কম্পিউটারের যত কথা

একাদশ- দ্বাদশ শ্রেণি - সাধারণ জ্ঞান আন্তর্জাতিক বিষয়াবলী | - | NCTB BOOK
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  • কম্পিউটার শব্দের অর্থ- গণনা করা।
  • কম্পিউটারের জনক- চার্লস ব্যাবেজ।
  • আধুনিক কম্পিউটারের জনক- জন ভন নিউম্যান
  • বিশ্বের প্রথম গণনাকারী যন্ত্র- অ্যাবাকাস। 
  • প্রথম ডিজিটাল কম্পিউটারের আবিষ্কারক- আইকেন।
  • আধুনিক ল্যাপটপের জনক- বিল মোগরিজ। 
  • কম্পিউটারের অস্থায়ী স্মৃতিকে বলা হয়- RAM
  • কম্পিউটারের স্থায়ী স্মৃতিকে বলা হয়- ROM 
  • RAM - Random Access Memory
  • ROM - Read Only Memory
  • VIRUS-Vital Information Resources Under Seize
  • OMR - Optical Mark Reader
  • বিশ্বে প্রথম মিনি কম্পিউটার হচ্ছে- পিডিপি-১
  • বিল গেটসের প্রথম প্রোগ্রাম MS DOS
  • i-pad হচ্ছে- ট্যাবলয়েড কম্পিউটার ।
  • বিশ্বের বৃহত্তম কম্পিউটার মেলার নাম - সিবিট এক্সপো
  •  CEBIT EXPO যাত্রা শুরু করে ১৯৭০ সালে ।
  • কয়েকটি ছোট কম্পিউটার হচ্ছে- ল্যাপটপ, লাইফবুক, নেটবুক প্রথম যান্ত্রিক ক্যালকুলেটর তৈরি করেন।
  •  গণিতবিদ লিবনিজ www বলতে বোঝায়- World Wide Web. 
  • World Wide ভবন এর উদ্ভাবক- টিম বার্নাস লি ।

 

বাংলাদেশে কম্পিউটার স্থাপন

  • বাংলাদেশে ইন্টারনেট চালু হয়- ১৯৯৬ সালে।
  • বাংলাদেশে স্থাপিত প্রথম কম্পিউটার (IBM-1620) 
  • IBM-1620 একটি মেইনফ্রেম কম্পিউটার।
  • IBM-1620 স্থাপিত হয়- পরমাণু শক্তি কমিশনে। 
  • ইন্টারনেট ভিত্তিক প্রথম নিউজ এজেন্সি- বিডি নিউজ।
  • বাংলাদেশের প্রথম পত্রিকার নাম- কম্পিউটার জগৎ (প্রকাশিত ১৯৯১)। 
  • বাংলাদেশের সর্বপ্রথম যে ব্যাংকে কম্পিউটার স্থাপন করা হয়- ইউনাইটেড ব্যাংক।

 

ইন্টারনেট অপারেটিং সফটওয়্যার

  • Mozila firefox
  •  Opera mini
  • এন্ড্রয়েড
  • Java
  • Google Chrome
  • Internet Explorer

 

 সার্চ ইঞ্জিন

  • ইয়াহু (Yahoo)
  • বিং (Bing), আডটকম (Ask.com)
  • গুগল (Google)
  • ইদোয়ো (Yodao)
  •  বাইডু (Baidu)
  • পিপীলিকা- ১ম বাংলা সার্চ ইঞ্জিন
common.content_added_by
Content updated By

# বহুনির্বাচনী প্রশ্ন

ক্ষতিকারক চৌম্বক
ক্ষতিকারক সার্কিট
ক্ষতিকারক প্রোগ্রাম
ক্ষতিকারক জীবানু
টপ রেটেড অ্যাপ

স্যাট অ্যাকাডেমী অ্যাপ

আমাদের অল-ইন-ওয়ান মোবাইল অ্যাপের মাধ্যমে সীমাহীন শেখার সুযোগ উপভোগ করুন।

ভিডিও
লাইভ ক্লাস
এক্সাম
ডাউনলোড করুন
Promotion
;
Request history8.2.28PHP Version224msRequest Duration42MBMemory UsageGET admission/{slug}Route
    • Booting (75.87ms)time
    • Application (148ms)time
    • 1 x Application (66.06%)
      148ms
      1 x Booting (33.94%)
      75.87ms
      316 templates were rendered
      • 1x academy.subject.read_chapterread_chapter.blade.php#?blade
      • 1x academy.include.sidebarListsidebarList.blade.php#?blade
      • 1x academy.include.left_sidebar_menuleft_sidebar_menu.blade.php#?blade
      • 270x academy.include.sidebarSubListsidebarSubList.blade.php#?blade
      • 5x academy.include.question_cardquestion_card.blade.php#?blade
      • 1x common.modal.self_test_modalself_test_modal.blade.php#?blade
      • 1x common.modal.bookmark_modalbookmark_modal.blade.php#?blade
      • 1x common.modal.error_report_modalerror_report_modal.blade.php#?blade
      • 1x common.modal.video_modalvideo_modal.blade.php#?blade
      • 1x common.script.page_type_scriptpage_type_script.blade.php#?blade
      • 1x job.job_include.job_scriptjob_script.blade.php#?blade
      • 1x common.script.activity_scriptactivity_script.blade.php#?blade
      • 1x common.script.test_scripttest_script.blade.php#?blade
      • 1x common.script.custom_dropdowncustom_dropdown.blade.php#?blade
      • 1x common.script.follow_unfollow_scriptfollow_unfollow_script.blade.php#?blade
      • 1x common.script.short_statistics_scriptshort_statistics_script.blade.php#?blade
      • 1x common.script.navigator_sharenavigator_share.blade.php#?blade
      • 1x layouts.satt-appsatt-app.blade.php#?blade
      • 1x includes.header_link2header_link2.blade.php#?blade
      • 1x laravelpwa::metameta.blade.php#?blade
      • 1x layouts.headerheader.blade.php#?blade
      • 1x layouts.toolbartoolbar.blade.php#?blade
      • 2x components.custom-adcustom-ad.blade.php#?blade
      • 1x frontend.downloadourappdownloadourapp.blade.php#?blade
      • 1x frontend.referralreferral.blade.php#?blade
      • 1x auth.user_type_modaluser_type_modal.blade.php#?blade
      • 1x layouts.footerfooter.blade.php#?blade
      • 1x common.login_modallogin_modal.blade.php#?blade
      • 1x components.authentication-card-logoauthentication-card-logo.blade.php#?blade
      • 1x common.includes.promotion_modalpromotion_modal.blade.php#?blade
      • 1x common.includes.notification_item_modalnotification_item_modal.blade.php#?blade
      • 1x common.includes.notification_item_list_modalnotification_item_list_modal.blade.php#?blade
      • 1x common.includes.promotion_offcanvaspromotion_offcanvas.blade.php#?blade
      • 1x includes.footer_link2footer_link2.blade.php#?blade
      • 1x includes.restrictrestrict.blade.php#?blade
      • 1x livewire-alert::components.scriptsscripts.blade.php#?blade
      • 1x livewire-alert::components.flashflash.blade.php#?blade
      • 1x admin.include.toastrtoastr.blade.php#?blade
      • 1x common.search.search_scriptsearch_script.blade.php#?blade
      • 1x common.script.promotion_scriptpromotion_script.blade.php#?blade
      • 1x common.script.promotion_functionspromotion_functions.blade.php#?blade
      • 1x includes.copy_restrictioncopy_restriction.blade.php#?blade
      uri
      GET admission/{slug}
      middleware
      web, throttle:global
      controller
      App\Http\Controllers\Academy\SubjectController@chapter
      namespace
      prefix
      where
      as
      admission.subject.chapter
      file
      app/Http/Controllers/Academy/SubjectController.php:102-110
      26 statements were executed (2 duplicates)Show only duplicates24.15ms
      • SubjectService.php#43satt_satt_mobile_app530μsupdate `subjects` set `view_count` = `view_count` + 1, `subjects`.`updated_at` = '2025-04-18 08:53:09' where `id` = 17306
        Bindings
        • 0: 2025-04-18 08:53:09
        • 1: 17306
        Backtrace
        • app/Services/SubjectService.php:43
        • app/Http/Controllers/Academy/SubjectController.php:105
        • vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:44
        • vendor/laravel/framework/src/Illuminate/Routing/Route.php:266
      • QueryBuilder.php#38satt_satt_mobile_app180μsselect `_lft`, `_rgt` from `subjects` where `id` = 17306 limit 1
        Bindings
        • 0: 17306
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:38
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:60
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:235
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:227
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
      • QueryBuilder.php#305satt_satt_mobile_app250μsselect `id`, `name`, `parent_id`, `_lft`, `_rgt`, `show_content`, `num_of_mcq`, `num_of_written`, `des_added_by`, `des_updated_by`, `author_name`, `link_subject_id`, `sub_category_id`, `main_category_id`, `slug`, `meta_og_title`, `meta_keyword`, `meta_description`, `vote`, `view_count`, `icon`, `page_type`, `chapter_name` from `subjects` where (`subjects`.`_lft` between 20230 and 20231) and `subjects`.`deleted_at` is null
        Bindings
        • 0: 20230
        • 1: 20231
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app180μsselect `id`, `description`, `short_description`, `subject_id` from `subject_descriptions` where `subject_descriptions`.`subject_id` in (17306) and `subject_descriptions`.`deleted_at` is null
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app180μsselect `id`, `name`, `slug` from `sub_categories` where `sub_categories`.`id` in (4878) and `sub_categories`.`deleted_at` is null
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app200μsselect `id`, `user_id`, `completeable_type`, `completeable_id`, `complete_progress`, `is_complete` from `completes` where `completes`.`completeable_id` in (17306) and `completes`.`completeable_type` = 'App\\Models\\Subject'
        Bindings
        • 0: App\Models\Subject
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app150μsselect `id`, `name`, `parent_id`, `_lft`, `_rgt`, `show_content`, `des_added_by`, `des_updated_by`, `author_name`, `link_subject_id` from `subjects` where `subjects`.`id` in (4294) and `subjects`.`deleted_at` is null
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app180μsselect `id`, `description`, `short_description`, `subject_id` from `subject_descriptions` where `subject_descriptions`.`subject_id` in (4294) and `subject_descriptions`.`deleted_at` is null
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app160μsselect `id`, `name`, `avatar` from `users` where `users`.`id` in (33722) and `users`.`deleted_at` is null
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app160μsselect `id`, `name`, `avatar` from `users` where `users`.`id` in (57776) and `users`.`deleted_at` is null
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app1.1msselect * from (select `questions`.`id`, `questions`.`subject_id`, `questions`.`category_id`, `questions`.`sub_category_id`, `questions`.`board_exam_id`, `questions`.`passage_id`, `questions`.`question_type`, `questions`.`question`, `questions`.`is_duplicate`, `questions`.`status`, `questions`.`image`, `subjectables`.`subject_id` as `pivot_subject_id`, `subjectables`.`subjectable_id` as `pivot_subjectable_id`, `subjectables`.`subjectable_type` as `pivot_subjectable_type`, row_number() over (partition by `subjectables`.`subject_id` order by `questions`.`created_at` desc) as `laravel_row` from `questions` inner join `subjectables` on `questions`.`id` = `subjectables`.`subjectable_id` where `subjectables`.`subject_id` in (17306) and `subjectables`.`subjectable_type` = 'App\\Models\\Question' and `questions`.`status` = 'active' and `questions`.`deleted_at` is null) as `laravel_table` where `laravel_row` <= 5 order by `laravel_row`
        Bindings
        • 0: App\Models\Question
        • 1: active
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app490μsselect `id`, `question_id`, `option_1`, `option_2`, `option_3`, `option_4`, `option_5`, `image_option`, `image_question`, `answer` from `question_options` where `question_options`.`question_id` in (106987, 244643, 244648, 249320, 249882) and `question_options`.`deleted_at` is null
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app170μsselect `id`, `name`, `slug` from `subjects` where `subjects`.`id` in (79) and `subjects`.`deleted_at` is null
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app330μsselect `subjects`.`id`, `subjects`.`name`, `subjects`.`slug`, `subjectables`.`subjectable_id` as `pivot_subjectable_id`, `subjectables`.`subject_id` as `pivot_subject_id`, `subjectables`.`subjectable_type` as `pivot_subjectable_type`, `subjectables`.`created_user_id` as `pivot_created_user_id`, `subjectables`.`deleted_at` as `pivot_deleted_at`, `subjectables`.`status` as `pivot_status`, `subjectables`.`created_at` as `pivot_created_at`, `subjectables`.`updated_at` as `pivot_updated_at` from `subjects` inner join `subjectables` on `subjects`.`id` = `subjectables`.`subject_id` where `subjectables`.`subjectable_id` in (106987, 244643, 244648, 249320, 249882) and `subjectables`.`subjectable_type` = 'App\\Models\\Question' and `subjects`.`deleted_at` is null
        Bindings
        • 0: App\Models\Question
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • QueryBuilder.php#305satt_satt_mobile_app320μsselect `id`, `title`, `passage` from `passages` where `passages`.`id` in (0) and `passages`.`deleted_at` is null
        Backtrace
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:285
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
      • SubjectRepository.php#122satt_satt_mobile_app230μsselect * from `subjects` where `subjects`.`id` = 17306 and `subjects`.`deleted_at` is null limit 1
        Bindings
        • 0: 17306
        Backtrace
        • app/Repositories/SubjectRepository.php:122
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
        • app/Repositories/SubjectRepository.php:121
        • app/Services/SubjectService.php:60
      • SubjectRepository.php#125satt_satt_mobile_app13.77msselect `id`, `name`, `slug`, `parent_id`, `_lft`, `_rgt` from `subjects` where (20231 between `subjects`.`_lft` and `subjects`.`_rgt` and `subjects`.`id` <> 17306) and `subjects`.`deleted_at` is null order by `_lft` asc
        Bindings
        • 0: 20231
        • 1: 17306
        Backtrace
        • app/Repositories/SubjectRepository.php:125
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
        • app/Repositories/SubjectRepository.php:121
        • app/Services/SubjectService.php:60
      • SubjectRepository.php#137satt_satt_mobile_app220μsselect * from `subjects` where `subjects`.`id` = 17306 and `subjects`.`deleted_at` is null limit 1
        Bindings
        • 0: 17306
        Backtrace
        • app/Repositories/SubjectRepository.php:137
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
        • app/Repositories/SubjectRepository.php:136
        • app/Services/SubjectService.php:61
      • SubjectRepository.php#140satt_satt_mobile_app220μsselect `id`, `name`, `parent_id`, `_lft`, `_rgt`, `slug`, `meta_og_title`, `meta_keyword`, `meta_description` from `subjects` where `subjects`.`id` = 17295 and `subjects`.`deleted_at` is null limit 1
        Bindings
        • 0: 17295
        Backtrace
        • app/Repositories/SubjectRepository.php:140
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
        • app/Repositories/SubjectRepository.php:136
        • app/Services/SubjectService.php:61
      • SubjectRepository.php#140satt_satt_mobile_app130μsselect `id`, `description`, `subject_id` from `subject_descriptions` where `subject_descriptions`.`subject_id` in (17295) and `subject_descriptions`.`deleted_at` is null
        Backtrace
        • app/Repositories/SubjectRepository.php:140
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
        • app/Repositories/SubjectRepository.php:136
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        • vendor/kalnoy/nestedset/src/QueryBuilder.php:60
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:235
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:227
        • vendor/kalnoy/nestedset/src/QueryBuilder.php:305
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        • vendor/kalnoy/nestedset/src/QueryBuilder.php:321
        • app/Repositories/SubjectRepository.php:293
        • vendor/laravel/framework/src/Illuminate/Cache/Repository.php:427
        • vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:453
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        • app/Services/SubjectService.php:76
        • app/Http/Controllers/Academy/SubjectController.php:105
        • vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:44
      • SubjectRepository.php#340satt_satt_mobile_app220μsselect `videos`.`video_src_url`, `mediables`.`mediable_id` as `chapter_id` from `videos` inner join `mediables` on `mediables`.`mediable_id` = `videos`.`id` where `videos`.`id` = 0 and `videos`.`video_src` = 'youtube' and `videos`.`deleted_at` is null
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        • app/Repositories/SubjectRepository.php:340
        • app/Services/SubjectService.php:77
        • app/Http/Controllers/Academy/SubjectController.php:105
        • vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:44
      • SubjectService.php#82satt_satt_mobile_app360μsselect `id`, `name`, `main_category_id`, `slug` from `subjects` where `id` <> 17306 and `parent_id` = 17295 and `main_category_id` = 3 and `subjects`.`deleted_at` is null limit 5
        Bindings
        • 0: 17306
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        Backtrace
        • app/Services/SubjectService.php:82
        • app/Http/Controllers/Academy/SubjectController.php:105
        • vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:44
        • vendor/laravel/framework/src/Illuminate/Routing/Route.php:266
      • restrict.blade.php#30satt_satt_mobile_app230μsselect * from `package_plans` where `status` = 'active' and `package_plans`.`deleted_at` is null
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        • vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:124
        • vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
        • vendor/livewire/livewire/src/Mechanisms/ExtendBlade/ExtendedCompilerEngine.php:22
        • vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:75
      App\Models\Subject
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      App\Models\Question
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      App\Models\QuestionOption
      5QuestionOption.php#?
      App\Models\SubjectDescription
      3SubjectDescription.php#?
      App\Models\PackagePlan
      3PackagePlan.php#?
      App\Models\User
      2User.php#?
      App\Models\SubCategory
      1SubCategory.php#?
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