OS

A ____________ is a dispatchable unit of work that executes sequentially and is interruptible so that the processor can turn to another thread

• port

• token

• process

• thread

We can characterize the behavior of an individual process by listing the sequence of instructions, referred to as a __________, that executes for that process.

• state
• trace
• process block
• priority

The process control block is

• process type variable
• data structure
• A secondry storge section
• A block in memory

Resons for process termination

• normal completion , memory unavailable
• Invalid instruction
• data misuse
• All of the above

The process was placed in a suspended state by an agent.

• process itself
• a parent process
• OS
• All of the above

the entry of all the pcbs of the current processes in the system is in

• Memory Table
• Process image
• Process Table
• Process Unit

process spawning

• is an automatic procedure of de-allocating the process memory
• happens when the OS creats a process at the explicit requist of another process
• happens in the user mode
• non of the above

the state of a process after it encounters and I/O instruction is

• Ready
• Blocked/Waiting
• Running
• Both a and b

The traditional approach of a single thread of execution per process, in which the concept of a thread is not recognized, is known as ____________

• task
• resource
• single-threaded approach
• lightweight process

The idea of having a many-to-many relationship between threads and processes has been explored in the experimental operating system _________ .

• VISTA
• TRIX
• SOLARIS
• LEOPARD