I/O Wait Loop and Asynchronous Operations Quiz

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What is the primary function of a device driver?

Facilitate communication between the device controller and kernel (correct)

Execute system calls

Store data in the main memory

Perform arithmetic calculations

How many bits make up a byte?

12 bits

4 bits

16 bits

8 bits (correct)

What is the main advantage of Direct Memory Access (DMA) in I/O operations?

It enables high-speed data transfers close to memory speeds (correct)

It allows multiple interrupts per byte

It limits the amount of data transferred per block

It requires CPU intervention for data transfer

What is the role of the CPU in an I/O operation involving DMA?

Relinquish control of the system bus and continue processing Signup and view all the answers

When does the device controller interrupt the CPU during DMA data transfer?

When it finishes transferring a block of data Signup and view all the answers

Which unit of data storage is considered as the native unit?

Word Signup and view all the answers

What is the main characteristic of Random Access Memory (RAM)?

Volatile Signup and view all the answers

Which type of memory is typically in the form of Dynamic Random-Access Memory (DRAM)?

Random Access Memory (RAM) Signup and view all the answers

What is the main characteristic of Read-only memory (ROM)?

Nonvolatile Signup and view all the answers

Which of the following is a mechanical secondary storage device?

Hard-disk drive (HDD) Signup and view all the answers

What type of memory can only be accessed directly by the CPU and has limited capacity?

Read-only memory (ROM) Signup and view all the answers

Which storage system has high speed, small size, and limited capacity?

Random Access Memory (RAM) Signup and view all the answers

What is the purpose of caching in a computer system?

To store information temporarily for fast access Signup and view all the answers

In a cache, where is information temporarily stored?

Fast storage Signup and view all the answers

Which type of environments must provide cache coherency to ensure all CPUs have the most recent value?

Multiprocessor environments Signup and view all the answers

What does job scheduling in an operating system entail?

Choosing which job to run next to minimize CPU utilization Signup and view all the answers

What is an important design problem in cache management?

Determining the most suitable cache size Signup and view all the answers

What is the benefit of spooling in multiprogramming (Batch System)?

To allow a subset of jobs to load into memory simultaneously Signup and view all the answers