HOTSPOT
You are developing a single-page application (SPA).
You plan to access user data from Microsoft Graph by using an AJAX call.
You need to obtain an access token by the Microsoft Authentication Library (MSAL). The solution must minimize authentication prompts.
How should you complete the code segment? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.
Answer: 
Explanation:
Box 1: loginPopup
Box 2: acquireTokenSilent
The pattern for acquiring tokens for APIs with MSAL.js is to first attempt a silent token request by using the acquireTokenSilent method. When this method is called, the library first checks the cache in browser storage to see if a valid token exists and returns it. When no valid token is in the cache, it sends a silent token request to Azure Active Directory (Azure AD) from a hidden iframe. This method also allows the library to renew tokens.
Box 3: acquireTokenPopup
//AcquireToken Failure, send an interactive request.
Example:
userAgentApplication.loginPopup(applicationConfig.graphScopes).then(function (idToken) {
//Login Success
userAgentApplication.acquireTokenSilent(applicationConfig.graphScopes).then(function (accessToken) {
//AcquireToken Success
updateUI();
}, function (error) {
//AcquireToken Failure, send an interactive request.
userAgentApplication.acquireTokenPopup(applicationConfig.graphScopes).then(function (accessToken) {
updateUI();
}, function (error) {
console.log(error);
});
})
}, function (error) {
console.log(error);
});
Reference: https://github.com/AzureAD/microsoft-authentication-library-for-js/issues/339