What is the purpose of the Android 'UsbManager'? MCQ with Answer and Explanation

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What is the purpose of the Android 'UsbManager'?

A. To detect USB devices

B. To manage USB device connections and communication

C. To control USB charging

D. To manage USB storage

Answer: Option B

Solution (By JKSSB Mock Tests)

UsbManager provides access to USB devices connected to the Android device, allowing communication via USB.

This question belongs to: Computer Operating Systems

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In Windows, the Registry is divided into which main hives?

A. HKEY_LOCAL_MACHINE, HKEY_CURRENT_USER, HKEY_CLASSES_ROOT, HKEY_USERS, HKEY_CURRENT_CONFIG

B. HKEY_LOCAL, HKEY_REMOTE, HKEY_DEFAULT

C. HKEY_CONFIG, HKEY_DRIVERS, HKEY_SERVICES

D. HKEY_ROOT, HKEY_USER, HKEY_SYSTEM, HKEY_SOFTWARE

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Correct Answer: Option A

Explanation:
The five root keys (hives) are HKLM, HKCU, HKCR, HKU, and HKCC.

This question belongs to: Computer Operating Systems

Question #2

What type of operating system kernel includes all device drivers, file system handlers, and process management routines inside a single massive binary space running in privileged mode?

A. Microkernel

B. Exokernel

C. Monolithic Kernel

D. Asymmetric Kernel

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Correct Answer: Option C

Explanation:
A monolithic kernel compiles all essential OS services directly into a single, comprehensive space, providing high performance at the expense of modular isolation.

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Question #3

What is the primary role of the 'Android Manifest' file inside an Android application bundle?

A. To declare essential structural information about the app (components, required permissions, and hardware targets) to the OS.

B. To store the graphical application skin structures.

C. To compile application Java code into DEX bytecode files.

D. To act as an internal local relational database.

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Correct Answer: Option A

Explanation:
The AndroidManifest.xml file defines application components, target SDKs, structure mappings, and hardware/security permissions for the Android system.

This question belongs to: Computer Operating Systems

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