Oracle Certification

B. When a ROLLBACK command is executed

D. When a data definition language statement is executed

E. When a TRUNCATE statement is executed after the pending transaction

1) Drop will drop the records from the table along with its structure.All the indexes associated with it will also deleted and there is no rollback.

2) Delete will deletes the records of the table but the structure of the table is retained back.It is a DML operation which is slower but provides rollback facility.

3) Truncate is a DDL command which is faster ,retain structure of the table and rollback is possible.It allocates memory usually after truncating so structure is retained.

Applications can create multiple databases with in a single file.This is useful when database are both numerous and reasonably small in order to avoid creating a large number of underlying files.Putting multiple databases in a single physical file is an administrative convenience and unlikely to affectdatabase performance.

A. The default internal storage of dates is in the numeric format

D. The RR date format automatically calculates the century from the SYSDATE function but allows

the user to enter the century if required

B. SELECT cust_last_name,cust_credit_limit

FROM customers

ORDER BY cust_credit_limit;

C. SELECT cust_last_name,cust_credit_limit

FROM customers

ORDER BY cust_credit_limit NULLS LAST;

C. A view that is created with the subquery having the pseudo column ROWNUM keyword cannot

be updated

D. A Data Manipulation Language (DML) operation can be performed on a view that is created

with the subquery having all the NOT NULL columns of a table

C. A view that is created with the subquery having the pseudo column ROWNUM keyword cannot

be updated

D. A Data Manipulation Language (DML) operation can be performed on a view that is created

with the subquery having all the NOT NULL columns of a table

A. When a table is dropped, the corresponding indexes are automatically dropped

C. A nondeferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically creates a

unique index

D. For each data manipulation language operation performed, the corresponding indexes are

automatically updated

C. CURRVAL is used to refer to the last sequence number that has been generated

D. When the MAXVALUE limit for a sequence for reached, you can increase the MAXVALUE limit

by using the ALTER SEQUENCE statement

B. A columns with the UNIQUE constraint can contain NULL values

D. A constraint can be disabled even if the constraint column contains data

Locally Managed Tablespaces Include the following Benefits:

1.Free extents are managed in the Tablespace.

2.Bitmap is used to record free extents.

3.Each bit corresponds to a block or a group of block.

4.Bit value indicates free or used.

A. COMMIT

C. CREATE

D. ROLLBACK

C. It removes all the rows in the table and deleted rows can be rolled back

D. They always return a single result row for every row of a queried table

E. They can return a data type value different from the one that is reference

When we set to PARALLEL_ADAPTIVE_MULTI_USER true enables an adaptive algorithm designed to improve performance in multiuser environments that use parallel execution. The algorithm automatically reduces the request degree of parallelism based on the degree at the system load at query startup time.

We will migrate a row when an update to that row would cause it to not fit on the block anymore (with all of the other data that exists there currently). A migration means that the entire row will move and we just leave behind the. So, the original block just has the rowid of the new block and the entire row is moved.

Row chaining nstead of just having a forwarding address on one block and the data on another we have data on two or more blocks.

A. Only One LONG column can be used per table

D. The minimum column width that can be specified for a VARCHAR2 data type column is one

E. The value for a CHAR data type column is blanked-padded to the maximum defined column

width

STANDBY_ARCHIVE_DEST is relevant only for a standby database in managed recovery mode. It specifies the location of archive logs arriving from a primary database.

Primary Key is unique Key entire the table and which is

also NOT NULL

where as foriegn key is the null & which references the

primary key .

B. SELECT SYSDATE - TO_DATE('01/JANUARY/2007') FROM DUAL;

C. SELECT SYSDATE - TO_DATE('01-JANUARY-2007) FROM DUAL;