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JAVA Strings

JAVA Strings
The String method compareTo() returns

1
an int value
-1
true
false

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JAVA Strings
What will be the output of the following program code?public class Test{ public static void main(String args[]){ String s = "what"; StringBuffer sb = new StringBuffer("what"); System.out.print(sb.equals(s)+","+s.equals(sb)); }}

false,false
true,false
None of these
false,true
true,true

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JAVA Strings
Determine output:public class Test{ public static void main(String args[]){ String str = null; if(str.length() == 0){ System.out.print("1"); } else if(str == null){ System.out.print("2"); } else{ System.out.print("3"); } }}

"1" is printed.
"3" is printed.
An exception is thrown at runtime.
Compilation fails.
"2" is printed.

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JAVA Strings
What will be the output of the following program?public class Test{ public static void main(String args[]){String s1 = "java";String s2 = "java";System.out.println(s1.equals(s2));System.out.println(s1 == s2); }}

false false
true true
true false
false true

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JAVA Strings
How many Constructor String class have?

2
11
None of this
7
13

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JAVA Strings
toString() method is defined in

java.lang.Object
java.lang.String
java.lang.util
None of these

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