Consider the Deque ADT (a double-ended queue): Deque: addFront (x) adds x to the front of the deque removeFront () removes the element at the front of the deque addBack (x) adds x to the back of the deque removeBack() removes the element at the back of the deque size() returns number of elements in deque Select all options that allow for an efficient implementation (of all methods) based a the discussions from class. For any array implementation, you can assume the array large enough so that making a larger one is not needed when pushing an item to the stack. You can assume that a linked list will have both a head and tail reference. Using an array with the front of the deque at the front of the array. Using an array with the front of the deque at the back of the array. Using a singly linked list with the front of the deque at the head of the list. Using a singly linked list with the front of the deque at the tail of the list. None of these choices allows for an efficient implementation of all methods.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Consider the Deque ADT (a double-ended queue):
Deque:
addFront (x) adds x to the front of the deque
removeFront () removes the element at the front of the deque
addBack (x) adds x to the back of the deque
removeBack() removes the element at the back of the deque
size() returns number of elements in deque
Select all options that allow for an efficient implementation (of all methods) based on
the discussions from class. For any array implementation, you can assume the array is
large enough so that making a larger one is not needed when pushing an item to the
stack. You can assume that a linked list will have both a head and tail reference.
Using an array with the front of the deque at the front of the array.
Using an array with the front of the deque at the back of the array.
Using a singly linked list with the front of the deque at the head of the list.
Using a singly linked list with the front of the deque at the tail of the list.
None of these choices allows for an efficient implementation of all methods.
Transcribed Image Text:Consider the Deque ADT (a double-ended queue): Deque: addFront (x) adds x to the front of the deque removeFront () removes the element at the front of the deque addBack (x) adds x to the back of the deque removeBack() removes the element at the back of the deque size() returns number of elements in deque Select all options that allow for an efficient implementation (of all methods) based on the discussions from class. For any array implementation, you can assume the array is large enough so that making a larger one is not needed when pushing an item to the stack. You can assume that a linked list will have both a head and tail reference. Using an array with the front of the deque at the front of the array. Using an array with the front of the deque at the back of the array. Using a singly linked list with the front of the deque at the head of the list. Using a singly linked list with the front of the deque at the tail of the list. None of these choices allows for an efficient implementation of all methods.
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