Java Fundamentals-3

What is the output of the following String Function:

String s="Gudlavalleru Engineering College";

System.out.println(s.substring(6,15));

• lavalleru Eng

• alleru E

• valleru Eng

• alleru En

Which of the following String classes are not Thread safe

• String

• StringBuffer

• StringBuilder

• StringReader

Which of the string class(es) is/are Mutable

• String

• StringBuilder

• StringBuffer

• StringWriter

What is the output of the following statement:

System.out.println(45+21/3/3+"hai"+1+2+3);

• 47hai6

• 7hai123

• 47hai123

• Compile time Error

• 7hai6

Predict the output of the following code:

String s="CSE,IT,ECE";

System.out.println(s.lastIndexOf('E'));

• 2

• 7

• 9

• 3

String reverse() function is available with the following classes:

• StringBuilder

• StringBuffer

• String

• StringReader

What is the output of the following Statement:

String s1="GECIT";

String s2="GECCSE";

System.out.println(s2.compareTo(s1));

• -6

• 6

• We can't predict (some -ve value)

• 7

What is the output of the following Code:

int a=9,b=8;

a=b-~a-1;

b=a+~b+1;

a=a+~b+1;

System.out.println(a+" : "+b);

• 9 : 8

• 8 : 9

• 8 : 8

• 9 : 9

What is the output of the following code snippet:

import java.util.*;

.......

int a[]={5,6,4,2,9};

System.out.println(Arrays.binarySearch(a,10));

• -1

• Compile time error, because 10 is not exist in array 'a'

• 0

• 10

Console class is belongs to____________

• import java.io.*

• import java.util.*

• import java.lang.*

• import java.applet.*