Skip to main content

PHP Traits - Multiple Choice Questions

PHP Traits - Multiple Choice Questions


A PHP trait is a partial class implementation (i.e. constants, properties and methods) that can be mixed into one or more existing PHP classes. Traits work double duty: they say what a class can do (like an interface), and they provide a modular implementation (like a class). [Modern PHP: New Features and Good Practices By Josh Lockhart]

Try below quiz questions and check your knowledge on PHP Traits.

1) We use . . . . . keyword to declare a trait and . . . . keyword is used in order to include it in a class.

A) Declare, Use
B) Initiate, Include
C) Trait, Use
D) none of above

2)

We can use above trait in any of the class as:
A)
 class Welcomeclass{
 use Trait Welcome;
}
B)
 class Welcomeclass{
 use Welcome:
}
C)
 class Welcomeclass{
 use Welcome;
}
D)
 class Welcomeclass{
 use=> Welcome;
}

3) Methods declared in a class using a trait take precedence over methods declared in the trait. However, methods in a trait will override methods inherited by a class.

A) True
B) False

4) Both namespaces and traits are imported with the 'use' keyword. Where they are imported is different. We import namespaces, classes, interfaces, functions and constants . . . . . of a class definition. We import traits . . . . . a class definition.

A) inside, outside
B) outside, inside

5) Traits do not encourage code reuse.

A) True
B) False

6) The static members in traits are linked to whichever . . . . uses them, rather than the trait itself.

A) class
B) method
C) properties
D) none of above

7) There can be situations where a class uses two traits with the same method and this may cause the code to throw an error. To avoid errors like this, you can use the operator . . . . . .

A) identity
B) union
C) insteadof
D) xor

8) Traits can be further composed of other traits, even supporting the . . . . . . .

A) constants
B) abstract members
C) static members
D) none of above

9) Multiple Interfaces can be used in the same class, and but not multiple traits.

A) True
B) False

10) Unlike abstract class and an interface, traits can be instantiated.

A) True
B) False

Answers
Labels:

Comments

Post a Comment

Popular posts from this blog

Conjunction Worksheet

Practice English Grammar Conjunctions with the below Conjunction worksheet. Apart from this Conjunction worksheet, you can also go through other Conjunction exercises: Conjunction exercise 1 , Conjunction exercise 2 . Co-ordinating Conjunctions A conjunction placed between words, phrases, clauses, or sentences of equal rank, e.g. and, but, or. [ Via ] Correlative Conjunctions They get their name from the fact that they work together (co-) and relate one sentence element to another. Correlative conjunctions include pairs like "both/and," "whether/or," "either/or," "neither/nor," "not/but" and "not only/but also". [ Via ] For example He'd rather run to school than walking. Identify Co-ordinating Conjunctions: 1. Many women and children came to see the movie. 2. I wrote to him, but she did not respond. 3. Her condition became worse, so she was taken to nearby hospital. 4. We should hire a cab, otherwise we will n...
Post a Comment
Read more

50 Top DHCP Multiple Choice Questions and Answers

Below are the list of top 50 DHCP multiple choice questions and answers for freshers beginners and experienced DHCP Multiple Choice Questions and Answers 1. What is the purpose of the DHCP server? A � to provide storage for email B � to translate URLs to IP addresses C � to translate IPv4 addresses to MAC addresses D � to provide an IP configuration information to hosts Answer: D 2. How is the message sent from a PC2 when is first powers on and attempts to contact the DHCP Server? A � Layer 3 unicast B � Layer 3 broadcast C � Layer 3 multicast D � Without any Layer 3 encapsulation Answer: B 3. What is the default behavior of R1 when PC1 requests service from DHCP server? A � Drop the request B � Broadcast the request to R2 and R3 C � Forward the request to R2 D � Broadcast the request to R2, R3 and ISP Answer: A 4. Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict? A. The address is removed from the pool until the conflict is resolved. B. Th...
Post a Comment
Read more

PHP Constructors Multiple Choice Questions

PHP Constructors Multiple Choice Questions 1) PHP recognises constructors by the name . . . . . A) _construct B) __construct C) __constructor D) _constructor 2) In . . . . . constructors, it is important to remember that you have to call the parent constructor explicitly. A) Singleton B) secure C) public D) subclass 3) Constructor and destructor methods have no . . . . . . and are called automatically - they cannot be called explicitly and consequently their declarations need no access specifier. A) parameters B) destructor C) return value D) aproval 4) Unlike constructors, you cannot pass information to a destructor, because you are never sure when its going to be run. A) True B) False 5) You can invoke class constructors that don’t have any relation to the instantiated object by simply prefacing _constructor with the class name like A) classname::__construct() B) classname:__construct() C) classname=>__construct() D) classname->__construct() 6) . . . . . . is...
Post a Comment
Read more