Connections, Processing & Memory Parameters MCQs

8 MCQs — Oracle: Database Server Architecture MCQs

Practice Connections, Processing & Memory Parameters MCQs with correct answers and explanations. These questions are from the Oracle: Database Server Architecture MCQs section.

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Oracle: Database Server Architecture Subcategories

Background & Server Processes	Connections, Processing & Memory Parameters
Instance & Memory Structures	Oracle Net, Environment & Processes
Physical & Logical Storage	Storage Structures & Diagnostics

What is the difference between dedicated and shared server connections?

Dedicated uses one server process per session; shared uses dispatchers and a pool of server processes
Dedicated is faster for backups only
Shared server uses no memory
Dedicated requires RAC

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What are the three main stages of SQL statement processing?

Open, read, close
Compile, link, run
Lock, update, commit
Parse, execute, fetch

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What is a hard parse?

Parsing a statement that is not found in the library cache
Parsing a statement reused from the cache
A parse that fails
A parse of PL/SQL only

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Which initialization parameter caps the total size of the SGA that can be set dynamically?

SGA_FLOOR
MEMORY_LIMIT
SHARED_MAX
SGA_MAX_SIZE

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Which parameter sets the target total PGA memory for all server processes?

PGA_MAX_BUFFER
PROGRAM_MEMORY
PGA_AGGREGATE_TARGET
PGA_LIMIT_ONLY

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What is the large pool used for?

Caching data blocks
Storing parsed SQL
Memory for shared server session data, RMAN I/O and parallel execution buffers
Storing redo entries

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What is a logical read?

Reading a data block from the database buffer cache in memory
Reading from a redo log
Reading a text file
Reading the control file

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Which parameter controls how long undo data is retained, in seconds?

UNDO_LIFE
UNDO_RETENTION
ROLLBACK_TIME
UNDO_HOLD

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