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Assuming that s and t are Strings, which of the following code fragments are such that the value returned by s. indexOf( t ) before the code is executed is equal to the value of the int n after the code is executed? I. int n = -1;
int tSize = t. length();
boolean found = false;
while ( !found && tSize <= s. length() )
{
n++;
if ( t. equals( s. substring( 0, tSize ) ) )
found = true;
else
s = s. substring( 1 );
}
if ( !found )
n = -1;
II. int n = -1;
int sSize = s. length();
int tSize = t. length();
boolean found = false;
while ( !found && n + tSize + 1 <= sSize )
{
n++;
if ( t. equals( s. substring( n, n + tSize ) ) )
found = true;
}
if ( !found )
n = -1;
III. int n = 0;
int sSize = s. length();
int tSize = t. length();
boolean found = false;
while ( !found && n + tSize <= sSize )
{
if ( t. equals( s. substring( n, n + tSize ) ) )
found = true;
n++;
}
if ( found )
n--;
else
n = -1;
A. I only
B. II only
C. III only
D. I and II only
E. I, II, and III

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Answers: 1

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