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What is a pointer in C? A pointer is a variable that refers to the address of a value. It makes the code optimized and makes the performance fast. Whenever a variable is declared inside a program, then the system allocates some memory to a variable. The memory contains some address number. The variables that … Read more
Which data structure is used to perform recursion? Stack data structure is used in recursion due to its last in first out nature. Operating system maintains the stack in order to save the iteration variables at each function call Write the syntax in C to create a node in the singly linked list. struct node … Read more
How can someone change the default database type in Laravel? Laravel is configured to use MySQL by default. To change its default database type, edit the file config/database.php: Search for ‘default’ =>env(‘DB_CONNECTION’, ‘mysql’) Change it to whatever required like ‘default’ =>env(‘DB_CONNECTION’, ‘sqlite’) By using it, MySQL changes to SQLite. What do you understand by database migrations … Read more
Explain ORM in Magento. ORM stands for Object Relational Mapping. It is a programming technique used to convert different types of data into objects and vice versa. There are two types of ORM: Converts different types of data into objects. Converts objects to various types of data. How to enable Maintenance mode in Magento? Create … Read more
What is garbage collection The runtime system keeps track of the memory that is allocated and is able to determine whether that memory is still useable. This work is usually done in background by a low-priority thread that is referred to as garbage collector. When the gc finds memory that is no longer accessible from … Read more
What is lazy stored procedure in Swift and when is it used? Lazy stored properties are used for a property whose initial values are not calculated until the first time it is used. A lazy stored property can be declared by writing the lazy modifier before its declaration. Lazy properties are useful when the initial … Read more
What is the difference b/w sample() and subset() in R? The sample() method is used to choose a random sample of size n from a dataset while the subset method is used to choose variables and observations. Explain initialize() function in R? This function is used to initialize the private data members while declaring the … Read more
What is meant by Gesture Responder System? It is an internal system of React Native, which is responsible for managing the lifecycle of gestures in the system. React Native provides several different types of gestures to the users, such as tapping, sliding, swiping, and zooming. The responder system negotiates these touch interactions. Usually, it is … Read more
How to retrieve user name in case of Window Authentication? System.Environment.UserName What is the difference between Hash table and Array list?What is the difference between Hash table and Array list? Hash table stores data in the form of value pair and name while Array list stores only values. You need to pass name to access … Read more
What is caller ? Same as caller principal. What is comment ? In an XML document, text that is ignored unless the parser is specifically told to recognize it. What is “application configuration resource file” ? An XML file used to configure resources for a JavaServer Faces application, to define navigation rules for the application, … Read more