oDesk PHP test for developer

oDesk PHP test for developer only.

Question.1:The setrawcookie() method of setting cookies is different from PHP standard method of cookie setting as:

a. It does not allow expiry time to be set

b. It can be used only once

c. It does not URL-ENCODE the value on its own

d.It does not allow domain setting

Solution:C

Question.2You need to keep an eye on the existing number of objects of a given class without introducing a non-class varibale. which of the following makes this happen?

a. Add a member varibale that gets incremented in the default constructer and decremented the destructer.

b. Add a local variable that gets incremented in each constructer and decremented in the desructer

c. Add a static member variable that gets incremented in each constructer and decreented in the destructor

d. This cannot be accomplished since the creation of objects is being done dynamically via “new”

Question.3which of the following variable declaration within a class is invalid in PHP5?

a. private $type = “moderate”;

b. var $term = 3;

c. public $amn = “500″;

d. protected $name = ‘Quantes Private Limited’;

Solution:

Question.4which of the following is not valid PHP parser tag?

a. script

b. ?p

c. %

d. ?php;

Solution:

Question.5How can you hide the fact that web pages are written in PHP?

a. By using AddType application/X-httpd-php asp

b. Specify all file names without any dot and extension

c. By using .htaccess diretive in Apeche

d. All of the above

Solution:C

Question.6What is the output of the following code?

$a = 3;

$b = 2;

echo (int)$a/(int)$b

?>

a. 1

b. 1.5

c. 2

d. 3

e. Eroor

Solution:b

Question.7Which one is correct?

a. $s = fwrite (“a string here”);

b. $s = fwrite ($fp,”a string here”);

c. $s = fwrite (“a string here”,$fp);

d. non of the above

Solution:b

Question.8 Which of the following set of operations is not valid in PHP 5?

a. >, >=

b. =,==

c. !==,!==

d. +=, *=

Solution: C

Question.9 Late PHP version support remote file accessing for the functions:

a. include()

b. include_once()

c. require_once()

d. All of the above

Solution: D

Question.10 What will be the output of the following script?

$count=50;

function Argument()

{

$count++;

echo $count;

}

Argument()

?>

a. It will print 50

b. It will print 51

c. It will print 52

d. It will print 1

Solution:D

Question.11 which of the following are used for code reuse?

a. Loops

b. functions

c. Database

d. include files

Solution: B,D

Question.13 which of the following is the corect way of specifying default value?

a. Function GetDiscount($Type = “Special”) {………}

b. Function GetDiscount(Type := “Special”) {………}

c. Function GetDiscount($Type: = “Special”) {………}

d. Function GetDiscount($Type : “Special”) {………}

Solution:

Question.14 Which of the following are ”magic constant’?

a. __LINE__

b. __FILE__

c __PRETTY_FUNCTION__

d __CLASS__

e. __METHOD__

Solution:

Question.15you have defined three variables $to, $subject, and $body to send an email. Which of the following methods would you use for sending an email?

a. mail($to, $subject,$body)

b. sendmail($to, $subject,$body)

c. mail(to, subject,body)

d. sendmail(to, subject,body)

Solution:

Question.16 Which one of the following is turnary operator?

a. &

b. =

c. 

d. ?:

e. +=

f. &&

Solution:D

Question.17What is the result of the following Exprssion?

5+2*4+6

a. 70

b. 19

c. 34

d. 21

 Solution:B

Question.18 The default value of register global in PHP is:

 a. Off

b. On

 Solution:A

Question.19 What would b the outpur of the following code?

$string = ‘good day’;

$string = ucword($string);

echo $string;

?>

a. good day

b. GOOD DAY

c. Good Day

d. non of the above

 Solution: C

Question.20 If you want to pass a value to a function by reference, the correct way is:

a. function ModifyReport(&$Rptfile){}

b. function ModifyReport($Rptfile){}

c. function ModifyReport(ByRef $Rptfile){}

d. function ModifyReport(&Rptfile){}

Solution: D

oDesk Java programming test answer

Question 1 What is the java.net.IDN class in 1.6?

Methods to resolve integrated domain names (IDNs), such domain names are special embedded names
Methods to swap bytes between network byte order and host byte order
Methods to convert internationalized domain names (IDNs) between a normal Unicode representation and an ASCII Compatible Encoding (ACE) representation
This class does not exist
None of the above

Question 2 What will be the output of the following program?public class Test

{
public static void main (String args[]) throws Exception
{
Test o = new Test ();
System.out.println (o.content ());
}public String content () throws Exception
{throw new Exception ("This is an exception on this.content ()");
}private static class B
{public String content ()
{return ''B'';
}
}private static class A extends B
{public String content ()
{return ''A'';
}
}
}

The code will fail to compile
The code will compile but throw an exception at runtime
The code will compile and on running, it will print ''A''
The code will compile and on running, it will print ''B''

Question 3 Which of these interfaces are used by implementations of models for JTable?

TableModel
TableColumnModel
TableSelectionModel
ListModel

Question 4 How many times can classes be nested within a class?

5
8
4
Any number of times

Question 5 One method in your application needs to be synchronized. Which of the following options are correct for synchronization?

public synchronized void Process(void){}
public void Process(){ synchronized(this){ } }
public void synchronized Process(){}
public synchronized void Process(){}

Question 6 What could be the replacement of "//ABC" in the following code?public class Jam

{
public void apple(int i, String s)
{}
//ABC
}

public void apple(String s, int i){}
public int apple(int i, String s){}
public void apple(int i, String mystring){}
public void Apple(int i, String s) {}

Question 7 What will be the output when the following code is compiled and run?public class Test

{
public static void main (String args[])
{
int i;
i = 3;
System.out.println ((int)i * 2.5 / 3.0);
}
}

The code will compile, but it will throw an exception when it is run
The code will compile and it will not produce any output when it is run
The code will fail to compile
The code will print 3
The code will print 2.5
The code will print 2

Question 8 What would happen on trying to compile and run the following code?public class MainCls

{
public static void main(String argv)
{
System.out.println("My Text");
}
}

A compile error will be generated because 'main' is a reserved word and cannot be used for a class
"My Text" will be displayed
The code will compile. A runtime error will occur because 'main' is not properly defined
The code will compile. A runtime error will occur because constructor is not defined

Question 9 What will be the output when this code is compiled and run?public class Test

{
static int x = 10;
public Test ()
{
Bar b = new Bar ();
Bar b1 = new Bar ();
update (b);
update (b1);
}private void update (Bar bar)
{
bar.x = ++x;
System.out.println (bar.x);
}public static void main (String args[])
{
File f = new File("/","autoexec.bat"); b.DataInputStream d = new DataInputStream(System.in);c.RandomAccessFile r = new RandomAccessFile("OutFile"); d.OutputStreamWriter o = newOutputStreamWriter(System.out);
}private class Bar
{public int x = 10;
}
} 

The code will fail to compile
11 12
11 11
12 12

Question 10 Which of the following statement will not compile?

File f = new File("/","autoexec.bat");
DataInputStream d = new DataInputStream(System.in);
RandomAccessFile r = new RandomAccessFile("OutFile");
OutputStreamWriter o = new OutputStreamWriter(System.out);

Question 11 Which of the following are "keywords" in Java?

default
NULL
String
throws

Question 12 Which of the following statements is true of the HashMap class?

It stores information as key/value pairs
Elements are returned in the order they were added
It does not permit null keys
It does not permit null values

Question 13 How does the set collection deal with duplicate elements?

Duplicate values will cause an error at compile time
A set may contain elements that return duplicate values from a call to the equals method
An exception is thrown if you attempt to add an element with a duplicate value
The add method returns false if you attempt to add an element with a duplicate value

Question 14 What is wrong with the following code?class X extends Exception {}

public class Y
{public void foo()
{
try {
b();
}
finally {
ba();
}
catch (MyException e) {}
}
public void b() throws X {
throw new X();
}public void ba() throws RuntimeException {
throw new RuntimeException();
}
}

Nothing is wrong with the code
Finally block should come after the catch block
An empty catch block is not allowed
None of the above

Question 15 Is the following code valid?InetAddress ad = InetAddress.getByName ("195.186.2.111"); 

Yes
No

Question16 What will be the output of this program?public class Test

{
public static void main (String args[])
{
String a, b, c, d;
a = ''Hello1234'';
b = ''Hello'' + String.valueOf(1234);
c = ''Hello'' + ''1234'';
d = new String (new char[]{'H', 'e', 'l', 'l', 'o', '1', '2', '3', '4'});
System.out.print (a == b);
System.out.print ('' '');
System.out.print (a.equals(b));
System.out.print ('' '');
System.out.print (a == c);
System.out.print ('' '');
System.out.print (a.equals(c));
System.out.print ('' '');
System.out.print (a == d);
System.out.print ('' '');
System.out.print (a.equals(d));
System.out.print ('' '');
}
}

true truetruetrue false true
false true truetrue false false
false true truetrue false true
false false true true false true

Question 17 Which of the following cannot apply to constructors?

Name same as class name
Void return type
Can have parameters
Overloading

Question 18 Choose the correct declarations for the main() method which will allow the class to be run as a standalone program.

public void main(String str[])
static public void main(String str[])
public static int main(String str[])
public static void main(String str[])

Question 19 For a class defined inside a method, what rule governs access to the variables of the enclosing method?

The class can only access transient variables
The class can only access static variables
The class can only access final variables
The class can access any variable

Question 20 A method can be defined as native to:

Overcome the limitation of the private scope of a method
Get to access hardware that Java does not know about
Write optimized code for performance in a language such as C/C++
Define a new data type such as an unsigned integer

Question 21 What will be the output of the following line?System.out.println(Math.floor(-2.1)); 

-2
2.0
-3
-3.0

Question 22 For the given variables, which of the following will compile without an error?char c = 'c';

int i = 50;
double d = 80;
long l = 200;
String s = "Goodbye";

s+=i;
i+=s;
c+=s;
c=c+i;