9 which of the following statement is incorrect about hash function? OA The hash function should be simple and can calculate the result in a short time OB The definition field should include all keyword values, and the value range must be within the table length OC The calculated address should be distributed throughout the address space OD The loading factor must be limited to less than 0.8 10 The preorder sequence of a BST is 18,43,27,36,39,44, and the postorder sequence should be OA 44,43,39,36,27,18 OB 39,36,27,44,43,18 OC 27,36,39,44,43,18 OD uncertain

9 which of the following statement is incorrect about hash function? OA The hash function should be simple and can calculate the result in a short time OB The definition field should include all keyword values, and the value range must be within the table length OC The calculated address should be distributed throughout the address space OD The loading factor must be limited to less than 0.8 10 The preorder sequence of a BST is 18,43,27,36,39,44, and the postorder sequence should be OA 44,43,39,36,27,18 OB 39,36,27,44,43,18 OC 27,36,39,44,43,18 OD uncertain

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter6: Additional Database Objects

Section: Chapter Questions

Problem 8MC

See similar textbooks

Similar questions

Computer Science Write a script that creates four login IDs based on the contents of a new table named NewLogins: CREATE TABLE NewLogins (LoginName varchar(128)); INSERT NewLogins VALUES ('BBrown'), ('CChaplin'), ('DDyer'), ('EEbbers'); Use dynamic SQL and a cursor to perform four actions for each row in this table: (1) create a login with a temporary password that's based on the first four letters of the login name followed by “99999”; (2) set the default database to the AP database; (3) create a user for the login with the same name as the login; and (4) assign the user to the PaymentEntry role you created in exercise 1..
Create a hash function-based direct file organization to keep an item file with the item number as its primary key. The main keys of a sample collection of item file records are listed below. Assume that each bucket can hold two records and that each block in the main storage area can hold a maximum of four records. Use the hash function h(k) = k mod 8, where k indicates the primary key's numerical value. (item number).369 760 692 871 659 975 981 115 620 208 821 111 554 781 181 965
To store an item file with the item number as its main key, create a direct file organization using a hash function. The following table lists the primary keys of a sample collection of item file records. Assume that the blocks in the main storage area can hold a maximum of four records per block and that the buckets can hold two records each. Utilize the hash function h(k) = k mod 8, where k is the main key's numerical value. (item number).369 760 692 871 659 975 981 115 620 208 821 111 554 781 181 965
Part A: MySQL Query/Exec Create StudentsDB database in MySQL server with the following table: Table: Students uid int, Primary Key, Auto Increment studentID varchar(8), Unique name varchar(50) major varchar(50) passedCredits int CGPA float Implement the following PHP scripts as required below: php: the script should display student’s info (StudentID, name, major, credits passed and CGPA) in HTML table with appropriate title for each column. Student cells/rows should be highlighted as follows: Condition Highlight Color Student At Risk: CGPA < 2.0 Red for CGPA Cell Expected to graduate: Passed Credits >=115 Yellow for Passed Credits Cell Outstanding Student: CGPA = 3.5 or above Green for the entire Student Row php: This script should display all students’ names and major. Each student will be identified by a checkbox (define the checkbox name as a numeric array holding the uid). The…
Assume a university database's student table has indexes on StudentID (the main key) and Major, Age, MaritalStatus, and HomeZipCode (all secondary keys) (all secondary keys). Imagine the university requested a list of students majoring in MIS or computer science who were over the age of 25, married, and from the 45462 zip code OR students majoring in computer engineering who were single and from the 45462 zip code. How can indexes be used to restrict results to to those records that fulfill this condition?
In your initial post, describe the function of hashing tools you can use to verify that two files are identical. For example, you can compare the hash value of a file on a website with the hash value of that file after you download it. If the hash values match, you downloaded the unmodified version of the website file. Research and discuss at least two examples other than the one provided.
Q4. Suppose we have the following relations: R(A,B,C) and S(D,E,F). Assume that R uses 500 blocks on disk, and S uses 6,000 blocks. Assume that you got the best possible hash function and there are no overflows for the hash. Assuming that there are 102 blocks of memory space for query processing, what is the least cost (in terms of disk block IOs) for partition hash join for the query R JOINC=D S?
Complete the .htaccess code below to tell Apache Web Server what document to display for visitors who fail to authenticate with HTTP error 401. ___ ____ /pmwd/chapter16/secret/rejection.html Use SQL to give the SELECT privilege on all auth database tables to the MySQL user webauth. Modify the following code to perform simple password verification in PHP. if (___($password, $hash)) { // OK passwords match }
Create a MySQL Database called “CSC306Class”. Create three (3) tables in the database called “studentInf”, “IntructorInf”, and “LikedAndDisliked”. Each table should consist of five columns that are relatable to the table name. Insert at least five row of data in each table. The data can be any information as long as it is related to the table name.
Insert the following records into their corresponding tables, using the MySQL CLI. Take a screenshot of a Select * command being successfully executed on each table (6 total). School School Number Name Address PhoneNumber built size 54 John Adams High School 8226 Selby Lane 5056444088 2012-12-13 118500 45 Hogwarts School of Witchcraft and Wizardry 738 North Williams Ave. 5056448362 2001-11-14 414000 119 Dillon High School 475 South University Ave. 5058672818 2006-10-03 102598 345 Green Dale High 772 Grand St. 5056624410 2009-09-17 250345 93 Bayside High 7914 Aspen Drive 5057756575 2000-08-20 175645
discuss the security vulnerability in this pseudocode. show one input that allows an attacker to delete table users. $user_id= $_GET["user"]; //Read username$pwd = $_GET["password"]; //Read password$query = "SELECT home_dir FROM users WHERE uid='".$user_id."' AND Password ='".$pwd."';$result= run_query($query) //If this query returns one row, the login is successful
To store people's names and Social Security numbers, use a dynamically resizable hash table. Using the final four digits of the Social Security number, use the extraction procedure with division. Use a load factor of 0.80 and an initial table size of 31. Open addressing with double hashing on the first three digits of the Social Security number is used.