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Oracle 1z0-882 Exam With Confidence Using Practice Dumps

Exam Code:
1z0-882
Exam Name:
Oracle Certified Professional, MySQL 5.6 Developer
Certification:
Oracle Other Certification
Vendor:
Oracle
Questions:
100
Last Updated:
Dec 22, 2024
Exam Status:
Stable
Oracle 1z0-882

1z0-882: Oracle Other Certification Exam 2024 Study Guide Pdf and Test Engine

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Oracle Certified Professional, MySQL 5.6 Developer Questions and Answers

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Question 1

As a developer, you inherit this table as part of a project:

CREATE TABLE exam (

Exam_id INTEGER UNSIGNED NOT NULL PRIMARY KEY,

Examinee_id INTEGER UNSIGNED UNIQUE,

Score INTEGER UNSIGNED

)

What change should you make to ensure that examinee_id is an integer value throughout the table?

Options:

A.

The examinee_id column should be designated as PRIMARY KEY.

B.

A NOT NULL qualifier should be moved from exam-id to examinee-id.

C.

The PRIMARY KEY should be dropped and re-created as PRIMARY KEY (examinee-id, exam_id).

D.

A NOT NULL qualifier should be added to examinee_id.

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Question 2

You attempt to create a temporary table by using the following statement:

CREATE TEMPORARY TABLE employeesMAIN

SELECT * FROM employees1

UNION ALL

SELECT * FROM employees2;

What is the result?

Options:

A.

An error is produced because you cannot create a TEMPORARY TABLE with a UNION.

B.

The employees common to both tables exist in employees MAIN.

C.

A unique list of employees exist in employeesMAIN.

D.

All rows from both tables exist in employeesMAIN.

Question 3

Which three statements describe valid reasons why queries that use “SELECT” construct are discouraged?

Options:

A.

SELECT * may cause more data than you need to be read from disk if your application needs only some columns.

B.

SELECT * causes more data than you need to be sent via the client/server protocol if your application needs only some columns.

C.

SELECT * prevents the use of indexes, so a full table scan for every query.

D.

SELECT *causes your application to depend on the columns present when you wrote it , so your application could break if the table structure changes.

E.

SELECT * causes the statements to return all rows from the table.

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