Free Access Oracle.1Z0-082.v2022-03-27.q110 Practice Test (Page 21)

Question 96

Which two statements are true about the rules of precedence for operators? (Choose two.)

A.The concatenation operator | | is always evaluated before addition and subtraction in an expression

B.NULLS influence the precedence of operators in an expression

C.The + binary operator has the highest precedence in an expression in a SQL statement

D.Arithmetic operators with equal precedence are evaluated from left to right within an expression

E.Multiple parentheses can be used to override the default precedence of operators in an expression

Question 97

Your database instance is started with a PFILE.
Examine these parameters:

You want to increase the size of the buffer cache.
Free memory is available to increase the size of the buffer cache.
You execute the command:
SQL> ALTER SYSTEM SET DB_CACHE_SIZE=1024M;
What is the outcome?

A.The value is changed only in the PFILE and takes effect at the next instance startup

B.The value is changed for the current instance and in the PFILE

C.It fails because the SCOPE clause is missing

D.Change is applied to the current instance, but does not persist after instance restart

Question 98

You execute this command:

During the export operation, you detach from the job by using CTRL+C and then execute this command:
Export> STOP_JOB=immediate
Are you sure you wish to stop the job ([yes]/no): yes
Which two statements are true about the job? (Choose two.)

A.You can no longer monitor it

B.You can reattach to it and monitor it

C.It is paused and can be resumed

D.It continues to run in the background

E.It terminates

Question 99

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;

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

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

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

Question 100

Evaluate these commands which execute successfully:

Which two statements are true about the ORD_ITEMS table and the ORD_SEQ sequence? (Choose two.)

A.Column ORD_NO gets the next number from sequence ORD_SEQ whenever a row is inserted into ORD_ITEMS and no explicit value is given for ORD_NO

B.Sequence ORD_SEQ is guaranteed not to generate duplicate numbers

C.Sequence ORD_SEQ cycles back to 1 after every 5000 numbers and can cycle 20 times

D.Any user inserting rows into table ORD_ITEMS must have been granted access to sequence ORD_SEQ

E.If sequence ORD_SEQ is dropped then the default value for column ORD_NO will be NULL for rows inserted into ORD_ITEMS

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