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Question A1 (a) Suppose that queue Q is initially empty. The following sequence of queue operations is executed: enqueue (5), enqueue (3), dequeue(), enqueue(2), enqueue(8), dequeue (), enqueue (1), enqueue (9), enqueue (7), getRearElement(), dequeue(), enqueue (4). isEmpty(), dequeue (), getFrontElement(), enqueue (6), (i) Write down the returned numbers (in order) of the above sequence of queue operations. (ii) Write down the values stored in the queue after all the above operations.

Question A1 (a) Suppose that queue Q is initially empty. The following sequence of queue operations is executed: enqueue (5), enqueue (3), dequeue(), enqueue(2), enqueue(8), dequeue (), enqueue (1), enqueue (9), enqueue (7), getRearElement(), dequeue(), enqueue (4). isEmpty(), dequeue (), getFrontElement(), enqueue (6), (i) Write down the returned numbers (in order) of the above sequence of queue operations. (ii) Write down the values stored in the queue after all the above operations.

Database System Concepts
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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Question A1 (a) Suppose that queue Q is initially empty. The following sequence of queue operations is executed: enqueue (5), dequeue (), enqueue (1), enqueue (3), isEmpty(), dequeue (), getRearElement(), dequeue(), enqueue (4). enqueue (8), getFrontElement(), enqueue (6), dequeue(), enqueue (9), enqueue (2), enqueue (7), (i) Write down the returned numbers (in order) of the above sequence of queue operations. (ii) Write down the values stored in the queue after all the above operations. (b) Suppose that stack S initially had 5 elements. Then, it executed a total of: 25 push operations R+5 peek operations 3 empty operations R+1 stack_size operations 15 pop operations The mentioned operations were NOT executed in order. After all the operations, it is found that R of the above pop operations raised Empty error message that were caught and ignored. What is the size of S after all these operations? R is the last digit of your student ID. E.g., Student ID is 20123453A, then R= 3. (c) Are there any sorting algorithms covered in our course that can always run in O(n) time for a sorted sequence of n numbers? If there are, state all these sorting algorithm(s). If no, state no.
Transcribed Image Text:Question A1 (a) Suppose that queue Q is initially empty. The following sequence of queue operations is executed: enqueue (5), dequeue (), enqueue (1), enqueue (3), isEmpty(), dequeue (), getRearElement(), dequeue(), enqueue (4). enqueue (8), getFrontElement(), enqueue (6), dequeue(), enqueue (9), enqueue (2), enqueue (7), (i) Write down the returned numbers (in order) of the above sequence of queue operations. (ii) Write down the values stored in the queue after all the above operations. (b) Suppose that stack S initially had 5 elements. Then, it executed a total of: 25 push operations R+5 peek operations 3 empty operations R+1 stack_size operations 15 pop operations The mentioned operations were NOT executed in order. After all the operations, it is found that R of the above pop operations raised Empty error message that were caught and ignored. What is the size of S after all these operations? R is the last digit of your student ID. E.g., Student ID is 20123453A, then R= 3. (c) Are there any sorting algorithms covered in our course that can always run in O(n) time for a sorted sequence of n numbers? If there are, state all these sorting algorithm(s). If no, state no.
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