Questions and answers for exam Preparation

MCQs

Total Questions : 30 | Page 2 of 3 pages

Question 11. Which one of the following is the right way to define a constant?

constant PI = 3.1415?;
const $PI = 3.1415?;
constant PI = '3.1415';
const PI = '3.1415';

Discuss Question

Answer: Option D. -> const PI = '3.1415';

Class constants are created like: const NAME = 'VALUE';

Question 12. Which of the following method scopes is/are not supported by PHP?(i) private(ii) final(iii) static(iv) abstract

Only (ii)
Only (iv)
(ii) and (iv)

Discuss Question

Answer: Option C. -> (ii) and (iv)

PHP supports six method scopes: public, private, final, static, protected and abstract.

Question 13. Which one of the following is the right way to invoke a method?

$object->methodName();
object->methodName();
object::methodName();
$object::methodName();

Discuss Question

Answer: Option A. -> $object->methodName();

$object->methodName();

Question 14. 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 }

Only (ii)
Only (iv)
(i) and (ii)
(iii) and (iv)

Discuss Question

Answer: Option C. -> (i) and (ii)

In case of public methods, you can forgo explicitly declaring the scope and just declare the method like you would a function.

Question 15. Which one of the following is the right way to call a class constant, given that the class is mathFunction?

echo PI;
echo mathFunction->PI;
echo mathFunction::PI;
echo mathFunction=PI;

Discuss Question

Answer: Option C. -> echo mathFunction::PI;

echo mathFunction::PI;

Question 16. The practice of separating the user from the true inner workings of an application through well-known interfaces is known as..

Polymorphism
Inheritance
Encapsulation
Abstraction

Discuss Question

Answer: Option C. -> Encapsulation

Encapsulation

Question 17. The practice of creating objects based on predefined classes is often referred to as..

class creation
object creation
object instantiation
class instantiation

Discuss Question

Answer: Option D. -> class instantiation

class instantiation

Question 18. hich of the following term originates from the Greek language that means "having multiple forms, defines OOP's ability to redefine, a class's characteristic