Free Access Oracle.1Z0-082.v2022-02-11.q110 Practice Test (Page 19)

Question 86

The SCOTT/TIGER user exists in two databases, BOSTON_DB and DALLAS_DB, in two different locations.
Each database has a tnsnames.ora file defining DALLAS_DB as a service name.
Examine this command:
CREATE DATABASE LINK dblink1 CONNECT TO scott IDENTIFIED BY tiger USING
`dallas_db';
How do you execute the command so that only SCOTT in BOSTON_DB can access the SCOTT schema in DALLAS_DB?

A.as SYS in both the databases

B.as SCOTT in BOSTON_DB

C.as SCOTT in BOSTON_DB and SYS in DALLAS_DB

D.as SCOTT in both the databases

E.as SCOTT in DALLAS_DB

Question 87

Which three statements are true about table data storage in an Oracle Database? (Choose three.)

A.Data block headers contain their own Data Block Address (DBA)

B.A table row piece can be chained across several database blocks

C.Multiple row pieces from the same row may be stored in different database blocks

D.Multiple row pieces from the same row may be stored in the same block

E.Data block free space is always contiguous in the middle of the block

F.Index block free space is always contiguous in the middle of the block

Question 88

Which three statements are true about Oracle synonyms? (Choose three.)

A.A synonym cannot be created for a PL/SQL package

B.A synonym can be available to all users

C.A SEQUENCE can have a synonym

D.A synonym created by one user can refer to an object belonging to another user

E.Any user can drop a PUBLIC synonym

Question 89

The CUSTOMERS table has a CUST_CREDIT_LIMIT column of data type NUMBER.
Which two queries execute successfully? (Choose two.)

A.SELECT NVL(cust_credit_limit * .15, 'Not Available') FROM customers;

B.SELECT NVL2(cust_credit_limit * .15, 'Not Available') FROM customers;

C.SELECT NVL2(cust_credit_limit, TO_CHAR(cust_credit_limit * .15), 'Not Available') FROM customers;

D.SELECT TO_CHAR(NVL(cust_credit_limit * .15, 'Not Available')) FROM customers;

E.SELECT NVL(TO_CHAR(cust_credit_limit * .15), 'Not Available') FROM customers;

Question 90

You want to write a query that prompts for two column names and the WHERE condition each time it is executed in a session but only prompts for the table name the first time it is executed.
The variables used in your query are never undefined in your session.
Which query can be used?
SELECT &&col1, &&col2

A.FROM &table
WHERE '&&condition' = '&cond';
SELECT &&col1, &&col2

B.FROM "&table"
WHERE &condition;
SELECT '&&col1', '&&col2'

C.FROM &table
WHERE &&condition = &&cond;
SELECT &col1, &col2

D.FROM &&table
WHERE &condition;
SELECT &col1, &col2

E.FROM &table
WHERE &&condition;

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Question 86

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