Chapter 10
True/False A logicial address specifies an actual location in main memory.
False
True/False An address in a single contiguous memory management system is made up of a page and an offset.
False
True/False An operating system is an example of application software.
False
True/False Batch processing implies a high level of interaction between the user and the program.
False
True/False CPU scheduling determines which programs are in memory.
False
True/False In a fixed-partition system, main memory is divided into several partitions of the same size.
False
True/False Multiprogramming is the technique of using multiple CPUs to run programs
False
True/False The bounds register contains the last address of a partition.
False
True/False The first-come, first-served scheduling algorithm is probably optimal.
False
Explain the term multiprogramming.
Multiprogramming is the technique of keeping multiple programs in main memory at the same time, each competing for time on the CPU.
The following terms relate to how the operating system manages multiprogramming. Describe the part each plays in this process.
a. Process A process is a program in execution. b. Process management Process management is keeping track of necessary information for active processes. c. Memory management Memory management is keeping track of how and where programs are loaded into main memory. d. CPU scheduling CPU scheduling is determining which process in memory is given access to the CPU so that it may execute.
Distinguish between application software and system software.
Systems software are tools to help others write programs; they manage a computer system and interact with hardware. Application software are programs to solve specific problems.
True/False A computer can have more than one operating system, but only one OS is in control at any given time.
True
True/False A dumb terminal is an I/O device that connects to a mainframe computer.
True
True/False A process in the running state is currently being executed by the CPU.
True
True/False A time slice is the amount of time each process is given before being preempted in a round-robin scheduler.
True
True/False A timesharing system allows multiple users to interact with a computer at the same time
True
True/False An operating system provides a basic user interface that allows the user to use the computer
True
True/False In the 1960s and 1970s, a human operator would organize similar computer jobs into batches to be run
True
True/False The first page in a paged memory system is page 0.
True
True/False The process control block (PCB) is a data structure that stores all information about a process.
True
Distinguish between logical addresses and physical addresses.
A physical address is an actual address in the computer's main memory device. A logical address is an address relative to the program. A logical address is sometimes called a relative address for obvious reasons.
What is a real-time system?
A real-time system is a system in which the speed of an answer is crucial.
What is an operating system?
An operating system is a piece of software that manages a computer's resources and provides an interface for system interaction.
What is response time?
Response time is how long it takes to get an answer. The expression comes from the delay between receiving a stimulus (asking a question) and producing a response (answering the question).
What is the relationship between real-time systems and response time?
Time is critical in many real-time situations, so the response time must be kept to a minimum.
Define timesharing.
Timesharing is a technique by which CPU time is shared among multiple interactive users at the same times.