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NEW QUESTION: 1
In regards to relational database operations using the Structure Query Language (SQL), which of the following is a value that can be bound to a placeholder declared within an SQL statement?
A. An assimilation value
B. A reduction value
C. A resolution value
D. A bind value
Answer: D
Explanation:
A bind value is a value that can be bound to a placeholder declared within an
SQL statement. Usage of Bind Values or Variable can improve the security within your database. Below you have an example using the Oracle database that shows usage without bind variables versus usage with bind variables. Many of the security benefits are listed.
Bind Variables/Values
Bind variables are placeholders for literal values in an SQL query being sent to the server.
Take the example query above: in the old way, data was generally passed to Oracle directly, via Tcl string interpolation. So in the example above, the actual query we send would look like this:
select
foo,
bar,
baz
from some_table, some_other_table
where some_table.id=some_other_table.id
and some_table.condition_p = 'foo'
There are a few problems with this: first, if the literal value is a huge string, then we waste a lot of time in the database server doing useless parsing. Second, if the literal value contains characters like single quotes, we have to be careful to double-quote them, because not quoting them will lead to surprising errors. Third, no type checking occurs on the literal value. Finally, if the Tcl variable is passed in or between web forms or otherwise subject to external modification, there is nothing keeping malicious users from setting the
Tcl variable to some string that changes the query textually. This type of attack, called SQL smuggling, can be very damaging - entire tables can be exposed or have their contents deleted, for example. Another very important reason for using bind variables is performance. Oracle caches all previously parsed queries. If there are values in the where clause, that is how the query is cached. It also performs bind variable susbstitution after parsing the SQL statement. This means that SQL statements that use bind variables will always match (assuming all else is the same) while SQL statements that do not use bind variables will not match unless the values in the statement are exactly the same. This will improve performance considerably.
To fix all these problems, we replace literal values in the query with a placeholder character, and then send the data along after. So the query looks like this:
select
foo,
bar,
baz
from some_table, some_other_table
where some_table.id = some_other_table.id
and some_table.condition_p =?
The '?' character means "This will be filled in later with literal data". In use, you might write code that looks like this:
set statement [prepare_query "
select
foo,
bar,
baz
from some_table, some_other_table
where some_table.id = some_other_table.id
and some_table.condition_p =?
"]
[bind_param $statement 1 $tcl_var]
References:
KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten
Domains of Computer Security, 2001, John Wiley & Sons, Page 47
see also an example for Oracle at:
http://docstore.mik.ua/orelly/linux/dbi/ch05_03.htm

NEW QUESTION: 2
Part 1 "Test Techniques various" Which of the following is a dynamic analysis technique related to improving application performance? 1 credit [K2]
A. Profiling
B. Code complexity analysis
C. Network package sniffing
D. Spelling and grammar checking
Answer: A

NEW QUESTION: 3
Which action takes place when a file checkpoint occurs?
A. All buffers for a checkpointed file that were modified before a specific SCN are written to disk by DBWn and the SCN is stored in the control file.
B. The checkpoint position is advanced in the checkpoint queue.
C. The Database Writer process (DBWn) writes all dirty buffers in the buffer cache to data files.
D. The Log Writer process (LGWR) writes all redo entries in the log buffer to online redo log files.
Answer: C
Explanation:
Explanation/Reference:
Explanation:

NEW QUESTION: 4
다음 기술 중 맬웨어 방지 소프트웨어에 대한 최상의 대안을 제공하는 기술은 무엇입니까?
A. 응용 프로그램 샌드 박싱
B. 호스트 기반 침입 탐지 시스템 (HIDS)
C. 응용 프로그램 허용 목록
D. 호스트 기반 방화벽
Answer: C