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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-3 section-2

Each section contains 100 MCQs on Object Oriented Concept .
21
The pseudo-variable ...... is available inside any class method when that method is called from within an object context.
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Answer & Solution
Answer: Option D
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22
A class may contain its own .............
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Answer & Solution
Answer: Option E
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23
Child classes are defined using the keyword .....
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Answer & Solution
Answer: Option A
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24
In PHP, the difference between double quote and single quote is that variables . . . . in single quoted strings whereas they . . . . . in double quoted strings.
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Answer & Solution
Answer: Option A
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25
PHP strings are binary-safe (i.e. they can contain null bytes) . Their size is limited only by the amount of memory that is available to PHP.
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Answer & Solution
Answer: Option A
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26
What is the output of below statement? 
Print substr (‘watch out for that tree’,20,5);
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Answer & Solution
Answer: Option C
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27
What is the value of var? 
$var = 'HELLO WORLD!';
$var = ucfirst($var);
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Answer & Solution
Answer: Option D
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28
The functions strtolower() and strtoupper() work on individual characters and not on entire strings.
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Answer & Solution
Answer: Option B
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29
Heredoc's are a great alternative to quoted strings because of increased readability and maintainability.
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Answer & Solution
Answer: Option A
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30
Which of the below is most useful for debugging:
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Answer & Solution
Answer: Option C
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