166. A unit of storage that can store one or more records in a hash file organization is denoted as a. Buckets b. Disk pages c. Blocks d. Nodes
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166. | A unit of storage that can store one or more records in a hash file organization is denoted as |
a. | Buckets |
b. | Disk pages |
c. | Blocks |
d. | Nodes |
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- 14. The unit of storage that can store one are more records in a hash file organization are a. Buckets b. Disk pages c. Blocks d. NodesPassword Cracking Each student should be able to access* one PassXX.hash file. This file contains 4 unsalted md5 password hashes (md5 is commonly used for hashing passwords, though it is a bit weak for modern use. It is very important to salt passwords before hashing them, since leaving them unsalted makes them easier to crack. However, many sites fail to do this). Your assignment is to use Hashcat (or another password cracking or password "recovery" tool) to retrieve the original passwords from the hashes, and submit the password/hash pairs. Each set of hashes contains 1 very easy password and 3 slightly challenging passwords of differing format. Link to hashcat: https://hashcat.net/hashcat/ Note: You will also need one or more dictionaries to perform a dictionary attack. *access: Files are accessible based on your last name. You should see a large number of files that are not accessible due to your account having a wrong last name, and one file that is accessible that lacks…2 Hashing for URL Retrieval: Given 10,000 URL visit records, design a hashing-based method so that we can quickly retrieve URLS that are most frequently visited. Describe your design concerns in a txt file. Like how you would design the data structure and how you plan to process input and generate output. For instance, your input is a file containing 10,000 rows, where each row contains: URLaddress,visit_timestamp Note that one URLaddress can be visited multiple times.
- 1. A hashing function converts a large ___ to a small ___. 2. A ___ occurs when two keys hash to the same address. 3. For an open hashing scheme, the records within each bucket are stored in key order ( true / false ). 4. For an open hashing scheme, the most recently inserted record will be on the front end of the bucket list ( true / false )167. The file organization which allows us to read records that would satisfy the join condition by using one block read is a. Heap file organization b. Sequential file organization c. Clustering file organization d. Hash file organizationPYTHON CODE (DATABASE) #flask_SQLAchemy using: db.session.add() and db.session.delete (add): Implement a database code that allows the user to enter the name of a fruit. This fruit should be saved in a list of favorites. If it’s already on the list, nothing should happen. (delete):Now the user will be allowed to enter a name of a fruit. This fruit should be deleted from the list of favorites. If it’s not on the list, nothing should happen. (output): The ouput page should return the statement “You have X saved fruits”, where X is the number of fruit the user has saved, as well as a list of the saved fruits. The number should increment when a new fruit is entered, and decrement when a fruit is deleted.
- LabProgram.java:8: error: class HorseDatabase is public, should be declared in a file named HorseDatabase.java public class HorseDatabase { ^ 1 error Complete the Java program to create a Horse table, insert one row, and display the row. The main program calls four methods: createConnection() creates a connection to the database.createTable() creates the Horse table.insertHorse() inserts one row into Horse.selectAllHorses() outputs all Horse rows.Complete all four methods. Method parameters are described in the template. Do not modify the main program. The Horse table should have five columns, with the following names, data types, constraints, and values: Name Data type Constraints ValueId integer primary key, not null 1Name text 'Babe'Breed text 'Quarter horse'Height double 15.3BirthDate text '2015-02-10'The program output should be: All horses:(1, 'Babe', 'Quarter Horse', 15.3, '2015-02-10')This lab uses the SQLite database…A hash function should be independent of the capacity of the hash table. Select one: a. False O b. Truechoose the correct answer An application requires to maintain the history of past events. the best data structure is: a. Linked List with History b. Queue c. Stack d. Linked List An application requires frequent insertion and deletion of data. The data to be inserted is large. Which data structure you will choose? a. Array b. Stack c. Linked List d. queue An application requires strict ordering of jobs to be processed on a first-come-first-served basis. Which data structure you will choose? inked List b. Double Linked List c. Stack d. Queue Consider a linked List with just one node. The first node in the list is referred by 'head'. Now, if we execute the code: head=head.next What will happen? a. Another 'head' is assigned to the first node b. head points to the last node which is not null c. head points to the next node which is not null d. We lose the…
- A sorted file has the following details: Number of records = 13,10,720; record length = 200 bytes; size of the primary key field = 13 bytes; size of block pointer = 7 bytes; block size = 2048 bytes. For this file, we need to build a multi-level index on the primary key. The number of blocks in the first level index file isWhich search method is the most efficient for an ordered file? a) binary search b) hashing method c) linear search1:34 b a 2. Different operating systems use different file allocation techniques to store files in the secondary storage device such as HDD. One of the techniques is "Linked allocation". In this technique, each file is divided into several data blocks of same size. Each data block has a link to its next block like a singly linked list. So, the data blocks are scattered on the disk. The directory contains a pointer to the starting and the ending data block of a file. The diagram below depicts a sample linked allocation system of a file Abc.txt: Directory entry File Start End Abc.txt 100 900 Data 900 Data Data block 1 block 2 Data block 3 block N Write a Java program to implement the linked allocation of a given text file Assgn1_2.txt (uploaded with the assignment) who's each block will contain maximum 50 characters. Read the content of the given file and store it in data blocks (maximum 50 characters per block). Now show a menu that will ask the user to i) add new content at the end of…