0.5) (a) Create a Series object named sl from x, s2 from y, and s3 from z. Set the index of each object to index-['r','r2','ra','r4','r5','r6']. (b) Create a DataFrame object (named dr ) from the Series objects you created in part (a). Set the column names of the dataframe to names ['coll','col2','co13']. (2) (a) Consider the dataframe that you created in Problem 1 (b). Sort the dataframe by the firrst column in the ascending order. Name as df_ascending (b) Consider your sorted dataframe from part (a). Generate a column (named colo) as the logarithm of the thind column (col3) of the dataframe. Add colo to the dataframe. Your resulting dataframe should be in the following form. Name this new dataframe as dr_log s919 coll co12 cola

0.5) (a) Create a Series object named sl from x, s2 from y, and s3 from z. Set the index of each object to index-['r','r2','ra','r4','r5','r6']. (b) Create a DataFrame object (named dr ) from the Series objects you created in part (a). Set the column names of the dataframe to names ['coll','col2','co13']. (2) (a) Consider the dataframe that you created in Problem 1 (b). Sort the dataframe by the firrst column in the ascending order. Name as df_ascending (b) Consider your sorted dataframe from part (a). Generate a column (named colo) as the logarithm of the thind column (col3) of the dataframe. Add colo to the dataframe. Your resulting dataframe should be in the following form. Name this new dataframe as dr_log s919 coll co12 cola

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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This table shows a page reference string 1, 2, 3, 1, 4, 5, 3, 6, 7, 2, 2, 1, 7, 6, 5, 7, 4, 7, 1 and the corresponding frame allocations. Use this for questions 10,11,12,13. There are 4 frames of memory. Please copy and complete the allocations. For each frame which maintains the same page as in the previous step please enter"=" The first 5 columns have been filled in. 1|2|31|4|5|36|7 221765 7 4 7 1 1. 1 2. 2 3 4 Show the table if the page replacement algorithm is FIFO - First In First Out. Show the table if the page replacement algorithm is optimal.
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