Term
| From the user's point of view, which of the following is the OS mostly designed? |
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Definition
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Term
| From the computer's point of view, which of the following is the OS designed? |
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Definition
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Term
| In the single processor system there is only one general purpose, what are the other processors used for? |
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Definition
other processors must be special purpose
(keyboard, mouse) |
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Term
| Which of the follow is an advantage of a multi-processor system? |
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Definition
Increased throughput
economy of scale
increased reliability |
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Term
| Which of the following are types of multi-processor system? |
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Definition
Asymmetric multiprocessing
Symmetric multiprocessing |
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Term
| What is the goal of multiprogramming? |
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Definition
| to keep the CPU working by organizing code and data so the CPU always has something to execute |
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Term
| Why does the CPU switch between multiple jobs in a Time Sharing OS? |
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Definition
| the CPU switches frequently between multiple jobs so that users can interact with each program while it is running |
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Term
| Why does a Time Sharing OS use CPU scheduling and multiprogramming? |
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Definition
| to provide each user a small portion of the system simultaneously. |
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Term
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Definition
| A program loaded into memory and executing |
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Term
| If several jobs are ready to be brought into memory and there is not enough memory for all of them, what is used? |
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Definition
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Term
| What does Virtual memory allow? |
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Definition
| a job to run while not completely in memory and to run programs that are larger than physical memory. |
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Term
| Modern OS's are ________ driven? |
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Definition
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Term
| Which two operating modes are, at the very least, required to ensure proper executing of the OS? |
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Definition
user mode
kernel mode
(supervisor, system, privileged)
mode bit indicates which mode it is in.
kernel(0) user (1) |
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Term
| When a process executes a system call, what mode is the system in? |
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Definition
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Term
| What can we use to prevent a user program from returning control to the OS? |
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Definition
| When stuck in an infinite loop, or failing to call system services. We can fix this by using a timer – set to interrupt the computer after a specified period |
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Term
| Which of the following does a process need? |
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Definition
| CPU time, memory, files, and I/O devices |
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Term
| Which of the following activities is the OS NOT responsible for in connection to memory management? |
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Definition
| Keeping track of which parts of memory are currently being used and by whom
Deciding which processes (or parts thereof) and data to move into and out of memory
Allocating and de-allocating memory space as needed |
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Term
| Which of the following operating system services is helpful for ensuring efficient operation of the system? |
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Definition
Resource allocation
Accounting
Protection and security
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Term
| Which of the following operating system services is helpful for the user? |
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Definition
User Interface
Program execution
I/O operations
File-system manipulation
Communications
Error Detection |
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Term
| What fundamental approaches to user interfaces are used with OS’s? |
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Definition
| Command-line interface (MS_DOS) GUI (graphical user interface) |
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Term
| Which of these is one of the major categories of system calls? |
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Definition
Process Control
File Manipulation
Device Manipulation
Information Maintenance
Communications
Protection |
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Term
| Which of these is process control related? |
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Definition
end, abort
load, execute
create process, terminate process
get process attributes, set process atrributes
wait for time
wait event, signal event
allocate and free memory |
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Term
| Which of these is file management related? |
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Definition
create/delete file
open, close
read, write, reposition
get/set file attributes |
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Term
| Which of these is device management related? |
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Definition
request/release device
read, write, reposition
get/set device attributes
attach/detach devices |
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Term
| Which of these is information maintenance related? |
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Definition
get/set time or date
get/set system data
get/set process, file, or device attributes |
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Term
| Which of these is communication related? |
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Definition
Create/delete connection
send/recieve messages
transfer info
attach/detach remote devices |
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