Which of the following is a feature of the ext4 file system? MCQ with Answer and Explanation

Which of the following is a feature of the ext4 file system?
A. Case-insensitive filenames
B. File compression built-in
C. Support for extents
D. No journaling
Answer: Option C
Solution (By JKSSB Mock Tests)
ext4 supports extents (contiguous blocks) for better performance; it also has journaling, but not case-insensitivity.

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Practice More Operating Systems Questions

Question #1
In Windows, the 'Device Manager' can be accessed by running which command?
A. hdwwiz.cpl
B. sysdm.cpl
C. devmgmt.msc
D. devmgmt

Correct Answer: Option C


Explanation:
devmgmt.msc opens Device Manager; hdwwiz.cpl also opens the Add Hardware wizard.

This question belongs to: Computer Operating Systems
Question #2
What type of operating system design runs a single application loop directly on hardware without processing delays, frequently used in automotive anti-lock brakes?
A. Batch Processing OS
B. Time-Sharing Framework
C. Real-Time Operating System (RTOS)
D. Network OS Shell

Correct Answer: Option C


Explanation:
An RTOS provides deterministic response timing guarantees necessary for critical automation tasks like braking loops or medical telemetry.

This question belongs to: Computer Operating Systems
Question #3
What is the purpose of the Android 'SharedPreferences'?
A. To cache data temporarily
B. To share data between apps
C. To store primitive data in key-value pairs persistently
D. To store complex objects

Correct Answer: Option C


Explanation:
SharedPreferences is used for storing small amounts of simple data (booleans, strings, ints) for app settings.

This question belongs to: Computer Operating Systems