OS Quiz2 Set B

What is the main advantage of using segmentation over paging?

• • It reduces fragmentation.

• • It allows for a more efficient use of memory.

• • It maintains the logical division of programs.

• • It improves CPU performance.

Which of the following is a potential drawback of the FIFO page replacement algorithm?

• • It is difficult to implement.

• • It can cause a phenomenon known as Belady’s Anomaly.

• • It provides the optimal page replacement performance.

• • It requires significant processing power to execute.

Which of the following strategies helps in improving memory efficiency in cloud environments?

• • Use of Elastic Load Balancers to distribute memory usage.

• • Horizontal scaling (adding more instances) to balance memory usage.

• • Use of Containers and microservices for better isolation and optimization.

• • Both B and C.

Which of the following is the primary reason that segmentation suffers from external fragmentation?

• • The segment table doesn’t map virtual addresses to physical addresses.

• • Pages are not stored contiguously.

• • Segments are of different sizes and cannot fit together in memory efficiently.

• • Segment tables are inefficient.

In terms of page replacement efficiency, which of the following is true about LRU compared to FIFO?

• • LRU always performs better than FIFO in all cases.

• • LRU can be more costly to implement due to the need for tracking the order of access.

• • LRU requires significantly less memory overhead compared to FIFO.

• • LRU can suffer from higher page fault rates than FIFO in certain workloads.

What is one advantage of using the NTFS file system over FAT?

• • NTFS is simpler and faster for smaller files.

• • NTFS supports larger file sizes and better security.

• • NTFS requires less disk space for file allocation.

• • NTFS is more compatible with older hardware.

Which of the following operations would typically be performed after the open() operation in a file system?

• • close()

• • write()

• • rename()

• • delete()

In which directory structure would you typically find subdirectories and files organized in a tree-like structure?

• • Single-level directory.

• • Two-level directory.

• • Hierarchical directory.

• • Database directory.

In the context of file systems, what does the term "block" refer to?

• • A unit of data that the operating system uses to store files on disk.

• • A section of the hard drive that is always unused.

• • The highest-level directory in a file system.

• • The smallest unit of storage that a file system can allocate.

In a cloud storage system, what does "data redundancy" refer to?

• • Compressing data to reduce storage requirements.

• • Storing multiple copies of data across different servers or locations for reliability.

• • Storing data on a single disk to improve performance.

• • Encrypting data to ensure security.