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Tutor profile: Muhammad Ahmad N.

Inactive
Muhammad Ahmad N.
Tutor for 4 Years, Computer Engineer and Part time Freelancer
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Questions

Subject: Web Development

TutorMe
Question:

What is CORS? How does it work?

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Muhammad Ahmad N.
Answer:

Cross-origin resource sharing (CORS) is a mechanism that allows many resources (e.g., fonts, JavaScript, etc.) on a web page to be requested from another domain outside the domain from which the resource originated. It’s a mechanism supported in HTML5 that manages XMLHttpRequest access to a domain different. CORS adds new HTTP headers that provide access to permitted origin domains. For HTTP methods other than GET (or POST with certain MIME types), the specification mandates that browsers first use an HTTP OPTIONS request header to solicit a list of supported (and available) methods from the server. The actual request can then be submitted. Servers can also notify clients whether “credentials” (including Cookies and HTTP Authentication data) should be sent with requests.

Subject: Computer Networking

TutorMe
Question:

What are the layers of the OSI reference model?

Inactive
Muhammad Ahmad N.
Answer:

There are 7 OSI layers: Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation Layer and Application Layer.

Subject: Android Programming

TutorMe
Question:

There are four Java classes related to the use of sensors on the Android platform. List them and explain the purpose of each.

Inactive
Muhammad Ahmad N.
Answer:

he four Java classes related to the use of sensors on the Android platform areL Sensor: Provides methods to identify which capabilities are available for a specific sensor. SensorManager: Provides methods for registering sensor event listeners and calibrating sensors. SensorEvent: Provides raw sensor data, including information regarding accuracy. SensorEventListener: Interface that defines callback methods that will receive sensor event notifications.

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