Lecture 7 (hard)

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What is the primary advantage of multithreaded applications?

Enhanced responsiveness and real-time performance on multicore systems

What is a common challenge faced in multithreaded applications?

Difficulty in coordinating actions between threads

What are the two basic rules for writing efficient code mentioned in the text?

Avoid memory allocation and unnecessary work

Which type of images are recommended for optimal performance in mobile applications?

.png images

What is a key recommendation to improve power consumption in mobile applications?

Executing code in bursts and letting the CPU idle when not in use

Which encryption technique in Android allows different files to be encrypted with different keys that can be unlocked independently?

Metadata encryption

What is the primary purpose of full-disk encryption in Android?

Securing data behind a single user credential

Which security mechanism in Android assigns a unique user ID to each application and runs it as that user in a separate process?

Kernel-level Application Sandbox

Android's Security-Enhanced Linux (SELinux) enforces mandatory access control over processes starting from which Android version?

Android 4.3

What is the main characteristic of file-based encryption introduced in Android 7.0?

Different keys can unlock different files independently

Explain the importance of full-disk encryption in mobile applications.

Full-disk encryption ensures that all data stored on the device is protected from unauthorized access in case the device is lost or stolen.

What is the main advantage of file-based encryption in Android 7.0?

File-based encryption allows different files to be encrypted with different keys, providing more granular control over data protection.

How does metadata encryption contribute to overall security in mobile applications?

Metadata encryption protects sensitive information about the data, such as file names and sizes, adding an extra layer of confidentiality.

Discuss the significance of security best practices in mobile application development.

Security best practices help developers mitigate vulnerabilities, reduce risks, and ensure the confidentiality and integrity of user data.

What are some key security tips for optimizing power consumption in mobile applications?

To optimize power consumption, developers should let the chip idle when not in use, avoid continuous polling for information, and move work off the main thread.

Explore the differences between Android Device Monitor and Android Profiler in Android Studio 3.0 and higher. Learn how to use the Android Profiler window to monitor real-time data for CPU, memory, and network activity, as well as perform code execution tracing and inspect network-transmitted files.

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