QUESTION 23 The first readers-writers problem OA) requires that, once a writer is ready, that writer performs its write as soon as possible OB) is not used to test synchronization primitives OC) requires that no reader will be kept waiting unless a writer has already obtained permission to use the shared database OD) requires that no reader will be kept waiting unless a reader has already obtained permission to use the shared database QUESTION 24 What is the correct order of operations for protecting a critical section using mutex locks? OA) release () followed by acquire() O B) acquire () followed by release() OC) wait () followed by signal() OD) signal () followed by wait ()

QUESTION 23 The first readers-writers problem OA) requires that, once a writer is ready, that writer performs its write as soon as possible OB) is not used to test synchronization primitives OC) requires that no reader will be kept waiting unless a writer has already obtained permission to use the shared database OD) requires that no reader will be kept waiting unless a reader has already obtained permission to use the shared database QUESTION 24 What is the correct order of operations for protecting a critical section using mutex locks? OA) release () followed by acquire() O B) acquire () followed by release() OC) wait () followed by signal() OD) signal () followed by wait ()

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter6: Additional Database Objects

Section: Chapter Questions

Problem 8MC

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A database user manually notes that The file contains two hundred records, each record containing nine fields. Use appropriate relational database terminology to translate that statement.
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One way to secure a database is to allow only administrators to have access to create and delete tables. (513)
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Q7:- Choose the correct statement:- Prints the database_information connection = getDbConnection() test1 =connection.get_server_info() cursor = connection.cursor() cursor.execute("select database();") test2 = cursor.fetchone() print(test2) closeDbConnection(connection) Prints the records for the selected database connection = getDbConnection() test1 = connection.get_server_info() cursor = connection.cursor() cursor.execute("select database();") test2 = cursor.fetchone() print(test1) closeDbConnection(connection) Both None of these
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HELP IN DATABASE THIS DID NOT WORK CREATE OR REPLACE PROCEDURE PRC_INV_DELETE (W_IN IN NUMBER) ASBEGINIF W_IN IS NOT NULL THENDELETE FROM INVOICE WHERE INV_NUM = W_IN;END IF;END;
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Q1.) An integrity constraint is a rule that: a. is kept in an external file b. must be followed by data in the database c. can be accessed by authorized users d. can unintentionally be accessed by unauthorized users Q2. __ is a property that lets you change the structure of the database without requiring you to change the programs that access the database. a. Database design b. Data independence c. Integrity constraint d. Data dependence Q3. The basic form of an SQL retrieval command is: a. SELECT-WHERE-FROM b. CREATE-SELECT-FROM c. SELECT-WHERE d. SELECT-FROM-WHERE Q4. Which of the following queries will list the number, name, credit limit, and balance for all customers with credit limits that exceed their balances. a. SELECT CustomerNum, CustomerName FROM Customer WHERE CreditLimit>Balance ; b. SELECT CustomerNum, CustomerName, CreditLimit, Balance FROM Customer WHERE CreditLimit>Balance ; c. SELECT…
Task 1: The InstantRide Management team founded a new team for car maintenance. The new team is responsible for the small maintenance operations for the cars in the InstantRide system. The main idea is to take actions faster and minimize the time spent for the maintenance. Therefore, the Car Maintenance team wants to store MAINTENACE_TYPE_ID (char(5)) and a MAINTENANCE_TYPE_DESCRIPTION (varchar(30)) in the database. Using MAINTENANCE_TYPE_ID as the PRIMARY KEY, create a new table, MAINTENANCE_TYPES, and send the table description with the column names and types to the Car Maintenance team. Task 2: The Car Maintenance team also wants to store the actual maintenance operations in the database. The team wants to start with a table to store CAR_ID (CHAR(5)), MAINTENANCE_TYPE_ID (CHAR(5)) and MAINTENANCE_DUE (DATE) date for the operation. Create a new table named MAINTENANCES. The PRIMARY_KEY should be the combination of the three fields. The CAR_ID and MAINTENACNE_TYPE_ID should be foreign…
Task 1:The InstantRide Management team founded a new team for car maintenance. The new team is responsible for the small maintenance operations for the cars in the InstantRide system. The main idea is to take actions faster and minimize the time spent for the maintenance. Therefore, the Car Maintenance team wants to store MAINTENACE_TYPE_ID (char(5)) and a MAINTENANCE_TYPE_DESCRIPTION (varchar(30)) in the database. Using MAINTENANCE_TYPE_ID as the PRIMARY KEY, create a new table, MAINTENANCE_TYPES, and send the table description with the column names and types to the Car Maintenance team. THIS IS FOR CENGAGE MYSQL

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