
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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I need to be find the result of typing: len("Grand Hotel" [:6] . rstrip()) into Python. I constantly get rstrip as being misspelled.
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An ndarray assignment operation in Python in line with the intention of copying appearsto mess up the computation that follows. What may have gone wrong? And how would you correctthe indicated piece of code? Explain. Please no handwriting.
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If we generated a string like ‘Thanks’ from objects, is it identical to the string value as ‘Thanks’?```pythonjoined_string = ''.join(['T', 'h', 'a', 'n', 'k', 's'])thanks = 'Thanks'joined_string is thanks # What is the result of this line? And Why?
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In python (using matplotlib), how do you plot xn for all integer values of n between zero and five?
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In Python, write an improved version of the chaos.py program that allows a user to input 2 initial values and the number of iterations and then prints a nicely formatted table showing how the values change over time. for example, if the starting values were .25 and .26 with 10 iterations, the table might look the attached table. Except write it to a file and the another program and print it from the file.
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How would I solve this in Java?
it has to: return a string for the day of the week, param offset -the offset from Thursday, and return the name of day of the week.
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PLEASE RETURN THE ENTIRE CODE, INCLUDING WHAT IS GIVEN (PYTHON)
A simple software system for a library models a library as a collection of books and patrons, as per the requirements below:
- A patron can have at most three books out on loan at any given time.
- Each book has a title, an author, a patron to whom it has been checked out, and a list of patrons waiting for that book to be returned.
- When a patron wants to borrow a book, that patron is automatically added to the book’s wait list if the book is already checked out.
- When a patron returns a book, it is automatically loaned to the first patron on its wait list who can check out a book.
- Each patron has a name and the number of books that patron has currently checked out.
Develop the classes Book and Patron to model these objects. Think first of the interface or set of methods to be used with each class, and then choose appropriate data structures for the state of the objects.
Here is the code so far, please write the rest…
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In python,
Problem Description:Sheldon and Leonard are physicists who are fixated on the BIG BANG theory. In order to exchange secret insights they have devised a code that encodes UPPERCASE words by shifting their letters forward.
Shifting a letter by S positions means to go forward S letters in the alphabet. For example, shifting B by S = 3 positions gives E. However, sometimes this makes us go past Z, the last letter of the alphabet. Whenever this happens we wrap around, treating A as the letter that follows Z. For example, shifting Z by S = 2 positions gives B.
Sheldon and Leonard’s code depends on a parameter K and also varies depending on the position of each letter in the word. For the letter at position P, they use the shift value of S = 3P + K.
For example, here is how ZOOM is encoded when K = 3. The first letter Z has a shift valueof S = 3 × 1 + 3 = 6; it wraps around and becomes the letter F. The second letter, O, hasS = 3 × 2 + 3 = 9 and becomes X. The last two letters…
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This assignment is meant to give an alternative viewpoint to counting that is throughthe programming lens.1. Consider the python code below:Numbers = [1, 2, 3, 4, 5, 6]Counter = 0for i in Numbers: for j in Numbers: for k in Numbers: print (i, j, k) Counter = Counter + 1
print(Counter)
(a) What is the above code counting? (Permutations/combinations with/withoutrepetition)(b) If Numbers has nentries, give a closed formula for the number of objects beingcounted.
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2. Using Java notation, suppose A is the alphabet {'a','b','c' }List the labels of all strings in A* from among thefollowing.
a. "" b. "aa" c. "bb" d. "abc"e. "abcd" f. "aaaaaaaa..." (an infinite string ofa's)
-> (THIS IS THE PROBLEM #3) <- 3. For alphabet A of the last problem, how many length 4stringsare there in A*?a. 3 b. 4 b. 12 c. 27 d. 81 e. 64 f. 128
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Rewrite the following piece of java code using iterator pattern. And change the operation inside the for loop to another operation of your own. And What was the advantage of using the iterator ?
import java.util.Iterator
String[ ] originalData = { "one", "two", "three", "four", "five" };
List<String> strings = new ArrayList<>(Arrays.asList(originalData));
for ( int i=0; i<strings.size(); i++) { // process strings.get(i): here, just printSystem.out.println(strings.get(i));}
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Build a TM over the alphabet E={a, b} that accepts the language DoubleA where each word hastwice as many a’s as b’s. You might find it easier if you use the Insert# routine.
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Please implement in Java
implement a keyed bag in which the items to be stored are strings (perhaps people’s names) and the keys are numbers (perhaps Social Security or other identification numbers). So, the in- sertion method has this specification:
public void insert(String entry, int key);// Precondition: size( ) < CAPACITY, and the // bag does not yet contain any item// with the given key.// Postcondition: A new copy of entry has// been added to the bag, with the given key.
When the programmer wants to remove or retrieve an item from a keyed bag, the key of the item must be specified rather than the item itself. The keyed bag should also have a boolean method that can be used to determine whether the bag has an item with a specified key.
In a keyed bag, the pro- grammer using the class specifies a particular key when an item is inserted.
Here’s an implementation idea: A keyed bag can have two private arrays, one that holds the string data and one that holds the corresponding…
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