ocpjp Questions
8
Solved
One of the correct answers from OCP Java SE 6 Programmer Practice Exams is:
You can programmatically test wheather assertions have been enabled
without throwing an AssertionError.
How can I ...
5
Is anybody aware of any real life use of the class AtomicLongFieldUpdate?
I have read the description but I have not quite grasped the meaning of it.
Why do I want to know that? Curiosity and for ...
Forgave asked 21/6, 2013 at 16:0
10
Solved
I was just studying OCPJP questions and I found this strange code:
public static void main(String a[]) {
System.out.println(Double.NaN==Double.NaN);
System.out.println(Double.NaN!=Double.NaN);
}...
Jonas asked 11/1, 2012 at 13:2
3
Solved
public class Java{
public static void main(String[] args){
final byte x = 1;
final byte y = 2;
byte z = x + y;//ok
System.out.println(z);
byte a = 1;
byte b = 2;
byte c = a + b; //Compiler...
Majewski asked 27/10, 2012 at 12:3
4
Solved
Can someone explain this code?
public class SneakyThrow {
public static void sneakyThrow(Throwable ex) {
SneakyThrow.<RuntimeException>sneakyThrowInner(ex);
}
private static <T ext...
2
Solved
I'm prepping up for the Java 8 certificate and the following has me puzzled a littlebit, maybe someone can help me with this?
In the example, a Squirrel class is modelled. It has a name and a...
6
I'm preparing for the SCJP (recently rebranded as OCPJP by Oracle) and one particular question that I got wrong on a mock exam has confused me, the answer description doesn't explain things clear e...
Bedstead asked 25/9, 2012 at 18:50
2
I am reading the book of OCA & OCP for java 7 certification and I am trying the exercises of the book with java 8 and I noticed something wired.
I have Class1 class as follows:
package cert;...
Reverse asked 11/4, 2017 at 13:3
1
Solved
I am preparing for an OCPJP 8 exam for the next 2 months
and currently I this one got my attention as I dont understand why
public class BiPredicateTest {
public static void main(String[] args) {
...
Eth asked 25/3, 2017 at 18:10
3
Solved
Code:
public class Foo {
static void test(String s){
System.out.println("String called");
}
static void test(int s){
System.out.println("int called");
}
public static void main(String[] ...
Contribution asked 10/11, 2016 at 6:21
1
Solved
During my studies to the OCPJP8 I've encountered one question which doesn't have very clear answer to me. Consider following code:
public class Animals
{
class Lamb implements Closeable
{
public ...
1
Solved
I am studying for the Java OCP certificate. I am taking mock exams to prepare.
Example program:
public class Quetico {
public static void main(String[] args) {
Pattern p = Pattern.compile(args[...
3
Solved
I was doing a question out of the book oracle_certified_professional_java_se_7_programmer_exams_1z0-804_and_1z0-805 by Ganesh and Sharma.
One question is:
Consider the following program...
4
Solved
Why is the output in this example 1?
public static void main(String[] args){
int[] a = { 1, 2, 3, 4 };
int[] b = { 2, 3, 1, 0 };
System.out.println( a [ (a = b)[3] ] );
}
I thought it wou...
1
Solved
I'm preparing for OCPJP exam and I ran into the following example:
class Test {
public static void main(String args[]) {
String test = "I am preparing for OCPJP";
String[] tokens = test.split("...
2
Solved
I am trying to execute simple query using below DbQuery.java class which uses DbConnector to get a Connection from DriverManager.
note:
I have already included "mysql-connector-java-5.1.25-bin...
Oder asked 6/7, 2013 at 21:47
3
Solved
I am preparing for OCPJP, and I got stuck at the following mock exam question:
Given:
3. interface Animal { void makeNoise(); }
4. class Horse implements Animal {
5. Long weight = 1200L;
6. publ...
Joejoeann asked 29/11, 2012 at 21:8
3
Solved
If enum implements Comparable so why can't compare with < or >?
public class Dream
{
public static void main(String... args)
{
System.out.println(PinSize.BIG == PinSize.BIGGER); //false
Sy...
4
Solved
After reading some of the SCJP certification last night, I got thinking about switch statements and how the expressions are evaluated, and I'm a little puzzled by something.
Java won't let you swi...
Gearhart asked 8/8, 2012 at 10:30
2
Solved
Possible Duplicate:
Inconsistent behavior on java's ==
Integer wrapper objects share the same instances only within the value 127?
I have found the following == behaviour for Int...
3
Solved
In the following program
class ZiggyTest2 {
public static void main(String[] args){
double x = 123.456;
char c = 65;
int i = 65;
System.out.printf("%s",x);
System.out.printf("%b",x);
Sy...
Pimple asked 25/12, 2011 at 14:20
7
Solved
When i run the following example i get the output 0,2,1
class ZiggyTest2{
static int f1(int i) {
System.out.print(i + ",");
return 0;
}
public static void main(String[] args) {
int i ...
2
Solved
In preparation for the SCJP (or OCPJP as it's now known) exam, I'm being caught out by some mock questions regarding pass-by-(reference)value and immutability.
My understanding, is that when you p...
Niedersachsen asked 2/12, 2011 at 13:8
2
Solved
I'm studying up for the SCJP exam, upon doing some mock tests I came across this one :
It asks what is the output of the following :
class TestClass
{
int i = getInt();
int k = 20;
public int ...
15
Solved
I'm studying for the OCPJP exam, and so I have to understand every little strange detail of Java. This includes the order in which the pre- and post-increment operators apply to variables. Th...
Echinoderm asked 7/11, 2011 at 16:0
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