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Oracle 1z0-497 Exam Dumps Questions and Answers

Exam Code: 1z0-497
Vendor: Oracle
Last Update: May 26, 2024
Questions: 150
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Oracle Database 12c Essentials Questions and Answers

Questions 1

Which three statements are true about System Global Area (SGA)?



SGA contains shared memory structures for all Oracle processes running on a single server.


Each server process has its own SGA.


SGA is allocated automatically when a database is started.


SGA is used to speed up queries by caching data blocks, program data, information about database objects, and query results


SGA is allocated automatically when a database is mounted.


SGA is read and written by server and background processes.

Questions 2

Examine the command:

SQL> CREATE TABLE orders(oid NUMBER (6) PRIMARY KEY, odato DATE, ccode NUMBER (6), oamt NUMBER (10, 2)) TABLESPACE users ;

Which two statements are true about the execution of the command?



A CHECK constraint is created on the OID column.


A NOT NULL constraint is created on the OID column.


The ORDERS table is the only object created in the USERS tablespace.


The ORDERS table and a unique index are created in the USERS tablespace.


The ORDERS table is created in the USERS tablespace and a unique index is created on the OID column in the SYSTEM tablespace.

Questions 3

Examine the command below:


object_schema => 'mavis',

object_name => 'cust_info',

column_name => 'emp_id',

policy_name => 'redact_cust_ids',

function_type => DBMS_REDACT.REGEXP,

expression => '1=1',

regexp_pattern => '(\d\d\d)(\d\d)(\d\d\d\d)',

regexp_replace_string => 'XXXXX\3',

regexp_position => 1,

regexp_occurrence => 0,

regexp_match_parameter => 'i',

policy_description => 'Redacts customer IDs',

column_description => 'emp_id contains employee ID numbers');



What do the regexp_pattern and regexp_replace_string parameters accomplish?



They find a pattern of nine digits; break the digits into three groups that contain the first three, the next two and then the last four digits; and replace all digits with XXXXX concatenated with the last four digits.


They find a pattern of six digits; break the digits into two groups that contain the first five, and then the last digit; and replace all digits with XXXXX concatenated with the last digit.


They find a pattern of nine digits and display the digits as XXXXX XX XXXX.


They find a pattern of nine digits and display the first five digits as XXXXX and the last four digits as 3333.