Which statement is INCORRECT based on codes below. 44 45 46 47 48 49 50 51 //start the simulation machinewash-status.free; if (!arrivalQueue.isEmpty()) { } else startTime=arrivalQueue.peek(); washEnd-startTime.getCopy(); washEnd.addTimeMinute (5); no-ondTimo go+Copy()
Which statement is INCORRECT based on codes below. 44 45 46 47 48 49 50 51 //start the simulation machinewash-status.free; if (!arrivalQueue.isEmpty()) { } else startTime=arrivalQueue.peek(); washEnd-startTime.getCopy(); washEnd.addTimeMinute (5); no-ondTimo go+Copy()
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
Related questions
Question
3 questions
From the answers given, which one is TRUE for postcondition of enqueue.
a.
New item is at the rear of the queue
b.
New item is at the front of the queue
c.
New item is at the middle of the queue
d.
None of the listed here
Transcribed Image Text:Which statement is INCORRECT based on codes below.
44
45
//start the simulation
machinewash-status.free;
if (!arrivalQueue.isEmpty()) {
46
47
48
startTime=arrivalQueue.peek();
washEnd-startTime.getCopy();
washEnd.addTimeMinute (5);
49
50
} else
51
startTime=endTime.getCopy();
52
O a. The wash machine takes 5 minutes to complete one service in
Line 49.
O b.
The initial status for the machinewash is free in Line 45.
O c. The front car in the queue will be served first in Line 47.
d.
The rear car in the queue will be served first in Line 47.
Transcribed Image Text:Assume S is a stack that is initially empty and Q is a queue that contains
n-elements. What will be the contents of Q after the code is executed?
while
(!Q.isEmpty()) {
S.push(Q.dequeue());
}
while
(!S.isEmpty()) {
Q.enqueue (S.pop());
}
O a. Q will be empty (No element in the queue)
O b. None of these
O c. Q will be reversed (All elements are in the reverse order)
O d. No change to the contents of Q
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