WGU C952 computer architecture Objective Assessment Guide Exam Questions and Already graded Solutions and Assured Satisfactions 2024/2025
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WGU C952 Computer Architecture
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WGU C952 Computer Architecture
WGU C952 computer architecture Objective Assessment Guide Exam Questions and Already graded Solutions and Assured Satisfactions 2024/2025
Flash memory - correct answer a type of non-volatile computer storage medium that retains data even when the power supply is disconnected.
Disk memory - co...
WGU C952 computer architecture Objective Assessment
Guide Exam Questions and Already graded Solutions and
Assured Satisfactions 2024/2025
Flash memory - correct answer a type of non-volatile computer storage medium that
retains data even when the power supply is disconnected.
Disk memory - correct answer a hard disk drive is a non-volatile storage device that
uses rotating disks or platters to store and retrieve data.
Track - correct answer one of thousands of concentric circles that make up the surface
of a magnetic disk.
Sector - correct answer one of the segments that make up a track on a magnetic disk;
a sector is the smallest amount of information that is read or written on a disk.
Seek - correct answer the process of positioning a read/write head over the proper
track on a disk.
Rotational latency - correct answer the time required for the desired sector of a disk to
rotate under the read/write head; usually assumed to be half the rotation time.
Direct mapped cache - correct answer a cache structure in which each memory
location is mapped to exactly one location in the cache.
Tag - correct answer a field in a table used for a memory hierarchy that contains the
address information required to identify whether the associated block in the hierarchy
corresponds to a requested word.
Valid bit - correct answer a field in the tables of a memory hierarchy that indicates that
the associated block in the hierarchy contains valid data.
,Write through - correct answer a scheme in which writes always update both the cache
and the next lower level of the memory hierarchy, ensuring that data are always
consistent between the two.
Write buffer - correct answer a queue that holds data while the data are waiting to be
written to memory.
Write-back - correct answer a scheme that handles writes by updating values only to
the block in the cache, then writing the modified block to the lower level of the hierarchy
when the block is replaced.
Split cache - correct answer a scheme in which a level of the memory hierarchy is
composed of two independent caches that operate in parallel with each other, with one
handling instructions and one handling data.
Amat - correct answer average memory access time: a performance metric used in
computer architecture and system design to evaluate the average time it takes to
access data from a computer's memory system.
Fully associative cache - correct answer a cache structure in which a block can be
placed in any location in the cache.
Set associative cache - correct answer a cache that has a fixed number of locations (at
least two) where each block can be placed.
Lru - correct answer a replacement scheme in which the block replaced is the one that
has been unused for the longest time.
Multilevel cache - correct answer a memory hierarchy with multiple levels of caches,
rather than just a cache and main memory.
,Global miss rate - correct answer the fraction of references that miss in all levels of a
multilevel cache. It is the ratio of cache misses to the total number of cache accesses or
requests made across the entire system.
Local miss rate - correct answer the fraction of references to one level of a cache that
miss; used in multilevel hierarchies. The ratio of cache misses to the total number of
cache accesses or requests made to that cache.
Dependability - correct answer the importance of dependability in computer memory
systems. It highlights that the memory hierarchy should be reliable and not prone to
data loss.
Mttr (mean time to repair) - correct answer mean time to repair: a metric used in
reliability and maintenance analysis to measure the average time it takes to repair a
system or component after it has experienced a failure or malfunction.
Mtbf (mean time between failures) - correct answer a measure of the average time
between failures in a system - the higher the amount, the more reliable the thing is.
Mttf (mean time to failure) - correct answer the average time a device or component is
expected to be in operation.
Annual failure rate - correct answer a reliability metric used to estimate the likelihood
or probability of a system, component, or device experiencing a failure within a one-year
time frame. Afr is an important measure in reliability engineering and is often used to
assess and communicate the reliability of products, systems, and components over
extended periods.
Fault avoidance - correct answer very careful development methods to reduce the
number of faults introduced in the first place
Fault forecasting - correct answer predicting the presence and creation of faults
allowing the component to be replaced before it fails
, Error detection code - correct answer a code that enables the detection of an error in
data, but not the precise location and, hence, correction of the error.
Virtual machine (vm) - correct answer software that simulates the hardware of a
physical computer, creating one or more logical machines within one physical machine.
Virtual machine monitor - correct answer a hypervisor, is a software or hardware
component that manages and controls the execution of vms on a physical host
machine. Its primary role is to create, allocate resources to, and oversee the operation
of multiple vms, each of which behaves like an independent and isolated computer with
its own operating system and applications. The vmm abstracts and virtualizes the host's
hardware resources, enabling multiple vms to share those resources without
interference.
Hypervisor - correct answer software that enables a single computer to run multiple
operating systems simultaneously.
Host machine - correct answer another name for a physical machine or virtual host
Guest vm - correct answer a virtualized computing environment created and managed
by a hypervisor or virtualization software on a host machine. The guest vm is a self-
contained, isolated instance that operates as an independent virtual computer with its
own operating system, applications, and data. These vms share the physical hardware
and resources of the host machine but are kept separate from each other, providing a
secure and isolated environment for running multiple operating systems and workloads
on a single host.
I/o bound - correct answer a situation in which a computer system's overall
performance is limited or constrained by the speed at which it can read from or write to
input and output (i/o) devices, such as hard drives, solid-state drives, network
interfaces, or external storage.
Raid - correct answer a technology used in data storage to enhance data redundancy,
availability, and performance. Raid achieves these objectives by combining multiple
physical hard drives into a single logical unit, allowing for various data storage
techniques.
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