Technologies are used in AJAX
Name the technologies that are used in AJAX?
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AJAX uses four technologies that are as follows:
1. Extensible HTML (XHTML) and Cascading Style Sheets (CSS)
2. XMLHttpRequest
3. Document Object Model (DOM)
4. JavaScript
Specify the usage of the “grep” command?
Inheritance: It is a feature of object-oriented programming languages in which a sub-type inherits methods and variables from its super-type. The Inheritance is most generally employed as a synonym for class inheritance {class!inheritance}, however in
Semantic error: It is an error in the meaning of program. A statement might contain no syntax errors, however might still break the rules of Java language. For example, when ivar is an int variable, the shown statement is syntactically correct
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Cast: Where Java does not allow the utilization of a source value of one type, it is essential to use a cast to force the compiler to admit the use for the target type. The care must be taken with casting values of primitive types, as this frequently
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Explain Downcast with example: It is a cast towards an object's dynamic kind - that is, `down' the inheritance hierarchy. For illustration: // Downcast from Object to String
Uniform Resource Locator: It is a Uniform Resource Locator (abbreviated as URL) expands the concept of file access from a wholly local context to one in which the resources are named uniformly, irrespective of where they may be physically situated. A
Mention the different states of the XMLHttpRequest an dalso describe their functions.
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