Question

The following code segment is a count-controlled loop going from 1 to 5. At each iteration, the loop counter is either printed or put on a queue depending on the result of Boolean function RanFun(). (The behavior of RanFun() is immaterial. At the end of the loop, the items on the queue are dequeued and printed. Because of the logical properties of a queue, this code segment cannot print certain sequences of the values of the loop counter. Is the following output possible using a queue: 1 2 3 4 5?

Answer 1

Yes, the sequence '1 2 3 4 5' is possible using a queue because if each number is queued, they will be dequeued in the order they were enqueued due to the FIFO nature of queues.

Step-by-step explanation:

The student has described a situation involving a count-controlled loop and a queue. The loop runs from 1 to 5, and depending on the result of a Boolean function RanFun(), the loop counter is either printed immediately or placed onto a queue to be printed later. The question asks if it's possible to have the sequence '1 2 3 4 5' printed by this process.

A queue is a First-In-First-Out (FIFO) data structure, which means that items are removed from the queue in the same order they were added. If all numbers from 1 to 5 are placed on the queue, they will be dequeued in that same order, thus producing the sequence '1 2 3 4 5' upon printing. Therefore, it is indeed possible for this code segment to print the sequence '1 2 3 4 5' if each loop counter value is enqueued and subsequently dequeued without interruption or reordering.

Answer 2

True.

Step-by-step explanation:

For all the count values, if Ranfun() returns true then all the values of count would be printed. Then the sequence of count values printed would be 1 2 3 4 5. Also for all the values of count if Ranfun() returns false then all the values would be enqueued. When we try to dequeue elements from queue we would get them in the same order of their entry into the queue. Thus, the sequence would be 1 2 3 4 5. Hence, we can say that this output sequence is possible. TRUE.