Answer Posted / prepareinterview

1. What are the components of physical database structure of
Oracle database?
Oracle database is comprised of three types of files. One or
more datafiles, two are more redo log files, and one or more
control files.

2. What are the components of logical database structure of
Oracle database?
There are tablespaces and database's schema objects.

3. What is a tablespace?
A database is divided into Logical Storage Unit called
tablespaces. A tablespace is used to grouped related logical
structures together.

4. What is SYSTEM tablespace and when is it created?
Every Oracle database contains a tablespace named SYSTEM,
which is automatically created when the database is created.
The SYSTEM tablespace always contains the data dictionary
tables for the entire database.

5. Explain the relationship among database, tablespace and
data file.
Each databases logically divided into one or more
tablespaces one or more data files are explicitly created
for each tablespace.

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[ERROR] [main 11:01:20] (JCLLoggerAdapter.java:error:454) Unsuccessful: alter table user.CEN_USER_MASTER add constraint FKF4EDEDC3D0BAAE75 foreign key (ROLE_ID) references user.CEN_ROLE_MASTER [ERROR] [main 11:01:20] (JCLLoggerAdapter.java:error:454) ORA-02275: such a referential constraint already exists in the table

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ORA-07497: sdpri: cannot create trace file 'string'; errno = string.

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ORA-26094: stream format error: input column overflow

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ORA-16626: failed to enable specified object

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When i am connect database through toad,one error occured. ORA-12514: TNS:listener does not currently know of service requested in connect descriptor. plz help me thanks advance.............

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How to resolve QSM-01108 error. I have no OR conditions in my query, but do have 9 IN conditions. The error says the max limit is 2 while I have 257 number of disjuncts. However, if I remove even a single IN condition, the query is rewritten. I cannot change my query. How can I resolve this issue?

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when i ran any workflow or session, getting below error: seesion task instance[s_xxx]: Execution terminated unexpecterdly

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ORA-26084: direct path context already finished

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if the lengths of two wires are same and the area of cross sections is 4:7 then what will be the ratio of current passing through these wires

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IMP-00060: Warning: Skipping table "string"."string" because object type "string"."string" does not exist or has different identifier

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NZE-28868: Peer certificate chain check failed.

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ORA-26076: cannot set or reset value after direct path structure is allocated

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IMP-00064: Definition of LOB was truncated by export

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IMP-00063: Warning: Skipping table "string"."string" because object type "string"."string" cannot be created or has different identifier

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RMAN-05017: no copy of datafile number found to recover

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