Welcome to the java lang and java io MCQs Page
Dive deep into the fascinating world of java lang and java io with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of java lang and java io, a crucial aspect of Java Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of java lang and java io, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Java Programming.
Check out the MCQs below to embark on an enriching journey through java lang and java io. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Java Programming.
Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of java lang and java io. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!
java lang and java io MCQs | Page 21 of 26
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String x = "xyz";
x.toUpperCase(); /* Line 2 */
String y = x.replace('Y', 'y');
y = y + "abc";
System.out.println(y);
int i = (int) Math.random();
class A
{
public A(int x){}
}
class B extends A { }
public class test
{
public static void main (String args [])
{
A a = new B();
System.out.println("complete");
}
}
int i = 1, j = 10;
do
{
if(i++ > --j) /* Line 4 */
{
continue;
}
} while (i < 5);
System.out.println("i = " + i + "and j = " + j); /* Line 9 */
public class NFE
{
public static void main(String [] args)
{
String s = "42";
try
{
s = s.concat(".5"); /* Line 8 */
double d = Double.parseDouble(s);
s = Double.toString(d);
int x = (int) Math.ceil(Double.valueOf(s).doubleValue());
System.out.println(x);
}
catch (NumberFormatException e)
{
System.out.println("bad number");
}
}
}
System.out.println(Math.sqrt(-4D));
interface Foo141
{
int k = 0; /* Line 3 */
}
public class Test141 implements Foo141
{
public static void main(String args[])
{
int i;
Test141 test141 = new Test141();
i = test141.k; /* Line 11 */
i = Test141.k;
i = Foo141.k;
}
}
String a = "newspaper";
a = a.substring(5,7);
char b = a.charAt(1);
a = a + b;
System.out.println(a);
public class StringRef
{
public static void main(String [] args)
{
String s1 = "abc";
String s2 = "def";
String s3 = s2; /* Line 7 */
s2 = "ghi";
System.out.println(s1 + s2 + s3);
}
}
public class ExamQuestion7
{
static int j;
static void methodA(int i)
{
boolean b;
do
{
b = i<10 | methodB(4); /* Line 9 */
b = i<10 || methodB(8); /* Line 10 */
}while (!b);
}
static boolean methodB(int i)
{
j += i;
return true;
}
public static void main(String[] args)
{
methodA(0);
System.out.println( "j = " + j );
}
}Suggested Topics
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