[ PHP Programming MCQS ]

झारखंड में आयोजित होने वाली JPSC, JSSC, JET, झारखंड पुलिस भर्ती परीक्षा आदि के लिए उपयोगी सामान्य अध्ययन।

[ PHP Programming MCQS ]

Useful GK for JPSC, JSSC, JET, Jharkhand Police and other exams.

281. PHP Attribute declare करने के लिए कौन-सा syntax प्रयोग होता है?

[A] @Attribute

[B] #[Attribute]

[C]

[D] [Attribute]

281. Which syntax is used to declare PHP Attributes?

[A] @Attribute

[B] #[Attribute]

[C]

[D] [Attribute]

सही उत्तर: #[Attribute]

व्याख्या: Attributes square bracket syntax का उपयोग करते हैं।

Correct Answer: #[Attribute]

Explanation: Attributes use hash-square-bracket syntax.

282. Attributes का मुख्य उपयोग क्या है?

[A] Metadata Declaration

[B] Database Connection

[C] File Compression

[D] Session Storage

282. What is the main use of Attributes?

[A] Metadata Declaration

[B] Database Connection

[C] File Compression

[D] Session Storage

सही उत्तर: Metadata Declaration

व्याख्या: Classes, methods आदि पर metadata attach करने के लिए।

Correct Answer: Metadata Declaration

Explanation: Attach metadata to classes and methods.

283. PHP Enums किस version में introduce हुए?

[A] PHP 8.0

[B] PHP 8.1

[C] PHP 8.2

[D] PHP 7.4

283. In which PHP version were Enums introduced?

[A] PHP 8.0

[B] PHP 8.1

[C] PHP 8.2

[D] PHP 7.4

सही उत्तर: PHP 8.1

व्याख्या: Type-safe enumerations के लिए।

Correct Answer: PHP 8.1

Explanation: Introduced for type-safe enumerations.

284. Enum का मुख्य लाभ क्या है?

[A] Type Safety

[B] Faster Queries

[C] Smaller Files

[D] Session Sharing

284. What is the main benefit of Enums?

[A] Type Safety

[B] Faster Queries

[C] Smaller Files

[D] Session Sharing

सही उत्तर: Type Safety

व्याख्या: Valid predefined values सुनिश्चित करता है।

Correct Answer: Type Safety

Explanation: Ensures predefined valid values.

285. Backed Enum किस प्रकार की values रख सकता है?

[A] String या Integer

[B] Boolean Only

[C] Array Only

[D] Object Only

285. What values can a Backed Enum hold?

[A] String or Integer

[B] Boolean Only

[C] Array Only

[D] Object Only

सही उत्तर: String या Integer

व्याख्या: Backed Enums scalar values store करते हैं।

Correct Answer: String or Integer

Explanation: Backed enums store scalar values.

286. Readonly Properties किस version में introduce हुईं?

[A] PHP 8.0

[B] PHP 8.1

[C] PHP 8.2

[D] PHP 7.4

286. In which PHP version were Readonly Properties introduced?

[A] PHP 8.0

[B] PHP 8.1

[C] PHP 8.2

[D] PHP 7.4

सही उत्तर: PHP 8.1

व्याख्या: Immutable properties support के लिए।

Correct Answer: PHP 8.1

Explanation: Introduced for immutable properties.

287. Readonly Property को कितनी बार assign किया जा सकता है?

[A] Unlimited

[B] Two Times

[C] One Time

[D] Never

287. How many times can a Readonly Property be assigned?

[A] Unlimited

[B] Two Times

[C] One Time

[D] Never

सही उत्तर: One Time

व्याख्या: Initialization के बाद modify नहीं किया जा सकता।

Correct Answer: One Time

Explanation: Cannot be modified after initialization.

288. WeakMap का मुख्य उद्देश्य क्या है?

[A] Weak Object References

[B] Database Mapping

[C] Route Mapping

[D] Session Mapping

288. What is the main purpose of WeakMap?

[A] Weak Object References

[B] Database Mapping

[C] Route Mapping

[D] Session Mapping

सही उत्तर: Weak Object References

व्याख्या: Objects के garbage collection को allow करता है।

Correct Answer: Weak Object References

Explanation: Allows garbage collection of objects.

289. Dependency Injection Container का कार्य क्या है?

[A] Manage Dependencies

[B] Manage Sessions

[C] Manage Files

[D] Manage CSS

289. What does a Dependency Injection Container do?

[A] Manage Dependencies

[B] Manage Sessions

[C] Manage Files

[D] Manage CSS

सही उत्तर: Manage Dependencies

व्याख्या: Objects और dependencies create एवं resolve करता है।

Correct Answer: Manage Dependencies

Explanation: Creates and resolves object dependencies.

290. PSR-4 किससे संबंधित है?

[A] Autoloading Standard

[B] Database Standard

[C] Session Standard

[D] Encryption Standard

290. PSR-4 is related to?

[A] Autoloading Standard

[B] Database Standard

[C] Session Standard

[D] Encryption Standard

सही उत्तर: Autoloading Standard

व्याख्या: Namespaces आधारित autoloading।

Correct Answer: Autoloading Standard

Explanation: Namespace-based autoloading standard.