Computer System Security and Resource Management

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What is the primary purpose of accounting in a computer system?

To keep track of user resource usage (correct)
To ensure the system is protected from external threats
To manage concurrent processes
To control access to system resources

What is the main function of the protection and security features in a computer system?

To prevent concurrent processes from interfering with each other (correct)
To allow users to access any information they want
To provide a user-friendly interface for managing the system
To ensure all users have equal access to system resources

Which of the following is NOT a key aspect of system security?

User authentication
Implementing precautions throughout the entire system
Controlling access to external I/O devices
Allowing unrestricted access to system resources (correct)

What is the primary function of a Command-Line Interface (CLI) in an operating system?

To allow the user to directly enter and execute commands (A) Signup and view all the answers

What is the relationship between the CLI and the operating system kernel?

The CLI can be implemented either within the kernel or as a separate system program (B) Signup and view all the answers

Which scheduling criteria focuses on the amount of time it takes to execute a particular process?

Turnaround time (B) Signup and view all the answers

What is the main focus of CPU utilization in scheduling criteria?

Keeping the CPU as busy as possible (C) Signup and view all the answers

Which scheduling algorithm is not preemptive?

First-Come, First-Served (FCFS) Scheduling (A) Signup and view all the answers

In scheduling, what does throughput measure?

<h1>of processes that complete execution per time unit (D)</h1> Signup and view all the answers

What is the main focus of optimization criteria in scheduling algorithms?

Maximizing CPU utilization (D) Signup and view all the answers

Which scheduling criterion is defined as the amount of time a process has been waiting in the ready queue?

Waiting time (A) Signup and view all the answers

What is a thread?

A lightweight unit of execution within a process (A) Signup and view all the answers

Which of the following resources are shared among threads within the same process?

Code section, data section, and open files (A) Signup and view all the answers

What is the primary advantage of using multithreaded processes?

Ability to perform multiple tasks concurrently (D) Signup and view all the answers

In a web browser, which task might be handled by a separate thread?

Both displaying content and retrieving data (C) Signup and view all the answers

When does the CPU scheduler make decisions about which process to allocate the CPU to?

All of the above (D) Signup and view all the answers

In a word processor, which task might be handled by a separate thread?

All of the above (D) Signup and view all the answers

What is the user interface that represents files, programs, and actions using icons and allows user interaction with mouse and keyboard?

Graphical User Interface (GUI) (C) Signup and view all the answers

Which of the following is NOT a part of a process?

Registers (C) Signup and view all the answers

Which operating system combines a UNIX kernel with a GUI interface called Aqua?

Mac OS X (B) Signup and view all the answers

What is the advantage of having both CLI and GUI interfaces in an operating system?

It allows users to choose the interface based on their preference and task requirements. (B) Signup and view all the answers

Which of the following statements about the process concept is correct?

A process execution must progress in a sequential fashion. (B) Signup and view all the answers

Which of the following operating systems provides a CLI with optional GUI interfaces like Java Desktop and KDE?

Solaris (A) Signup and view all the answers

What is the main purpose of the long-term scheduler (or job scheduler)?

To select which processes should be brought into the ready queue (A) Signup and view all the answers

Which of the following is NOT a process state mentioned in the text?

paused (A) Signup and view all the answers

What is the main purpose of a context switch?

To save the state of the old process and load the saved state for the new process (A) Signup and view all the answers

What is the main purpose of the short-term scheduler (or CPU scheduler)?

To select which process should be executed next and allocate the CPU (D) Signup and view all the answers

What is the main purpose of a thread?

A thread is a basic unit of CPU utilization (D) Signup and view all the answers