parameterized constructor for the above class. Write Copy…Create a queue, size of queue will be dependent on the user. Insert the numbers in the queue till the queue reaches the size. Create a menu and perform the following function on that queue. This is all done by using oop in C++. Enqueue: Add an element to the end of the queue Dequeue: Remove an element from the front of the queue IsEmpty: Check if the queue is empty IsFull: Check if the queue is full Peek: Get the value of the front of the queue without removing it
- 3- Write a program that randomly generates 10 numbers (between 1 and 8), inserts into queue and then finds how many distinct elements exist in the queue. Example 1: Example 2: Queue: 2 40 3 3 2 18 4 18 18 3 Queue: 1 1 4 33 16 16 4 16 4 Output: 5 Output: 4 Notes: • You must use ONLY queue data structure. Don't use other different data structures like string or normal (pure) array or stack or array list. • Don't write any other method in the Qeueu class. All methods must be written in the main program.Computer Science Part C: Interactive Driver Program Write an interactive driver program that creates a Course object (you can decide the name and roster/waitlist sizes). Then, use a loop to interactively allow the user to add students, drop students, or view the course. Display the result (success/failure) of each add/drop.struct nodeType { int infoData; nodeType * next; }; nodeType *first; … and containing the values(see image) Using a loop to reach the end of the list, write a code segment that deletes all the nodes in the list. Ensure the code performs all memory ‘cleanup’ functions.
- C++ Code for a QueueThe program should features a Queue class with insert(), remove(), peek(),isFull(), isEmpty(), and size() member functions.The main() program creates a queue of five cells, inserts four items, removes threeitems, and inserts four more. The sixth insertion invokes the wraparound feature. All the items are then removed and displayed. The output looks like this:40 50 60 70 80IN PYTHON THANK YOUQ1: Assignment Difficulty Dan has a list of problems suitable for Assignment 4. The difficulties of these problems are stored in a list of integers . The problem’s difficulty is represented by (the higher the integer, the more difficult the problem).ai-tha[i] Dan is too busy eating saltines to worry about Assignment 4 decisions, so he asks Michael the TA to select at least two problems from the list for the assignment. Since there are many possible subsets of the problems to consider and Michael has a life, he decides to consider only sublists (definition follows) of the list of problems. To make grading the assignment easier, Michael wants to pick problems that don’t vary too much in difficulty. What is the smallest difference between the difficulties of the most difficult selected problem and the least difficult selected problem he can achieve by selecting a sublist of length at least 2 of the original list of problems? Definition: A sublist of a list is any list you can obtain by…