PHP MCQs with answers Page - 122

Here, you will find a collection of MCQ questions on PHP. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Which PHP function outputs JSON with correct headers?

  • (A) echo json_encode()
  • (B) print json_encode()
  • (C) header('Content-Type: application/json')
  • (D) Both 1 and 3

A

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Q. Which PHP OPcache feature improves performance?

  • (A) Caching PHP output
  • (B) Caching compiled bytecode
  • (C) Caching database queries
  • (D) Caching sessions

A

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Q. Which php.ini directive enables OPcache?

  • (A) opcache.enable
  • (B) opcache.start
  • (C) opcache.on
  • (D) opcache.cache

A

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Q. Which PHP function measures script execution time in microseconds?

  • (A) time()
  • (B) microtime()
  • (C) execution_time()
  • (D) script_time()

A

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Q. Which PHP feature enforces strict type checking?

  • (A) declare(strict_types=1)
  • (B) type_check()
  • (C) strict_mode()
  • (D) php_strict()

A

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Q. Which PHP keyword is used to handle exceptions?

  • (A) throw
  • (B) catch
  • (C) try
  • (D) All of the above

A

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Q. Which PHP interface must be implemented to use foreach with objects?

  • (A) Iterator
  • (B) Iterable
  • (C) Traversable
  • (D) ArrayAccess

A

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Q. Which PHP interface allows objects to be accessed like arrays?

  • (A) Iterator
  • (B) Traversable
  • (C) ArrayAccess
  • (D) Countable

A

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Q. Which PHP interface allows count() to work on objects?

  • (A) Countable
  • (B) Iterable
  • (C) Iterator
  • (D) ArrayAccess

A

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Q. Which PHP extension is recommended for secure database access?

  • (A) mysql
  • (B) mysqli
  • (C) PDO
  • (D) odbc

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