Write a Perl program that uses a hash and a large number of operations on the hash. For example, the hash could store people's names and their ages. A random-number generator could be used to create three- character names and ages, which could be added to the hash. When a duplicate name was generated, it would cause an access to the hash but not add a new element. Rewrite the same program without using hashes. Compare the execution efficiency of the two. Compare the ease of programming and readability of the two.

Write a Perl program that uses a hash and a large number of operations on the hash. For example, the hash could store people's names and their ages. A random-number generator could be used to create three- character names and ages, which could be added to the hash. When a duplicate name was generated, it would cause an access to the hash but not add a new element. Rewrite the same program without using hashes. Compare the execution efficiency of the two. Compare the ease of programming and readability of the two.

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

See similar textbooks

Similar questions

Write a Perl program that uses a hash and a large number of operationson the hash. For example, the hash could store people’s names and theirages. A random-number generator could be used to create threecharacter names and ages, which could be added to the hash. When aduplicate name was generated, it would cause an access to the hash butnot add a new element. Rewrite the same program without using hashes.Compare the execution efficiency of the two. Compare the ease ofprogramming and readability of the two.
Write a c++ code that compare the times to traverse a list (containing a large number of elements) implemented in an array, in a simple linked list, and in an unrolled linked list. In this experiment, you need to generate a large list, store it in each representation, and then measure the time to traverse the list in each representation. For the array, this is almost straightforward: Fill the array and then do a sequential scan. Here is the thing to watch for: When you fill the array, it all gets read into cache. So, somehow you need to ensure that almost all of the array is NOT in cache before you do your traversal. One thing you can do is make your array big enough that most of it will not fit in cache at once. You need to make sure that the node capacity is not too small, or it will behave too much like a simple linked list.
Apply the methods in the ListIterator interface to write a Java program in NetBeans that creates a LinkedList of four elements of type string, namely: Java, C#, PHP and Python.The program should then print out the elements initially in the original order, and then afterwards in reverse order using the ListIterator methods. In this case, the following(attached) is the expected output:
Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client given on page 370. Add code to take additional command-line arguments, as appropriate.Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client given on page 370. Add code to take additional command-line arguments, as appropriate.Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client given on page 370. Add code to take additional command-line arguments, as appropriate.Write a test client…
Apply the methods in the ListIterator interface to write a Java program in NetBeans that creates a LinkedList of four elements of type string, namely: Java, C#, PHP and Python. The program should then print out the elements initially in the original order, and then afterwards in reverse order using the ListIterator methods. In this case, the following is the expected output:
Write a program that animates quadratic probing,as shown in Figure . You can change the initial size of the hash-table in theprogram. Assume the load-factor threshold to be 0.8.
Apply the methods in the ListIterator interface to write a Java program in NetBeans that creates a LinkedList of four elements of type string, namely: Java, C#, PHP and Python.The program should then print out the elements initially in the original order, and then afterwards in reverse order using the ListIterator methods. In this case, the following is the expected output: Run: original order of strings: Java C# PHP Python Reverse order of strings: Python PHP C#Java BUILD SUCCESSFUL
Implement a city database using ordered lists by using java. Each database record contains the name of the city (a string of arbitrary length) and the coordinates of the city expressed as integer x and y coordinates. Your database should allow records to be inserted, deleted by name, and searched by name. Another operation that should be supported is to print all records within a given distance of a specified point/coordinate. The order of cities should be alphabetically by city name. Implement the database using both: an arraybased list implementation, and a circular single linked list implementation.Use may the following node, SLL implementations to implement an ordered circular single linked list
Please use C++ and provide the code along with a sample output The implementation of a queue in an array, as given in this chapter, uses the variable count to determine whether the queue is empty or full. You can also use the variable count to return the number of elements in the queue. On the other hand, class linkedQueueType does not use such a variable to keep track of the number of elements in the queue. Redefine the class linkedQueueType by adding the variable count to keep track of the number of elements in the queue. Modify the definitions of the functions addQueue and deleteQueue as necessary. Add the function queueCount to return the number of elements in the queue. Also, write a program to test various operations of the class you defined.
A set of integers 0..MAX may be implemented using an array of boolean values. This particular implementation is called a bit-vector implementation of a Set. Since C doesn’t have the Boolean data type, then substitute TRUE with 1 and FALSE with 0, or define 1 and 0 as TRUE and FALSE, respectively.For example, if the integer 3 is an element of the set, then the array element indexed by 3 is TRUE. On the other hand, if 3 is not an element, then the array element indexed by 3 is FALSE. For example, if the integer 3 is an element of the set, then the array element indexed by 3 is TRUE. On the other hand, if 3 is not an element, then the array element indexed by 3 is FALSE.For example: if s = {3,4,6,8}, the array looks like this: Implement a programmer-defined data type called BitSet to represent a set as follows:typedef int BitSet[MAX];Implement the following functions:void initialize(BitSet s); - set all array elements to FALSEvoid add(int elem,BitSet s);- set the item indexed by elem to…
Write a program using C++ that uses a hashing algorithm to create a list of students present in a class. Consider the student numbers as keys, while implementing rotation, fold boundary methods and linear probing (include modulo division if necessary) for an array-based list of length 1000. After creating the list, allow the user to search for the name of a student and report its student number.
Java. Implement a method that will return a String with an array's elements separated by spaces. The mehod will recieve three parameters: the integer array, a start index, and an end index. Both start and end are includive. The method's signature is as follows: public static String printRange(int [], int, int) - make the method public to faciliate testing - If the indexes are outside the bounds of the array, the method should return "Invalid Range." Otherwise, the method will return a String containing one integer after the other on the same line separated by one space. Example 1: Given {4,1,2,36,6}, 1, 3 as the parameters; the method should return "1 2 36" Example 2: Given {4,1,2,36,6}, 0, 7 as the parameters; the method should return "Invalid Range"