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API
Java 
String Class
After running this, what is the value of s3?
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
A. "helloo"
B. "HELLOO" 
C. "HELLOL"
D. "HELLO!"
E. "hello!"
After running this, what is the value of s3?
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
A. "helloo"
B. "HELLOO" 
C. "HELLOL"
D. "HELLO!"
E. "hello!"
After running this, what is the value of s3?
s2 "world!"
s1
"hello"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1
"hello"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
"hello"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
"hello"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
"hello"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
0 1 2 3 4 5 …               11
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
0 1 2 3 4 5 …               11
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
0 1 2 3 4 5 …               11
"hello"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
0 1 2 3 4 5 …               11
"hello"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
"hello"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
0 1 2 3 4 5 …               11
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
"hello"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
0 1 2 3 4 5 …               11
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
"hello!"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
0 1 2 3 4 5 …               11
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
"hello!"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
0 1 2 3 4 5 …               11
After running this, what is the value of s3?
s2 "world!"
s1 "hello world!"
12numChars
"hello!"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
0 1 2 3 4 5 …               11
After running this, what is the value of s3?
s2
s1 "hello world!"
12numChars
"hello!"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
0 1 2 3 4 5 …               11
After running this, what is the value of s3?
s2
s1 "hello world!"
12numChars
"hello!"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java
After running this, what is the value of s3?
s2
s1 "hello world!"
s3 "HELLO!"
12numChars
"hello!"
String s1 = "hello";
String s2 = "world!";
s1 = s1 + " " + s2;
int numChars = s1.length();
s2 = s1.substring(0, 5)
+ s1.charAt(numChars - 1);
String s3 = s2.toUpperCase(); 
Java