In the section 8.3 queue implementation, what statement about destructor(linked list) is correct? The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_head_insert does not work. The destructor does not requires that front_ptr is NULL for an empty queue. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to empty does not work. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_clear does not work. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the rear_ptr = rear_ptr->link(); does not work.
In the section 8.3 queue implementation, what statement about destructor(linked list) is correct? The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_head_insert does not work. The destructor does not requires that front_ptr is NULL for an empty queue. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to empty does not work. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_clear does not work. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the rear_ptr = rear_ptr->link(); does not work.
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
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Transcribed Image Text:In the section 8.3 queue implementation, what statement about destructor(linked list) is correct?
The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_head_insert does not work.
The destructor does not requires that front_ptr is NULL for an empty queue.
The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to empty does not work.
The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_clear does not work.
The destructor requires that front_ptr is NULL for an empty queue. Otherwise the rear_ptr = rear_ptr->link(); does not
work.
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