OS Quiz2 Set A

In segmentation, what does each segment represent?

• • A variable size block in memory

• • A fixed size block in memory

• • A page in a page table

• • A list of addresses in a program

FIFO suffers from which of the following issues?

• • Belady’s Anomaly

• • Cache thrashing

• • High access time

• • Inefficient memory fragmentation

Which of the following is true about the Optimal page replacement algorithm?

• • It is always the least efficient algorithm

• • It is rarely used in practice due to the difficulty in predicting future page accesses

• • It is guaranteed to cause the least number of page faults compared to all other algorithms

• • It is easy to implement and doesn’t require any future knowledge

Which of the following is a benefit of containerization in cloud environments?

• • Containers are not portable across different cloud providers

• • Containers can easily be scaled horizontally to handle load changes

• • Containers require manual configuration of resources on physical hardware

• • Containers introduce significant overhead compared to virtual machines

In cloud environments, which consideration is most important for cost efficiency?

• • Fixed resource allocation for each service

• • Auto-scaling based on demand

• • High resource over-provisioning

• • Manual configuration of each instance

Which of the following file systems is primarily used in Windows operating systems?

• • FAT32

• • ext4

• • NTFS

• • HFS+

In a single-level directory structure, how are files organized?

• • Files are stored in a hierarchical tree structure.

• • All files are stored in the same directory with no subdirectories.

• • Files are stored in multiple partitions.

• • Files are distributed across different storage devices.

Which of the following is a primary file allocation method?

• • Linked allocation

• • Clustered allocation

• • Contiguous allocation

• • Directory allocation

In Linux file permissions, which of the following represents read (r), write (w), and execute (x) permissions for a file?

• • rwxr-xr--

• • rw-rw-rw-

• • r-xr--x--

• • rwxrwxr--

Which of the following is a feature of cloud-based file systems like Google Drive or Dropbox?

• • Centralized storage with fixed capacity.

• • The ability to sync files across devices automatically.

• • Limited access from mobile devices.

• • Fixed file permissions that cannot be modified.