PRE TEST_OS_MIDTERMS

What is a fundamental element of CPU utilization?

• Process

• Thread

• Program

• Task

Which of the following is NOT an attribute of a thread?

• Thread execution state

• Base priority

• Process ID

• Execution stack

In which operating system can a process define a specific address space with multiple threads?

• MS-DOS

• Windows

• Java runtime environment

• Classic UNIX

What is the main function of thread synchronization?

• To increase CPU speed

• To prevent interference between threads

• To manage memory allocation

• To enhance user interface

Which thread operation occurs when a thread needs to wait for an event?

• Spawn

• Block

• Unblocked

• Finish

What is a unique identifier for a thread called?

• Process ID

• Thread ID

• Session ID

• User ID

Which of the following is an advantage of user-level threads?

• They require kernel mode for switching

• They can be scheduled by the kernel

• They can run on any OS without kernel changes

• They cannot switch context efficiently

What does a thread's context contain?

• Only the thread ID

• Processor register values and volatile data

• Static storage only

• Only memory allocation information

In a combined approach to thread management, what happens to multiple user-level threads?

• They are managed entirely by the kernel

• They are mapped onto specific kernel-level threads

• They cannot run simultaneously

• They use individual memory spaces

Which state indicates that a thread is ready to execute but not currently running?

• Blocked

• Running

• Suspended

• Ready