PHP OOP Test - Sanfoundry

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

Inheritance

Abstraction

Polymorphism

Encapsulation

2. Which one of the following can be used to instantiate an object in PHP assuming class name to be Foo?

$obj = new foo ();

obj = new foo ();

$obj = new foo;

$obj = new $foo;

3. 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;

4. 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 }

iii) and iv)

Only ii)

Only iv)

i) and ii)

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

constant PI = "3.1415";

constant PI = '3.1415';

const PI = '3.1415';

const $PI = "3.1415";

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

$object->methodName();

$object::methodName();

object->methodName();

object::methodName();

7. 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?

Abstraction

Differential

Inheritance

Polymorphism

8. Which of the following method scopes is/are not supported by PHP?

i) private
ii) friendly
iii) static
iv) abstract

Only i)

ii) and iv)

Only ii)

Only iv)

9. Which one of the following property scopes is not supported by PHP?

friendly

static

public

final

10. The practice of creating objects based on predefined classes is often referred to as ______________

object creation

object instantiation

class instantiation

class creation