A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_URI::$config is deprecated
Filename: core/URI.php
Line Number: 101
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Router::$uri is deprecated
Filename: core/Router.php
Line Number: 127
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$benchmark is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$hooks is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$config is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$log is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$utf8 is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$uri is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$exceptions is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$router is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$output is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$security is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$input is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$lang is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$db is deprecated
Filename: core/Loader.php
Line Number: 396
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_DB_mysqli_driver::$failover is deprecated
Filename: database/DB_driver.php
Line Number: 371
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: Trying to access array offset on true
Filename: libraries/Email.php
Line Number: 978
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$email is deprecated
Filename: core/Loader.php
Line Number: 1283
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::close() should either be compatible with SessionHandlerInterface::close(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 295
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::read($session_id) should either be compatible with SessionHandlerInterface::read(string $id): string|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 169
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::write($session_id, $session_data) should either be compatible with SessionHandlerInterface::write(string $id, string $data): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 238
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 318
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 359
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 282
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 289
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 304
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 314
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 315
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 316
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 317
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 375
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: session_set_save_handler(): Session save handler cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 110
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: session_start(): Session cannot be started after headers have already been sent
Filename: Session/Session.php
Line Number: 143
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$session is deprecated
Filename: core/Loader.php
Line Number: 1283
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Iqs::$user_model is deprecated
Filename: core/Loader.php
Line Number: 358
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$load is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$benchmark is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$hooks is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$config is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$log is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$utf8 is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$uri is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$exceptions is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$router is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$output is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$security is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$input is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$lang is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$db is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$email is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$session is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$user_model is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Iqs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
IQ: What is garbage collection and explain its different generations? | SKML Home Tuitions
Answers (2)
Answer: Garbage Collection is process of reclaiming the runtime unused memory automatically. In other words, it is a way to destroy the unused objects.
A generational garbage collector collects the short-lived objects more frequently than the longer lived ones. Short-lived objects are stored in the first generation, generation 0. The longer-lived objects are pushed into the higher generations, 1 or 2.
Answer: Garbage collector is a part of Common Language Runtime, which does automatic memory management for your application. When you create an object in your application, CLR allocates the memory for that object on Managed Heap.
Garbage collector gives number of benefits like -
Automatic Memory Management - You can build your application without thinking about how to free the memory as Garbage Collector gets called automatically by CLR.
Garbage Collector does proficient memory management for your objects.
Garbage Collector does automatic reclaim of the memory for those objects which are not in use and which are marked for deletion.
Garbage collector allocates the memory for objects in such a way that one object will not be able to use other object data accidently.
The Managed Heap is a memory area where a series of managed objects are stored and managed. As shown in the above diagram, the managed heap gets divided into three different sections which are known as Generations.
Generation 0 - This is the first generation under managed heap which is used to store and manage short-lived objects. All small size objects usually get allocated on Generation 0. When garbage collector reclaims the memory, it always reclaims the memory from generation 0 by default. The objects which are survived in Generation 0 will be pushed towards the generation 1.
Generation 1 - This generation again contain the short-lived objects and the objects which are survived from Generation 0. The objects which are survived in Generation 1 will be pushed towards the generation 2.
Generation 2 - This generation contains the long lived objects which are survived from multiple generations and are used till the process is running.
Garbage Collector first looks for the free memory in generation 0 which can be used to allocate the memory for the new object. The objects are always created in contagious memory. If the garbage collector finds sufficient memory for the new object, it does not search for the dead object and hence memory allocation process is always faster. But in case, sufficient memory is not available; then garbage collector reclaims the memory of the objects which are dead or not getting used for a long time.
When Garbage collector gets executed, it first of all, finds all the live objects. After this garbage collector updates the addresses of objects which will be compacted. Then it reclaims the memory of all the dead objects. Once the memory is reclaimed, it moves the lived objects to the next Generation. For example, the objects which live through in Generation 0 will be moved towards Generation 1. The objects which survived in generation 1 will be moved towards Generation 2. The objects which survived in Generation 2 will stay in Generation 2 only.
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