SAP UI5 interview questions

Which Control Libraries Are Used For Ui5 Application Development?
Ans: sap.ui.commons, sap.ui.table and sap.suite.ui libraries for desktop application development and sap.m library along with sap.ui.layout for Fiori application development.

How Navigation Works In Sapui5?
Ans: Sap uses two mechanisms, routing and EventBus. Routing Is specifically used for bookmarking the URL. We define routing in component.js within the metadata. It also defines the navigation path and hash changer which is used at the runtime to change the url of the particular screen.

What Is Component?
Ans: It is the first point of the application, it serves as an index, which encapsulates all the application details, like view names, routing details, main view, applications type(Full Screen or SplitApp), application service configuration etc.

There are 2 types of compponents:

Faceless components: Mainly without UIs, Used for business logic and helper methods e.g. Formatters.
UI Component: typically component.js file which is made by extending sap.ui.core.UI Component class.
What Is Responsive Web Design?
Ans: A web application which gives same look and feel to the user in desktops and mobile devices.

What Is The Syntax To Define A Control In Ui5?
Ans: var obj_name = new sap.m.ControlName(“id of control”,{ properties, events, aggregations });

What Is Formatter In Sapui5 And How To Use It?
Ans: We need to use formatter when we need to perform some changes on the back end property data on the front end.

we can use formatter while data binding to a property like as follows:

oControl = new sap.ui.commons.TextField({
value : {path : “/path”, formatter : function(oEvent){
return “Value:”+oEvent;
}}});

How Many Types Of Views Are Available In Sapui5?
Ans: There are 4 types of views available:

JS view
JSON view
XML view
HTML view
How Many Types Of Data Model Are Available In Sapui5?
Ans: SAPUI5 has following predefined four data models available:

JSON Model:Client-side model, supports two way binding.
XML Model: Client-side model and intended for small data sets this is very rarely used model.