Important Oracle Memory Management Interview Preparation Guide Download PDF
Oracle Memory Management Interview Questions and Answers will guide us that Oracle Memory management is the act of managing computer memory. This involves providing ways to allocate partions of memory to programs at their request, and freeing it for reuse when no longer needed. The management of main memory is critical to the computer system. So learn the basics and advance level Oracle Memory Management with the help of this Oracle Memory Management Interview Questions with Answers guide
61 Memory Management Questions and Answers:
Table of Contents:
1 :: What is use of LOG (Ver 7) option in EXP command?
The name of the file which log of the export will be written.
2 :: What is the use of FILE option in IMP command?
The name of the file from which import should be performed.
3 :: What is the use of SHOW option in IMP command?
A flag to indicate whether file content should be displayed or not.
4 :: What is the use of GRANT option in IMP command?
A flag to indicate whether grants on database objects will be imported.
5 :: What is the use of INDEXES option in IMP command?
A flag to indicate whether import should import index on tables or not.
6 :: What is the use of ROWS option in IMP command?
A flag to indicate whether rows should be imported. If this is set to 'N' then only DDL for database objects will be executed.
7 :: What is the use of RECORD option in EXP command?
For Incremental exports, the flag indirects whether a record will be stores data dictionary tables recording the export.
8 :: What is the use of INCTYPE option in EXP command?
Type export should be performed COMPLETE,CUMULATIVE,INCREMENTAL
9 :: What is the use of RECORD LENGTH option in EXP command?
Record length in bytes.
10 :: What is the use of TABLES option in EXP command?
List of tables should be exported.
11 :: What is the use of OWNER option in EXP command?
List of table accounts should be exported.
12 :: What is the use of FULL option in EXP command?
A flag to indicate whether full databse export should be performed.
13 :: What is the use of ANALYSE ( Ver 7) option in EXP command?
A flag to indicate whether statistical information about the exported objects should be written to export dump file.
14 :: What is the use of PARFILE option in EXP command?
Name of the parameter file to be passed for export.
15 :: What is the use of ROWS option in EXP command?
Flag to indicate whether table rows should be exported. If 'N' only DDL statements for the database objects will be created.
16 :: What is the use of INDEXES option in EXP command?
A flag to indicate whether indexes on tables will be exported.
17 :: What is the use of GRANT option in EXP command?
A flag to indicate whether grants on databse objects will be exported or not. Value is 'Y' or 'N'.
18 :: What is the use of FILE option in EXP command?
To give the export file name.
19 :: What is hot backup and how it can be taken?
Taking backup of archive log files when database is open. For this the ARCHIVELOG mode should be enabled. The following files need to be backed up. All data files. All Archive log, redo log files. All control files.
20 :: What is a logical backup?
Logical backup involves reading a set of database records and writing them into a file. Export utility is used for taking backup and Import utility is used to recover from backup.
21 :: What is cold backup? What are the elements of it?
Cold backup is taking backup of all physical files after normal shutdown of database. We need to take.
- All Data files.
- All Control files.
- All on-line redo log files.
- The init.ora file (Optional)
- All Data files.
- All Control files.
- All on-line redo log files.
- The init.ora file (Optional)
22 :: What are the different kind of export backups?
Full back - Complete database
Incremental - Only affected tables from last incremental date/full backup date.
Cumulative backup - Only affected table from the last cumulative date/full backup date.
Incremental - Only affected tables from last incremental date/full backup date.
Cumulative backup - Only affected table from the last cumulative date/full backup date.
23 :: List the factors that can affect the accuracy of the estimations?
The space used transaction entries and a deleted record does not become free immediately after completion due to delayed cleanout.
Trailing nulls and length bytes are not stored. Inserts of, updates to and deletes of rows as well as columns larger than a single datablock, can cause fragmentation and chained row pieces.
Trailing nulls and length bytes are not stored. Inserts of, updates to and deletes of rows as well as columns larger than a single datablock, can cause fragmentation and chained row pieces.
24 :: What is mean by Program Global Area (PGA)?
It is area in memory that is used by a Single Oracle User Process.
25 :: What is a Shared SQL pool?
The data dictionary cache is stored in an area in SGA called the Shared SQL Pool. This will allow sharing of parsed SQL statements among concurrent users.
