Question 85 Two key method is a) popular method in e-commerce b) used by encryption algorithm to transform a plain-text message into a cipher c) provides secure transmission d) used in database storage of payment data e) All options are correct O 1) a O 2) b O 3) c O 4) d O 5) e
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- Consider the following command: UPDATE customerSET customer_id = customer_id --1; What happens if we run this command in MySQL? The customer_id in the customer table for all records is incremented by 1. The customer table has every customer_id set to the same value as it previously had. An error is thrown due to the --. The customer_id in the customer table for all records is decremented by 1.You have a frequent itemset I={football, cricket, swimming, climbing} that contains 4 items. What does it mean when you say that I is a maximal itemset? a. There is no other frequent itemset for the given dataset b. a) There is no superset of I that is a frequent itemset c. The set {cricket, swimming, climbing} is not frequent d. All frequent itemsets have 4 items Look at the command for the Document Database below. What does it do? db.superheroes.insert{ { collection: “people”, forename: “Bruce”, surname: “Banner”, age: 40 } }; a. It deletes a record for Bruce Banner b. a) It inserts a record for Bruce Banner in the collection superheroes c. It inserts the record for Bruce Banner in the collection people d. It creates a new collection for Bruce Banner in the collection peopleComplete 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 }
- Given the relational database shop defined in the script below; create database shop;use shop; create table users( id int null auto_increment, firstname varchar(255), lastname varchar(255) not null, primary key (id)); create table items( id int null auto_increment, name varchar(255), price float, primary key (id)); create table orders( id int null auto_increment, id_users int not null, id_items int not null, primary key (id), foreign key (id_users) references users(id), foreign key (id_items) references items(id)); write three SQL queries to answer the following questions 1.- All products(items) in the shop catalog; product code, name and price 2.- Products sold in the shop; product code, name and price and full name of buyer. 3.- Products in stock (not sold); product code, name and priceQuestion # 3: Use the concept of a one-way hash function to encrypt the following name into a 9 x 9 -dimensional database table. Jonathan Leea) How many rows and columns are there on this tableb) Which indices is Jonathan on this tablec) Why are hash functions relevant in database encryption?d) What would you do to remedy the problem of index congestion on your database?You must show all the steps of your work DONOT WRITE THE COMPUTER PROGRAMConsider the following PL/SQL script: SET SERVEROUTPUT ON BEGIN INSERT INTO COURSE (course_no, description, created_by, created-date, modified_by, modified_date) VALUES (course_no_seq.nextval, ‘database development’, USER, SYSDATE); COMMIT DBMS_OUTPUT.PUT_LINE (‘One course has been added’); END; Assumptions: All the COURSE table fields have check constraints defined on them indicating that none can be null. Explain why the script does not execute successfully. Add a user-defined exception to the script, so that the error generated by the INSERT statement is handled. Assign the code 2290 to this exception.
- USING Microsoft studio SQL serve make a script that creates a user-defined role name FisionMike with the password 'NSV3p!4' that has the default database as FisionDB_v3 and has both Check Expiration and Check Policy turned offIn which of the following cases would it make the most sense to use a b-tree index? SELECT *FROM customerWHERE email LIKE '%gmail%'; SELECT *FROM employeeWHERE title LIKE '%IT%'; SELECT *FROM invoiceWHERE invoice_id > 10 AND invoice_id < 200; SELECT *FROM customerKeyError Traceback (most recent call last) File ~\Anaconda3\lib\site-packages\pandas\core\indexes\base.py:3621, in Index.get_loc(self, key, method, tolerance) 3620 try: -> 3621 return self._engine.get_loc(casted_key) 3622 except KeyError as err: File ~\Anaconda3\lib\site-packages\pandas\_libs\index.pyx:136, in pandas._libs.index.IndexEngine.get_loc() File ~\Anaconda3\lib\site-packages\pandas\_libs\index.pyx:163, in pandas._libs.index.IndexEngine.get_loc() File pandas\_libs\hashtable_class_helper.pxi:5198, in pandas._libs.hashtable.PyObjectHashTable.get_item() File pandas\_libs\hashtable_class_helper.pxi:5206, in pandas._libs.hashtable.PyObjectHashTable.get_item() KeyError: 'Year' The above exception was the direct cause of the following exception: KeyError Traceback (most recent call last) Input In [46], in <cell line: 1>() ----> 1 get_year_pop('Aruba') Input In [45], in get_year_pop(country_name) 7 df = df[df['Country Name'] == country_name] 8 # Select only the 'Year' and…
- Which of the statements below is correct? a. Non-Oracle RDBMS use tablespaces as storage independent of database b. In Oracle, all users are given access to Tablespace. c. In Oracle, all instances use the same listener d. In Oracle, users who access the Database can all achieve the same results.In MongoDB, if documents in the collection had key names of fname, lname, age, email, and gender, in addition to the unique identifier, which values would be displayed in the output if the following command was entered: > db.collectionname.find({ "age" : { "$gt" : 18 }}, {fname: 1, lname:1, age:1}) A. fname, lname, age, email, gender, _id B. fname, lname and age C. fname, lname, age, email, gender D. fname, lname, age and _idOur MongoDB database consists of a ‘class’ collection in which documents represent students and have fields ‘name’, ‘age’ and ‘address’. The value of the field ‘address’ is an embedded document with fields ‘number’, ‘street’ and ‘city’. How would you query documents for students from Belfast? a. db.class.find ( { “class.address.city”: “Belfast” } ) b. db.class.find ( { city: “Belfast” } ) c. a) db.class.find ( { “address.city”: “Belfast” } ) d. db.class.find ( { “class.city”: “Belfast” } ) NoSQL is an umbrella term for several databases. These are typically used to address problems with what type of database. a. Object-oriented databases b. XML files c. Relational Databases d. Spreadsheets