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单选题 What is the difference between an active object and a passive object
学科：21级重修-软建
时间：2025-05-07 13:36:39
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题目1单选题
What is the difference between an active object and a passive objectA. An active object controls a passive objectB. An active object does not have a thread of control; a passive object has a thread of controlC. An active object executes in a distributed system; a passive object executes in a centralized systemD. An active object has a thread of control; a passive object does not have a thread of control
题目2单选题
What is an event-driven input taskA. A task that executes every few secondsB. A task that controls other tasksC. A task that receives inputs from an external device when it generates interruptsD. A task that checks whether there is new input from an external device
题目3单选题
What is a periodic taskA. A task that responds to each message it receivesB. A task that is activated by a timer eventC. A task that is activated by an external eventD. A task that is activated by an input event
题目4单选题
What is a demand-driven taskA. A task that responds to each message it receivesB. A task that is activated by an internal message or event from another taskC. A task that is activated by an external eventD. A task that is activated by an input event
题目5单选题
What is a control taskA. A task that controls other tasksB. A task that executes a statechartC. A task that executes on demandD. A task that controls I/O devices
题目6单选题
What is a user interaction taskA. A task that interacts with I/O devicesB. A task that interacts with usersC. A task that interacts with a user sequentiallyD. A task that interacts with a user concurrently
题目7单选题
Which of the following is true for a Centralized Control architectural patternA. Control is divided among various control componentsB. It provides the overall control and sequencing of the systemC. It provides overall control by coordinating several control componentsD. It provides overall control over various I/O objects
题目8单选题
Which of the following is true for a Distributed Control architectural patternA. Control is divided among various control componentsB. It responds to multiple requests from client subsystemsC. It provides overall control by coordinating several control componentsD. It provides distributed control over various I/O objects
题目9单选题
Which of the following is true for a Hierarchical Control architectural patternA. Control is divided among various control componentsB. It provides overall control over several client subsystemsC. It provides overall control by coordinating several control componentsD. It provides overall control over various I/O objects
题目10单选题
Which of the following is NOT a case of event synchronizationA. External eventB. Internal eventC. Timer eventD. User event
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