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NEW QUESTION: 1
Which three statements are true about the usage of optimizer hints?
A. The OPTIMIZER_FEATURES_ENABLE parameter must be set to a version supports the hints used.
B. A schema name for the table must be used in the hint if the table us qualified in the FROM clause.
C. A statement block can have only one hint, and that hint must be immediately after SELECT, UPDATE, INSERT, MERGE, or DELETE keyword.
D. The optimizer uses the execution plan with lower cost even if a hint is specified.
E. Whenever a query uses table aliases, the hints in the query must use the aliases.
F. Hints can be used to override the optimization approach specified with the OPTIMIZER_MODE parameter.
Answer: A,E,F
Explanation:
* You must specify the table to be accessed exactly as it appears in the statement. If the statement uses an alias for the table, then use the alias rather than the table name in the hint.
* OPTIMIZER_FEATURES_ENABLE acts as an umbrella parameter for enabling a series of optimizer features based on an Oracle release number.
For example, if you upgrade your database from release 10.1 to release 11.1, but you want to keep the release 10.1 optimizer behavior, you can do so by setting this parameter to
10.1.0. At a later time, you can try the enhancements introduced in releases up to and including release 11.1 by setting the parameter to 11.1.0.6.
* If a SQL statement has a hint specifying an optimization approach and goal, then the optimizer uses the specified approach regardless of the presence or absence of statistics, the value of the OPTIMIZER_MODE initialization parameter, and the OPTIMIZER_MODE parameter of the ALTER SESSION statement.

NEW QUESTION: 2
CORRECT TEXT
Problem Scenario 17 : You have been given following mysql database details as well as other info.
user=retail_dba
password=cloudera
database=retail_db
jdbc URL = jdbc:mysql://quickstart:3306/retail_db
Please accomplish below assignment.
1. Create a table in hive as below, create table departments_hiveOl(department_id int, department_name string, avg_salary int);
2. Create another table in mysql using below statement CREATE TABLE IF NOT EXISTS departments_hive01(id int, department_name varchar(45), avg_salary int);
3. Copy all the data from departments table to departments_hive01 using insert into departments_hive01 select a.*, null from departments a;
Also insert following records as below
insert into departments_hive01 values(777, "Not known",1000);
insert into departments_hive01 values(8888, null,1000);
insert into departments_hive01 values(666, null,1100);
4. Now import data from mysql table departments_hive01 to this hive table. Please make sure that data should be visible using below hive command. Also, while importing if null value found for department_name column replace it with "" (empty string) and for id column with -999 select * from departments_hive;
Answer:
Explanation:
See the explanation for Step by Step Solution and configuration.
Explanation:
Solution :
Step 1 : Create hive table as below.
hive
show tables;
create table departments_hive01(department_id int, department_name string, avgsalary int);
Step 2 : Create table in mysql db as well.
mysql -user=retail_dba -password=cloudera
use retail_db
CREATE TABLE IF NOT EXISTS departments_hive01(id int, department_name
varchar(45), avg_salary int);
show tables;
step 3 : Insert data in mysql table.
insert into departments_hive01 select a.*, null from departments a;
check data inserts
select' from departments_hive01;
Now iserts null records as given in problem. insert into departments_hive01 values(777,
"Not known",1000); insert into departments_hive01 values(8888, null,1000); insert into departments_hive01 values(666, null,1100);
Step 4 : Now import data in hive as per requirement.
sqoop import \
-connect jdbc:mysql://quickstart:3306/retail_db \
~ username=retail_dba \
--password=cloudera \
-table departments_hive01 \
--hive-home /user/hive/warehouse \
--hive-import \
-hive-overwrite \
-hive-table departments_hive0l \
--fields-terminated-by '\001' \
--null-string M"\
--null-non-strlng -999 \
-split-by id \
-m 1
Step 5 : Checkthe data in directory.
hdfs dfs -Is /user/hive/warehouse/departments_hive01
hdfs dfs -cat/user/hive/warehouse/departments_hive01/part"
Check data in hive table.
Select * from departments_hive01;

NEW QUESTION: 3
DRAG DROP
Case Study
This is a case study. Case studies are not limited separately. You can use as much exam time as you would like to complete each case. However, there may be additional case studies and sections on this exam. You must manage your time to ensure that you are able to complete all questions included on this exam in the time provided.
To answer the questions included in a case study, you will need to reference information that is provided in the case study. Case studies might contain exhibits and other resources that provide more information about the scenario that is described in the case study. Each question is independent of the other question on this case study.
At the end of this case study, a review screen will appear. This screen allows you to review your answers and to make changes before you move to the next sections of the exam. After you begin a new section, you cannot return to this section.
To start the case study
To display the first question on this case study, click the Next button. Use the buttons in the left pane to explore the content of the case study before you answer the questions. Clicking these buttons displays information such as business requirements, existing environment, and problem statements. If the case study has an All Information tab, note that the information displayed is identical to the information displayed on the subsequent tabs. When you are ready to answer a question, click the Question button to return to the question.
Background
Fabrikam is a commercial bank. The primary customers are individuals and employers with up to 10,000 employees. Fabrikam provides Internet banking services to customers.
You are developing a Universal Windows Platform (UWP) app for Fabrikam that extends the Internet banking to a UWP app.
Business Requirements
Core functionality
Users must be able to access accounts, view balances, view recent transactions, and deposit checks by using the UWP app.
Usability
The app must use industry proven design patterns across the app. All navigational elements must be visible at all times.
Security
The app must provide secure transactions to protect customer privacy.
Technical Requirements
Data
The app must use a file based database. You must use a code first entity framework approach.
User interface
You must use a Model-View-ViewModel (MVVM) pattern.

Users must be able to access all content through the top-level navigation after they sign in.

The app must allow the user to upload up to 50 images (front and back) of checks to deposit.

During the upload process, the app must be responsive to any other user actions.

The app must only upload images when no other pending inputs are in the queue.

You must implement the following pages:

Network and web service
The app must meet the following requirements related to networking and web services:
Connect to a web service over a secure HTTP connection to upload images.

Connect to Fabrikam's core web service to retrieve account information.

Use networking technology already available in the .Net Framework.

Consume the JSON that the Fabrikam core web service provides.

User data and alerts
The app must meet the following requirements related to user data and alerts:
Download new monthly bank statements when possible. The download process must not affect the

performance of the app.
Report to the user when the statements are downloaded to the device.

Write a log entry when statement downloads are not successful.

Periodically check for user activity and automatically log the user out when there is no activity for more

than 15 minutes.
Security
The app must meet the following requirements related to security:
Use a multi-factor authentication (MFA) by using email and a verification code to identify the user.

Securely store credentials and retrieve credentials.

Automatically sign in the user irrespective of the device that is used to sign in to the app.

Store the resource name within the app itself.

Connect to an authentication app by using the URI schema fabrikam-security://oauth/.

Application Structure
AccountContext.cs
Relevant portions of the app files are shown below. Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.

ImageManager.cs
Relevant portions of the app files are shown below. Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.

ClientProxy.cs
Relevant portions of the app files are shown below. Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.

BkgTaskMgr.cs
Relevant portions of the app files are shown below. Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.

CredentialManager.cs
Relevant portions of the app files are shown below. Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.

MainPage.cs
Relevant portions of the app files are shown below. Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.

You need to download the bank statements and alert the user when the download is complete.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:

Answer:
Explanation:

Explanation/Reference:
Explanation:
From Scenario:
The app must meet the following requirements related to user data and alerts:
Download new monthly bank statements when possible. The download process must not affect the

performance of the app.
Report to the user when the statements are downloaded to the device.

Write a log entry when statement downloads are not successful.

You can run code in the background by writing classes that implement the IBackgroundTask interface.
If you run any asynchronous code in your background task, then your background task needs to use a deferral. If you don't use a deferral, then the background task process can terminate unexpectedly if the Run method completes before your asynchronous method call has completed.
Request the deferral in the Run method before calling the asynchronous method. Save the deferral to a global variable so it can be accessed from the asynchronous method. Declare the deferral complete after the asynchronous code completes.
Reference: https://docs.microsoft.com/en-us/windows/uwp/launch-resume/create-and-register-a- background-task