6. Suppose a circular queue of capacity (n – 1)elements is implemented with an array of nelements. Assume that the insertion anddeletion operation are carried out usingREAR and FRONT as array index variables,respectively. Initially, REAR = FRONT = 0.The conditions to detect queue full andqueue empty are:Full: (REAR+1) mod n ==empty: (FRONT+1) mod n == REARFRONT,Full: (REAR+1) mod n == FRONT,empty: REAR == FRONTFull: (FRONT+1) mod n == REAR,empty: REAR == FRONTFull: REAR == FRONT, empty:(REAR+1) mod n == FRONT

IMP Point About Queue: We use a circular array as a circular queue because We delete from the rear…

Suppose a circular queue of capacity (n – 1) elements is implemented with an array of n elements. Assume that the insertion and deletion operation are carried out using REAR and FRONT as array index variables,

Suppose a circular queue of capacity (n – 1) elements is implemented with an array of n elements. Assume that the insertion and deletion operation are carried out using REAR and FRONT as array index variables,

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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Question

6. Suppose a circular queue of capacity (n – 1)
elements is implemented with an array of n
elements. Assume that the insertion and
deletion operation are carried out using
REAR and FRONT as array index variables,
respectively. Initially, REAR = FRONT = 0.
The conditions to detect queue full and
queue empty are:
Full: (REAR+1) mod n ==
empty: (FRONT+1) mod n == REAR
FRONT,
Full: (REAR+1) mod n == FRONT,
empty: REAR == FRONT
Full: (FRONT+1) mod n == REAR,
empty: REAR == FRONT
Full: REAR == FRONT, empty:
(REAR+1) mod n == FRONT

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