IT-Elec1C Review
c
1. Which of the following advanced OOP features is/are not supported by PHP? i) Method overloading ii) Multiple Inheritance iii) Namespaces iv) Object Cloning a) All of the mentioned b) None of the mentioned c) i) and ii) d) iii) and iv)
setters
A mutator method is also called as _______________.
1
At least how many abstract methods must an abstract class contain?
a
Atleast how many abstract methods must an abstract class contain? a) None b) One c) Two d) Five
cross-site scripting
The attack which involves the insertion of malicious code into a page frequented by other users is known as ______________________.
Parent Class
The class from which the child class inherits is called _____________. i) Child class ii) Parent class iii) Super class iv) Base class
d
The class from which the child class inherits is called.. i) Child class ii) Parent class iii) Super class iv) Base class a) Only i) b) ii), iii) and iv) c) Only iii) d) ii) and iv)
internal
The default access modifier used in a class is _____________.
concatenation
The left associative dot operator (.) is used in PHP is for ___________________.
class instantiation
The practice of creating objects based on predefined classes is often referred to as ______________.
Encapsulation
The practice of separating the user from the true inner workings of an application through well-known interfaces is known as ____________.
integer
Trace the odd data type.
c
When you use the $_GET variable to collect data, the data is visible to.. a) none b) only you c) everyone d) selected few
only you
When you use the $_POST variable to collect data, the data is visible to _____.
Method chaining
Which feature allows us to call more than one method or function of the class in single instruction?
static
Which keyword allows class members (methods and properties) to be used without needing to instantiate a new instance of the class?
d
Which keyword is used to put a stop on inheritance? a) stop b) end c) break d) final
this
Which keyword is used to refer to properties or methods within the class itself
private
Which method or property can only be accessed from within the enclosing class? Even subclasses have no access
final
Which method scope prevents a method from being overridden by a subclass?
Array and Object
Which of following are compound data type?
<hr/>
Which of the below symbols is a newline character?
v
Which of the conditional statements is/are supported by PHP? i) if statements ii) if-else statements iii) if-elseif statements iv) switch statements v) All of the above
i
Which of the following is/are the right way to declare a method? (i) function functionName() { function body } (ii) scope function functionName() { function body } (iii) method methodName() { method body } (iv) scope method methodName() { method body }
i
Which of the following is/are the right way to declare a method? i) function functionName() { function body } ii) scope function functionName() { function body } iii) method methodName() { method body } iv) scope method methodName() { method body }
a
Which of the following is/are true for an abstract class? i) A class is declared abstract by prefacing the definition with the word abstract. ii) A class is declare abstract by using the keyword implements. iii) It is a class that really isn't supposed to ever be instantiated but instead serves as a base class. iv) Attempting to instantiate an abstract class results in an error. a) Only ii) b) All of the mentioned c) ii) and iv) d) ii), iii) and iv)
b
Which of the following statements is/are true about Constructors in PHP? i) PHP 4 introduced class constructors. ii) Constructors can accept parameters. iii) Constructors can call class methods or other functions. iv) Class constructors can call on other constructors. -- a) i) b) All of the mentioned c) None of the mentioned d) ii), iii) and iv)
Polymorphism
Which of the following term originates from the Greek language that means "having multiple forms," defines OOP's ability to redefine, a class's characteristics?
All
Which of the looping statements is/are supported by PHP? i) for loop ii) while loop iii) do-while loop iv) foreach loop
b
Which one of the following class can not be instantiated? a) inherited class b) abstract class c) constant class d) every class
d
Which one of the following is the correct abstract method? a) public function write() b) abstract function write() c) abstract public write(); d) abstract public function write();
c
Which one of the following keyword is used in conjunction with an Exception object? a) throws b) exception c) throw d) final
extends
Which one of the following keyword is used to inherit our subclass into a superclass? a) extends b) implements c) inherit d) include
abstract
Which one of the following keywords is used to define an abstract class?
friendly
Which one of the following property scopes is not supported by PHP?
Get
Which one of the following should not be used while sending passwords or other sensitive information?
PHP5
Which version of PHP introduced class type?
Version 5
Which version of PHP introduced the advanced concepts of OOP?
PHP5
Which version of PHP introduced the instanceof keyword?
c
What will be the output of the following PHP code? <?php class MyClass { } class NotMyClass { } $a = new MyClass; var_dump($a instanceof MyClass); var_dump($a instanceof NotMyClass); ?> a) bool(true) bool(true) b) bool(false) bool(false) c) bool(true) bool(false) d) bool(false) bool(true)
1
What will be the output of the following PHP code ? <?php $i = 0;$j = 1;$k = 2; print (( + + $i + $j) >! ($j - $k)); ?>
infinite loop
What will be the output of the following PHP code ? <?php for ($i = 0; $i< 5; $i++) { for ($j = $i; $j > 0; $i--) print $i; } ?>
0
What will be the output of the following PHP code ? <?php for ($i = 0; 0; $i++) { print"i"; } ?>
11111213
What will be the output of the following PHP code ? <?php $a = 10; echo ++$a; echo $a++; echo $a; echo ++$a; ?>
11
What will be the output of the following PHP code ? <?php $a = 12; --$a; echo $a++; ?>
Toyota
What will be the output of the following PHP code ? <?php $cars = array("Volvo", "BMW", "Toyota"); print $cars[2]; ?>
infinite loop
What will be the output of the following PHP code ? <?php $i = 0; while ($i = 10 ) { print "hi"; } print "hello"; ?>
True0
What will be the output of the following PHP code ? <?php $i = 10; $j = 0; if ($i || ($j = $i + 10)) { echo "true"; } echo $j; ?>
0
What will be the output of the following PHP code ? <?php $one = "Hello"; $two = "World"; echo "$one"+"$two"; ?>
11
What will be the output of the following PHP code ? <?php $one = 1; print($one); print $one; ?>
Testthisalsothisalso
What will be the output of the following PHP code ? <?php $x = "test"; $y = "this"; $z = "also"; $x .= $y .= $z ; echo $x; echo $y; ?>
How are u
What will be the output of the following PHP code ? <?php $x = 0; if ($x++) print "hi"; else print "how are u"; ?>
True32
What will be the output of the following PHP code ? <?php $x = 1; $y = 2; if (++$x == $y++) { echo "true ", $y, $x; } ?>
24
What will be the output of the following PHP code ? <?php echo 5 * 9 / 3 + 9; ?>
Hello world I am learning PHP
What will be the output of the following PHP code ? <?php echo "Hello world </br> I am learning PHP"; ?>
Bool(true) bool(true)
What will be the output of the following PHP code? <?php class ParentClass { } class MyClass extends ParentClass { } $a = new MyClass; var_dump($a instanceofMyClass); var_dump($a instanceofParentClass); ?>
Bool(true) bool(true)
What will be the output of the following PHP code? <?php interface MyInterface { } class MyClass implements MyInterface { } $a = new MyClass; var_dump($a instanceofMyClass); var_dump($a instanceofMyInterface); ?>
1
What will be the output of the following PHP code? <?php $a = 5; $b = 5; echo ($a === $b); ?>
a
What will be the output of the following PHP code? <?php $num = 10; echo 'What is her age? \n She is $num years old'; ?> a) What is her age? \n She is $num years old b) What is her age? She is $num years old c) What is her age? She is 10 years old d) What is her age? She is 10 years old
I love arsenalI love manc
What will be the output of the following PHP code? <?php $team = "arsenal"; switch ($team) { case "manu": echo "I love man u"; case "arsenal": echo "I love arsenal"; case "manc": echo "I love manc"; } ?>
a
Inheritance is the means by which one or more classes can be derived from a/an ___ class. a) base b) abstract c) null d) predefined
No
Is PHP whitespace sensitive?
AshleyBaleBlank
What will be the output of the following PHP code? <?php $user = array("Ashley", "Bale", "Shrek", "Blank"); for ($x=0; $x < count($user); $x++) { if ($user[$x] == "Shrek") continue; printf ($user[$x]); } ?>
Bool(true) bool(false)
What will be the output of the following PHP code? <?php class MyClass { } class NotMyClass { } $a = new MyClass; var_dump($a instanceofMyClass); var_dump($a instanceofNotMyClass); ?>
a
PHP provides built-in interceptor methods, which can intercept messages sent to undefined methods and properties. This is also known as ___. a) overloading b) overriding c) overbending d) overbinding
construct()
PHP recognizes constructors by the name _____________.
4
What will be the output of the following PHP code? <?php $a = '4' ; print + + $a; ?>
How are u
What will be the output of the following PHP code? <?php $x; if ($x) { print "hi" ; } else { print "how are u"; } ?>
Hidden Variables
Identify the variable scope that is not supported by PHP.
5
If $a = 12 what will be returned when ($a == 12) ?5 : 1 is executed?
c
If one intends to create a model that will be assumed by a number of closely related objects, which class must be used? a) Normal class b) Static class c) Abstract class d) Interface
interface
If your object must inherit behavior from a number of sources you must use a/an __________.
static
Variable scope on which a variable does not loose its value when the function exists and use that value if the function is called again is _______________.
Blank
What is the value of $a and $b after the function call? <?php function doSomething( &$arg ) { $return = $arg; $arg += 1; return $return; } $a = 3; $b = doSomething( $a ); ?>
b
What is the value of $a and $b after the function call? <?php function doSomething( &$arg ) { $return = $arg; $arg += 1; return $return; } $a = 3; $b = doSomething( $a ); ?> a) a is 3 and b is 4. b) a is 4 and b is 3. c) Both are 3. d) Both are 4.
::
What should be used to refer to a method in the context of a class rather than an object you use?
1
What will be the output of the following PHP code ? <?php $i = 0; $j = 1; $k = 2; print !(($i + $k) < ($j - $k)); ?>
