Re: a question to question
- From: Hemant K Chitale <hemantkchitale@xxxxxxxxx>
- To: remigiusz.sokolowski@xxxxxxxxxx
- Date: Fri, 14 Jan 2011 19:20:50 +0800
Those suggested answers are "designed" to make you *fail* the exam.
A and F are the correct answers.
Hemant K Chitale
http://hemantoracledba.blogspot.com
sent from my smartphone
On Jan 14, 2011 6:57 PM, "Remigiusz Sokolowski" <
remigiusz.sokolowski@xxxxxxxxxx> wrote:
hi,
just preparing to some exams and found some typical queries on internet
with answers
for example
TK 2: Which two steps are performed the first time any Update statement
is issued after the instance is started ? Choose two
A. Creating the parse tree of the statement
B.Writing the modified data blocks to data files
C.Writing the modified data to the archived redo log files
D.Updating the control file to indicate the most recent checkpoint
E.Updating the data file header to indicate the most recent checkpoint
F. Reading the blocks to database buffer cache if they are not already there
答案：C，D.
-------------------------
The answer is provided as C and D.
But IMHO every query is a subject to parse before execution, and I would
rather tell that blocks to be modified need to be read to buffer cache
before modification and thus prior to writing the modified data to
archived redo logs.
Concluding A and F
Or may be I do not understand the question well as English is not my
primary language.
TIA
Remigiusz
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Remigiusz Sokolowski <remigiusz.sokolowski@xxxxxxxxxx>
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