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Object Oriented Concept MCQ question and answer with solution | PHP Programming

Learn Object Oriented Concept MCQ Questions and answers with easy and logical explanations. Object Oriented Concept MCQ in PHP programming provides all type of technical mcq questions which is important for technical exams, cumpus exams and other entrance examination

Each section contains 100 MCQs on Object Oriented Concept .
1
Which one of the following is not a valid class name?
Discuss
Answer & Solution
Answer: Option D
Solution:
You declare a class with the class keyword and an arbitrary class name. Class names can be any combination of numbers and letters, although they must not begin with a number.
2
Fill in the blank with the best option. An Object is a/an ________ of a class.
Discuss
Answer & Solution
Answer: Option C
Solution:
An object is said to be an instance of its class. It is of the type defined by the class.
3
Which version of PHP introduced the visibility keywords i.e public, private, and protected?
Discuss
Answer & Solution
Answer: Option B
Solution:
In PHP 4, all properties were declared with var keyword, which is identical in effect to using public. For the sake of backward compatibility, PHP 5 accepts var in place of public for properties.
4
Which characters is used to access property variables on an object-by-object basis?
Discuss
Answer & Solution
Answer: Option C
Solution:
Example: $product1->title=”My Life”;
5
Code that uses a class, function, or method is often described as the.
Discuss
Answer & Solution
Answer: Option A
Solution:
Code that uses a class, function, or method is often described as the class’s, function’s, or method’s client or as client code.
6
Which keyword precedes a method name?
Discuss
Answer & Solution
Answer: Option B
Solution:
A method declaration resembles a function declaration. The function keyword precedes a method name, followed by an optional list of argument variables in parentheses.
7
If you omit the visibility keyword in your method declaration, by default the method will be declared as.
Discuss
Answer & Solution
Answer: Option A
Solution:
By declaring a method public, you ensure that it can be invoked from outside of the current object.
8
Which function is used to determine whether the variable’s value is either TRUE or FALSE?
Discuss
Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
9
What will be the output of the following PHP code? 
<?php
class ShopProductWriter
{
    public function write($shopProduct)
    {
      $str = "{$shopProduct->title}: " .$shopProduct->getProducer() ." ({$shopProduct->price})n";
      print $str;
    }
}
$product1 = new ShopProduct( "My Antonia", "Willa", "Cather", 5.99 );
$writer = new ShopProductWriter();
$writer->write( $product1 );
?>
Discuss
Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
10
Which version of PHP introduced class type hints?
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board