📄 multiple-choice quiz 7----9.mht
字号:
pacing:1.5pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes'>
<td width=3D12 nowrap valign=3Dtop style=3D'width:9.0pt;padding:.75pt .75=
pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dright style=3D'text-align:right;mso-paginati=
on:widow-orphan'><span
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>1.</span><s=
pan
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p></o:p></span></p>
</td>
<td width=3D10 style=3D'width:7.2pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>Is it possi=
ble
for a valid transaction to see the modified, yet uncommitted data of anot=
her
valid transaction when the isolation level is set to SERIALIZABLE?</span>=
<span
lang=3DEN-US style=3D'font-size:9.0pt;font-family:Verdana;mso-bidi-font-f=
amily:
SimSun;color:black;mso-font-kerning:0pt'><o:p></o:p></span></p>
</td>
<td width=3D10 style=3D'width:7.2pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
</tr>
</table>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination:w=
idow-orphan'><a
name=3D6860256></a><span lang=3DEN-US style=3D'font-size:12.0pt;font-family=
:SimSun;
mso-bidi-font-family:SimSun;display:none;mso-hide:all;mso-font-kerning:0pt'=
><o:p> </o:p></span></p>
<table class=3DMsoNormalTable border=3D0 cellpadding=3D0 style=3D'mso-cells=
pacing:1.5pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes'>
<td width=3D25 style=3D'width:18.75pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:9.0pt;font-family:Verdana;mso-bidi-font-f=
amily:
SimSun;color:black;mso-font-kerning:0pt'><INPUT TYPE=3D"radio" NAME=3D"68=
60256" VALUE=3D"6860260"></span><span
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>(a) It is <=
i>possible</i>
for a transaction to see the modified, yet uncommitted, data of another
transaction only if both transactions work on the same data, AND both
transactions are NOT concurrent.</span><span lang=3DEN-US style=3D'font-s=
ize:
9.0pt;font-family:Verdana;mso-bidi-font-family:SimSun;color:black;mso-fon=
t-kerning:
0pt'><br>
<INPUT TYPE=3D"radio" NAME=3D"6860256" VALUE=3D"6860258"></span><span lang=
=3DEN-US
style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-family:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>(b) It is <=
i>possible</i>
for a transaction to see the modified, yet uncommitted, data of another
transaction, only if both transactions work on the same data, AND both
transactions are concurrent.</span><span lang=3DEN-US style=3D'font-size:=
9.0pt;
font-family:Verdana;mso-bidi-font-family:SimSun;color:black;mso-font-kern=
ing:
0pt'><br>
<INPUT TYPE=3D"radio" NAME=3D"6860256" VALUE=3D"6860257"></span><span lang=
=3DEN-US
style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-family:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>(c) It is <=
i>possible</i>
for a transaction to see the modified, yet uncommitted, data of another
transaction even if both transactions are not working on the same data, A=
ND
even if both transactions are NOT concurrent.</span><span lang=3DEN-US
style=3D'font-size:9.0pt;font-family:Verdana;mso-bidi-font-family:SimSun;
color:black;mso-font-kerning:0pt'><br>
<INPUT TYPE=3D"radio" CHECKED NAME=3D"6860256" VALUE=3D"6860263"></span><sp=
an
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>(d) It is <=
i>not
possible</i> for a transaction to see the modified, yet uncommitted, data=
of another
transaction, even if both transactions are working on the same data, and =
even
if both transactions are concurrent.</span><span lang=3DEN-US style=3D'fo=
nt-size:
9.0pt;font-family:Verdana;mso-bidi-font-family:SimSun;color:black;mso-fon=
t-kerning:
0pt'> <o:p></o:p></span></p>
</td>
</tr>
</table>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination:w=
idow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;display:none;mso-hide:all;mso-font-kerning:0pt'><o:p> </o:p></s=
pan></p>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center;mso-pagina=
tion:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;mso-font-kerning:0pt'>
<hr size=3D2 width=3D"100%" align=3Dcenter>
</span></div>
<table class=3DMsoNormalTable border=3D0 cellpadding=3D0 style=3D'mso-cells=
pacing:1.5pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes'>
<td width=3D10 style=3D'width:7.2pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
<td width=3D12 nowrap valign=3Dtop style=3D'width:9.0pt;padding:.75pt .75=
pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dright style=3D'text-align:right;mso-paginati=
on:widow-orphan'><span
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>2.</span><s=
pan
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p></o:p></span></p>
</td>
<td width=3D10 style=3D'width:7.2pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>All changes
made by a committed transaction can be recovered</span><span lang=3DEN-US
style=3D'font-size:9.0pt;font-family:Verdana;mso-bidi-font-family:SimSun;
color:black;mso-font-kerning:0pt'><o:p></o:p></span></p>
</td>
<td width=3D10 style=3D'width:7.2pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
</tr>
</table>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination:w=
idow-orphan'><a
name=3D6860261></a><span lang=3DEN-US style=3D'font-size:12.0pt;font-family=
:SimSun;
mso-bidi-font-family:SimSun;display:none;mso-hide:all;mso-font-kerning:0pt'=
><o:p> </o:p></span></p>
<table class=3DMsoNormalTable border=3D0 cellpadding=3D0 style=3D'mso-cells=
pacing:1.5pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes'>
<td width=3D25 style=3D'width:18.75pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:9.0pt;font-family:Verdana;mso-bidi-font-f=
amily:
SimSun;color:black;mso-font-kerning:0pt'><INPUT TYPE=3D"radio" NAME=3D"68=
60261" VALUE=3D"6860269"></span><span
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>(a) only if
there have been no software failures</span><span lang=3DEN-US style=3D'fo=
nt-size:
9.0pt;font-family:Verdana;mso-bidi-font-family:SimSun;color:black;mso-fon=
t-kerning:
0pt'><br>
<INPUT TYPE=3D"radio" CHECKED NAME=3D"6860261" VALUE=3D"6860256"></span><sp=
an
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>(b)
irrespective of whether there have been hardware or software failures</sp=
an><span
lang=3DEN-US style=3D'font-size:9.0pt;font-family:Verdana;mso-bidi-font-f=
amily:
SimSun;color:black;mso-font-kerning:0pt'><br>
<INPUT TYPE=3D"radio" NAME=3D"6860261" VALUE=3D"6860262"></span><span lang=
=3DEN-US
style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-family:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>(c) only if
there have been no hardware failures</span><span lang=3DEN-US style=3D'fo=
nt-size:
9.0pt;font-family:Verdana;mso-bidi-font-family:SimSun;color:black;mso-fon=
t-kerning:
0pt'><br>
<INPUT TYPE=3D"radio" NAME=3D"6860261" VALUE=3D"6860271"></span><span lang=
=3DEN-US
style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-family:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>(d) only if
there have been no software AND no hardware failures</span><span lang=3DE=
N-US
style=3D'font-size:9.0pt;font-family:Verdana;mso-bidi-font-family:SimSun;
color:black;mso-font-kerning:0pt'> <o:p></o:p></span></p>
</td>
</tr>
</table>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination:w=
idow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;display:none;mso-hide:all;mso-font-kerning:0pt'><o:p> </o:p></s=
pan></p>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center;mso-pagina=
tion:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;mso-font-kerning:0pt'>
<hr size=3D2 width=3D"100%" align=3Dcenter>
</span></div>
<table class=3DMsoNormalTable border=3D0 cellpadding=3D0 style=3D'mso-cells=
pacing:1.5pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes'>
<td width=3D10 style=3D'width:7.2pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
<td width=3D12 nowrap valign=3Dtop style=3D'width:9.0pt;padding:.75pt .75=
pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dright style=3D'text-align:right;mso-paginati=
on:widow-orphan'><span
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>3.</span><s=
pan
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p></o:p></span></p>
</td>
<td width=3D10 style=3D'width:7.2pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:9.0pt;mso-bidi-font-size:12.0pt;font-fami=
ly:Verdana;
mso-bidi-font-family:SimSun;color:black;mso-font-kerning:0pt'>In a two-ph=
ase
locking protocol, what happens during the shrinking phase?</span><span
lang=3DEN-US style=3D'font-size:9.0pt;font-family:Verdana;mso-bidi-font-f=
amily:
SimSun;color:black;mso-font-kerning:0pt'><o:p></o:p></span></p>
</td>
<td width=3D10 style=3D'width:7.2pt;padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-pagination=
:widow-orphan'><span
lang=3DEN-US style=3D'font-size:12.0pt;font-family:SimSun;mso-bidi-font-f=
amily:
SimSun;mso-font-kerning:0pt'><o:p> </o:p></span></p>
</td>
</tr>
</table>
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