Chapter 2 - Computer System Components

Which of the following is NOT a function of the CPU?

Rendering graphics simultaneously across many cores

Internet of Things (IoT) devices are best described as:

 

Smart lightbulbs, doorbells, and thermostats connected to the Internet

Using the formula: Image file size = XY(B/8), what does the variable 'B' represent?

 

The bit depth of the image

Which of the following best describes an operating system?

 

Software that controls the computer hardware and acts as a bridge between applications and the hardware

A bus in a computer system refers to:

 

A series of connections, controllers, and chips that form the computer's information highway

Which of the following best describes how a GPU differs from a CPU?

 

The GPU contains many cores that work in parallel, while the CPU is designed for sequential processing

VGA is best classified as:

 

A legacy analog video interface

USB-C differs from older USB standards primarily because it:

 

Transmits digital video, audio, data, and power through a single connector

Which of the following computer types is described as extremely portable and relies primarily on touchscreen input?

 

Tablet

Which of the following is a modern medical imaging use for a GPU?

 

Image reconstruction and 3D volume rendering

Which of the following best describes a solid-state drive (SSD)?

 

Has no moving parts and uses flash memory to store data

Which monitor type generates its own light at each pixel rather than relying on a backlight, allowing for true blacks?

 

OLED

Which of the following is an example of an input device?

 

Mouse

Which of the following peripheral devices is bidirectional (both input and output)?

 

Touchscreen display

Which type of hard disk is typically the slowest component in a computer because it has both electrical and mechanical components?

 

Spinning disk hard drive

Which of the following correctly identifies a security concern specific to cloud-based storage?

 

Data stored in the cloud is always connected to the internet, making HIPAA compliance and encryption essential

The Image Manager contains:

 

The imaging database including metadata and image pointers

A parity disk in a RAID system stores:

 

Calculated values based on data across all other disks, allowing reconstruction if one disk fails

What does RAID stand for?

 

Redundant Array of Independent Disks

In medical imaging, metadata is stored in the:

 

DICOM image header

When a clinician requests a study, what does the Image Manager do?

 

Looks up the study then uses the pointer to find and retrieve the images from the Image Server

Network-Attached Storage (NAS) differs from DAS primarily because:

 

NAS is a stand-alone RAID array server attached to the network, accessible by multiple devices

Why do imaging departments have exceptionally large data storage needs?

 

A single diagnostic x-ray image can be 18 MB, and exams such as CT abdomen/pelvis can reach 500 MB to 1 GB

RAID 0 uses striping without mirroring. What is the primary benefit and primary risk of this configuration?

 

Benefit: increased retrieval speed; Risk: no redundancy — a single disk failure results in data loss

In RAID 1, data is mirrored across two disks. What happens if one disk fails?

 

No data is lost because a complete copy exists on the other disk

Which of the following is a significant disadvantage of magnetic tape as a storage medium?

 

It has very slow sequential access, taking several minutes to retrieve data

The Image Server is best described as:

 

The physical storage device that holds the actual image pixel data for every study

Magneto-optical disks (MODs) are read using:

 

A laser

Cloud-based storage can be thought of as:

 

A SAN that is off-site and accessed over the internet rather than a local network

In a tiered storage system, which of the following correctly matches tiers with the most likely storage technology used?

 

Short-term: RAID SSD; Long-term: cloud storage or magnetic tape