OCJP Online Test Series 5 | OCJP Quiz | SCJP Quiz | Java Online Test

Given
public interface Status {
/* insert code here */ int MY_VALUE = 10;
}
Which one is valid on line 12?

Given the following six method names:
addListener
addMouseListener
setMouseListener
deleteMouseListener
removeMouseListener
registerMouseListener
How many of these method names follow JavaBean Listener naming rules?

public static void test(String str) {
int check = 4;
if (check = str.length()) {
System.out.print(str.charAt(check -= 1) +”, “);
} else {
System.out.print(str.charAt(0) + “, “);
}
}

and the invocation:
test(“four”);
test(“tee”);
test(“to”);

What is the result?

class Line {
public static class Point {}
}

class Triangle {
// insert code here
}

Which code, inserted at line 15, creates an instance of the Point class defined in Line?

package util;
public class BitUtils {
public static void process(byte[] b) { /* more code here */ }
}

package app;
public class SomeApp {
public static void main(String[] args) {
byte[] bytes = new byte[256];
// insert code here
}
}

What is required at line 5 in class SomeApp to use the process method of BitUtils?

public class Test {
public enum Dogs {collie, harrier};
public static void main(String [] args) {
Dogs myDog = Dogs.collie;
switch (myDog) {
case collie:
System.out.print(“collie “);
case harrier:
System.out.print(“harrier “);
}
}
}

What is the result?

Given:
class Snoochy {
Boochy booch;
public Snoochy() { booch = new Boochy(this); }
}

class Boochy {
Snoochy snooch;
public Boochy(Snoochy s) { snooch = s; }
}

And the statements:
public static void main(String[] args) {
Snoochy snoog = new Snoochy();
snoog = null;
// more code here
}
Which statement is true about the objects referenced by snoog, snooch, and booch immediately after line
23 executes?

class Test{

static void test() throws Error {
if (true) throw new AssertionError();
System.out.print(“test “);
}
public static void main(String[] args) {
try { test(); }
catch (Exception ex) { System.out.print(“exception “); }
System.out.print(“end “);
}

}

What is the result?

class Payload {
private int weight;
public Payload (int w) { weight = w; }
public void setWeight(int w) { weight = w; }
public String toString() { return Integer.toString(weight); }
}
public class TestPayload {
static void changePayload(Payload p) { /* insert code */ }
public static void main(String[] args) {
Payload p = new Payload(200);
p.setWeight(1024);
changePayload(p);
System.out.println(“p is ” + p);
} }

Which code fragment, inserted at the end of line 12, produces the output p is 420?

public enum Title {
MR(“Mr.”), MRS(“Mrs.”), MS(“Ms.”);
private final String title;
private Title(String t) { title = t; }
public String format(String last, String first) {
return title + ” ” + first + ” ” + last;
}
}
public static void main(String[] args) {
System.out.println(Title.MR.format(“Doe”, “John”));
}

What is the result?

Given:

11. String test = “Test A. Test B. Test C.”;
12. // insert code here
13. String[] result = test.split(regex);
Which regular expression, inserted at line 12, correctly splits test into “Test A”, “Test B”, and “Test C”?

public class BuildStuff {
public static void main(String[] args) {
Boolean test = new Boolean(true);
Integer x = 343;
Integer y = new BuildStuff().go(test, x);
System.out.println(y);
}
int go(Boolean b, int i) {
if(b) return (i/7);
return (i/49);
}
}

What is the result?

import java.util.*;
class Test{

public static Collection get() {
Collection sorted = new LinkedList();
sorted.add(“B”); sorted.add(“C”); sorted.add(“A”);
return sorted;
}
public static void main(String[] args) {
for (Object obj: get()) {
System.out.print(obj + “, “);
}
}

}

What is the result?

public class LineUp {
public static void main(String[] args) {
double d = 12.345;
// insert code here
}
}

Which code fragment, inserted at line 4, produces the output | 12.345|?

public class TestString3 {
public static void main(String[] args) {
// insert code here
System.out.println(s);
}
}

Which two code fragments, inserted independently at line 3, generate the output 4247? (Choose two.)

import java.io.*;
public class Talk {
public static void main(String[] args) {
Console c = new Console();
String pw;
System.out.print(“password: “);
pw = c.readLine();
System.out.println(“got ” + pw);
}
}

If the user types the password aiko when prompted, what is the result?

public class Fo {
static int[] a;
static { a[0]=2; }
public static void main( String[] args ) {}
}

Which exception or error will be thrown when a programmer attempts to run this code?

public class Base {
public static final String FOO = “foo”;
public static void main(String[] args) {
Base b = new Base();
Sub s = new Sub();
System.out.print(Base.FOO);
System.out.print(Sub.FOO);
System.out.print(b.FOO);
System.out.print(s.FOO);
System.out.print(((Base)s).FOO);
} }
class Sub extends Base {public static final String FOO=”bar”;}

What is the result?

import java.util.Date;
import java.text.DateFormat;
DateFormat df;
Date date = new Date();
// insert code here
String s = df.format(date);

Which code fragment, inserted at line 23, allows the code to compile?

Given:
interface A { public void aMethod(); }
interface B { public void bMethod(); }
interface C extends A,B { public void cMethod(); }
class D implements B {
public void bMethod(){}
}
class E extends D implements C {
public void aMethod(){}
public void bMethod(){}
public void cMethod(){}
}

What is the result?