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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 Page-6 section-1

Each section contains 100 MCQs on Object Oriented Concept .
51
Which one of the following is the right way to define a constant?
Discuss
Answer & Solution
Answer: Option D
Solution:
Class constants are created like: const NAME = ‘VALUE’;
52
Which one of the following is the right way to call a class constant, given that the class is mathFunction?
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
53
Which one of the following is the right way to invoke a method?
Discuss
Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
54
Which of the following is/are the right way to declare a method?
1. function functionName() { function body }
2. scope function functionName() { function body }
3. method methodName() { method body }
4. scope method methodName() { method body }
Discuss
Answer & Solution
Answer: Option C
Solution:
In case of public methods, you can forgo explicitly declaring the scope and just declare the method like you would a function.
55
Which of the following method scopes is/are not supported by PHP?
1. private
2. final
3. static
4 abstract
Discuss
Answer & Solution
Answer: Option D
Solution:
PHP supports six method scopes: public, private, final, static, protected and abstract.
56
Which method scope prevents a method from being overridden by a subclass?
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
57
Which of the following statements is/are true about Constructors in PHP?
1. PHP 4 introduced class constructors.
2. Constructors can accept parameters.
3. Constructors can call class methods or other functions.
4. Class constructors can call on other constructors.
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
58
PHP recognizes constructors by the name_________
Discuss
Answer & Solution
Answer: Option D
Solution:
A double underscore followed by the construct keyword. Its syntax is function __construct ([ argument1, argument2,…..]) { Class Initialization code }.
59
Which version of PHP introduced the instanceof keyword?
Discuss
Answer & Solution
Answer: Option B
Solution:
Using instanceof keyword we can determine whether an object is an instance of a class. $manager = new Employee() … if ($manager instanceof Employee) echo “True”;
60
Which one of the following functions is used to determine whether a class exists?
Discuss
Answer & Solution
Answer: Option C
Solution:
The class_exist() function returns true or false according to whether the class exists within the currently executing script content.