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3. Angular JS - AJAX- $Http - Interview questions

Angular JS - AJAX- $Http - Interview questions

AJAX is a JavaScript method that enables asynchronous communication between the database and the server. Angular uses AJAX technology to build single-page applications.

AngularJS provides $http control which works as a service to read data from the server. The server makes a database call to get the desired records.

We have few questions on Angular JS Ajax for Interview preparation as follows.

Q. 1 Define Ajax in Angular JS .

AngularJS provides $http control which works as a service to read data from the server. The server makes a database call to get the desired records. AngularJS needs data in JSON format.

Q. 2 Write down http service methods .

http service methods are as follows :

• .delete()
• .get()
• .head()
• .jsonp()
• .patch()
• .post()
• .put()

Q. 3 How can someone make an ajax call using AngularJS?

AngularJS contains $https: control, which works as a service to make ajax call to read data from the server. The server creates a database call to retrieve the desired records. AngularJS requires data in JSON format. Once the data gets ready, $https: can be used to retrieve the data from the server in the following manner.
function studentController($scope,$https:) {
var url = ""data.txt"";
$https:.get(url).success( function(response) {
$scope.students = response;
});
}

Q. 4 Write a properties of a Ajax .

Properties are as follows :

• .config the object used to generate the request.
• .data a string, or an object, carrying the response from the server.
• .headers a function to use to get header information.
• .status a number defining the HTTP status.
• .statusText a string defining the HTTP status.