30 Questions
What is the purpose of a variable timer in an operating system?
To allow interrupts at different intervals.
How does an operating system handle interrupts from the timer?
By transferring control to the operating system.
Why are instructions that modify the timer considered privileged?
To prevent unauthorized changes to the timer.
What role does an operating system play in managing resources?
Acts as a resource manager.
Name two types of operating systems mentioned in the text.
Batch Operating System and Time-Sharing Operating Systems.
What is the main characteristic of a Batch Operating System?
It does not interact with the computer directly.
What are the two separate modes of operation commonly found in most computer systems?
User mode and kernel mode
What is the purpose of the mode bit added to the hardware of the computer?
To indicate the current mode: kernel (0) or user (1)
How can we guarantee that a user does not explicitly set the mode bit to 'kernel'?
System call changes mode to kernel, return from call resets it to user
What is the significance of the dual mode of operation in computer systems?
It provides means for protecting the operating system from errant users and errant users from one another
What is another term for kernel mode besides 'kernel mode'?
Supervisor mode, system mode, or privileged mode
Why is it essential to have hardware support for distinguishing among various modes of execution?
To differentiate between user code and operating-system code execution
What is the main responsibility of the operator in a batch operating system?
Sort jobs with similar needs into batches
Name one advantage of a batch operating system related to job completion time.
Processors know how long the job will take when it is in the queue
What is the main advantage of a time-sharing operating system in terms of CPU usage?
CPU idle time can be reduced
What is the term used to describe the time interval given to each task to execute in a time-sharing operating system?
Quantum
Name one disadvantage of a batch operating system related to operator knowledge.
Computer operators should be well known with batch systems
What is a common example of a batch based operating system mentioned in the text?
Payroll System
What are some disadvantages of Distributed Operating Systems?
Failure of the main network will stop the entire communication, Language used for establishing distributed systems is not well defined yet, Expensive and complex software
Give an example of a Distributed Operating System.
LOCUS
What are the advantages of Network Operating Systems?
Highly stable centralized servers, Security concerns handled through servers, Easy integration of new technologies and hardware upgrades
What are some functions provided by Network Operating Systems?
Manage data, users, groups, security, applications, shared access of files, printers, etc.
Why are Network Operating Systems known as tightly coupled systems?
Users are well aware of other users' configurations and connections within the network
What is a key advantage of Network Operating Systems in terms of hardware and technology?
Easy integration of new technologies and hardware upgrades
Which type of operating system serves real-time systems with very strict time requirements?
Real-time Operating Systems
What are the two types of Real-Time Operating Systems mentioned in the text?
Hard Real-Time Systems and Soft Real-Time Systems
Name one example of a Hard Real-Time System application mentioned in the text.
Automatic parachutes or airbags
What is the main advantage of Real-Time Operating Systems mentioned in the text?
Error Free
What is one disadvantage of Real-Time Operating Systems according to the text?
Use heavy system resources
In which type of Operating Systems is virtual memory rarely found according to the text?
Hard Real-Time Systems
This quiz covers key considerations in the design of operating systems such as memory-storage limitations, dual mode and multimode operation, and ensuring proper execution of programs to prevent errors. Test your knowledge on these essential concepts!
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
