what is mern stack

What is a thread: Sometimes it is also a lightweight process, which is the smallest unit of program execution flow. A standard thread consists of a thread ID, a current instruction pointer (PC), a collection of registers, and a stack. A process consists of one to multiple

Difference between the two: Action class: ◆ Struts1 requires the Action class to inherit an abstract base class. A common problem with Struts1 is the use of abstract class programming rather than interfaces. ◆ Struts 2 Action class can implement an Action interface or other interfaces to make optional and customized services possible. Struts2 provides an ActionSupport base class to implement common interfaces. The Action interface

Welcome to the Oracle community forum and interact with 2 million technical staff. What is Oracle's policy for Linux? Oracle fully supports the Linux operating system. In fact, Oracle is the first commercial database for Linux. By using Oracle's industry-leading products to support Linux, we can make users in the cheapest Welcome to the Oracle community forum and

What is the difference between a member variable and a local variable?A: The position in the class is differentMember variables: Outside the method in the classLocal variables: In a method definition or on a method declarationB: The location in memory is differentMember variable: in heap memoryLocal variables: in

What is the silence killer of Oracle server virtualization VMware? -- Linux Enterprise Application-Linux server application information. For details, refer to the following section. Although Wall Street and the IT industry are still pushing for VMware, the company has apparently encountered serious challenges. According to the ESG research firm, large enterprises accept Server Virtualization Technologies du

Title Requirements:　　What is the difference between a linked list and an array?Topic Analysis:The array statically allocates memory, and the list dynamically allocates memory;The array is predefined in length, and the linked list is not pre-managed;Arrays are contiguous in memory, and linked lists may be contiguous;Arr

Mmap Basic ConceptsMmap is a memory-mapped file method that maps a file or other object to the address space of a process, implementing a one by one-mapping relationship between the file disk address and a virtual address in the process virtual address space. After such a mapping relationship is implemented, the process can read and write the memory in a pointer way, and the system will automatically write

Objective:I'm studying UNIX programming art recently. The previous rough flip, thought to be introduced UNIX tools. Now seriously looked at the next, originally is the introduction design principle. Its core is the first chapter of the UNIX philosophy and 17 design principles, and the following content is around it to expand. Previously said, to learn the appropr

Arrays are either created in a static store (such as a global array) or created on a stack. Pointers can point to any type of memory block at any time.(1) Changes in the content of the differences Char a[] = "Hello"; They have their own memory space;A[0] = ' X ';Char *p = "World"; Note P points to the constant stringP[0] = ' X '; The compiler cannot find the error, run-time error (2) Use the operator sizeof to calculate the capacity (i

Following features of C + + is not there in Java.No pointersNo sizeof operatorNo Scope resolution operatorLocal variables in functions cannot is staticNo Multiple InheritanceNo Operator OverloadingNo Preprocessor and macrosNo user suggested inline functionsNo GotoNo default ArgumentsNo unsigned int in JavaNo--Operator in JavaNo stack allocated objects in JavaNo d

Springis an open source framework thatSpringis in2003year rise of a lightweightJavadevelopment Framework, byRod Johnsonin his writingsExpert one-on-onej2ee Development and Designinelaboratedpart of the concept and prototype derived from. It is created to address the complexities of enterprise application development. One of the main advantages of the framework is its layered architecture, which allows the u