D686 EXAM QUESTIONS AND
VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
Why does linked allocation imply lower access speed? - CORRECT ANSWER-Sequential access
requires following pointers, increasing disk seek time.
What is the advantage of clustering in file systems? - CORRECT ANSWER-Reduces File System
Overhead - Instead of tracking each block separately, the file system manages clusters, reducing
bookkeeping.
Improves Read/Write Efficiency - Since files are stored in larger chunks, the disk head moves less
frequently, improving performance.
How does clustering work in file systems? - CORRECT ANSWER-The disk is divided into clusters
(e.g., 4 KB per cluster).
Each file is allocated clusters instead of blocks (even if the file is smaller than a cluster).
The OS tracks clusters in a File Allocation Table (FAT) or index structure (NTFS, EXT4, etc.).
What Is Journaling in File Systems? - CORRECT ANSWER-Journaling is a technique used by
modern file systems to prevent data corruption by keeping a log (journal) of file system changes
before actually writing them to disk. This helps in recovering data in case of a crash, power
failure, or system failure
, File Allocation Table (FAT) - CORRECT ANSWER-The File Allocation Table (FAT) is a table stored on
disk that acts as a map for locating file clusters without physically traversing the disk. Instead of
searching through each block like linked allocation, the OS can simply look up the FAT table to
find the next cluster in a file's chain.
Indexed allocation - CORRECT ANSWER-Index Block: Each file has a separate index block, which
is a table storing pointers to all the blocks containing the actual file data.
What is one potential issue associated with using clusters of blocks in file systems to reduce
space overhead? - CORRECT ANSWER-Increased internal fragmentation due to underutilized
clusters
What is a common reason for using application programming interfaces [APIs] to access cloud
storage instead of existing protocols like network file system [NFS] or common internet file
system [CIFS]? - CORRECT ANSWER-NFS and CIFS are traditional file-sharing protocols designed
for local networks. They can struggle with high latency and network failures over wide-area
networks (WANs), such as cloud-based storage environments.
APIs (like RESTful or SDK-based APIs) used in cloud storage services are optimized for WAN
conditions, handling latency and network disruptions more efficiently than traditional file-
sharing protocols.
victim frame - CORRECT ANSWER-A page that has been selected for replacement when a page
fault occurs -- determined by the page replacement algorithm.
What is frame allocation? - CORRECT ANSWER-Frame allocation refers to the strategy used by
an operating system to distribute physical memory frames among multiple processes in a
system. Since processes require memory pages to execute, the OS must decide how many
frames each process should receive and which frames to replace when memory is full.
(frame allocation) What is equal allocation? - CORRECT ANSWER-Each process gets an equal
share of the available frames.
VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
Why does linked allocation imply lower access speed? - CORRECT ANSWER-Sequential access
requires following pointers, increasing disk seek time.
What is the advantage of clustering in file systems? - CORRECT ANSWER-Reduces File System
Overhead - Instead of tracking each block separately, the file system manages clusters, reducing
bookkeeping.
Improves Read/Write Efficiency - Since files are stored in larger chunks, the disk head moves less
frequently, improving performance.
How does clustering work in file systems? - CORRECT ANSWER-The disk is divided into clusters
(e.g., 4 KB per cluster).
Each file is allocated clusters instead of blocks (even if the file is smaller than a cluster).
The OS tracks clusters in a File Allocation Table (FAT) or index structure (NTFS, EXT4, etc.).
What Is Journaling in File Systems? - CORRECT ANSWER-Journaling is a technique used by
modern file systems to prevent data corruption by keeping a log (journal) of file system changes
before actually writing them to disk. This helps in recovering data in case of a crash, power
failure, or system failure
, File Allocation Table (FAT) - CORRECT ANSWER-The File Allocation Table (FAT) is a table stored on
disk that acts as a map for locating file clusters without physically traversing the disk. Instead of
searching through each block like linked allocation, the OS can simply look up the FAT table to
find the next cluster in a file's chain.
Indexed allocation - CORRECT ANSWER-Index Block: Each file has a separate index block, which
is a table storing pointers to all the blocks containing the actual file data.
What is one potential issue associated with using clusters of blocks in file systems to reduce
space overhead? - CORRECT ANSWER-Increased internal fragmentation due to underutilized
clusters
What is a common reason for using application programming interfaces [APIs] to access cloud
storage instead of existing protocols like network file system [NFS] or common internet file
system [CIFS]? - CORRECT ANSWER-NFS and CIFS are traditional file-sharing protocols designed
for local networks. They can struggle with high latency and network failures over wide-area
networks (WANs), such as cloud-based storage environments.
APIs (like RESTful or SDK-based APIs) used in cloud storage services are optimized for WAN
conditions, handling latency and network disruptions more efficiently than traditional file-
sharing protocols.
victim frame - CORRECT ANSWER-A page that has been selected for replacement when a page
fault occurs -- determined by the page replacement algorithm.
What is frame allocation? - CORRECT ANSWER-Frame allocation refers to the strategy used by
an operating system to distribute physical memory frames among multiple processes in a
system. Since processes require memory pages to execute, the OS must decide how many
frames each process should receive and which frames to replace when memory is full.
(frame allocation) What is equal allocation? - CORRECT ANSWER-Each process gets an equal
share of the available frames.
