TRUE OR FALSE T F 1. At a top level, a computer consists of CPU, memory, and I/O
ID: 3813330 • Letter: T
Question
TRUE OR FALSE
T F 1. At a top level, a computer consists of CPU, memory, and I/O components.
T F 2. The basic function of a computer is to execute programs.
T F 3. Program execution consists of repeating the process of instruction fetch and instruction execution.
T F 4. Interrupts do not improve processing efficiency.
T F 5. An I/O module cannot exchange data directly with the processor.
T F 6. A key characteristic of a bus is that it is not a shared transmission medium.
T F 7. Computer systems contain a number of different buses that
provide pathways between components at various levels of the
computer system hierarchy.
T F 8. In general, the more devices attached to the bus, the greater the bus length and hence the greater the propagation delay.
T F 9. It is not possible to connect I/O controllers directly onto the system bus.
T F 10. The method of using the same lines for multiple purposes is known as time multiplexing.
T F 11. Timing refers to the way in which events are coordinated on the bus.
T F 12. With asynchronous timing the occurrence of events on the bus is
determined by a clock.
T F 13. Because all devices on a synchronous bus are tied to a fixed clock rate, the system cannot take advantage of advances in device performance.
T F 14. The unit of transfer at the link layer is a phitand the unit transfer at the physical layer is a flit.
T F 15. A key requirement for PCIe is high capacity to support the needs of higher data rate I/O devices such as Gigabit Ethernet.
Explanation / Answer
1) It is True since these are the main basic and important components.
2) It is true since a Computer was mainly designed to simplify human tasks. Generally the tasks are given as programs to users. Hence it is true as they have to execute them.
3) It is true since we have to gather instructions and then execute them repeatedly as that improves efficiency.
4) False an Interrupts are needed. This is how the processor efficiency will be enhanced.
5) False since an I/O Module can sometimes or may be always can exchange data directly with the processor.
6) False since bus can carry data from different parts simultaneously.
7) True since Bus is mainly responsible to connect various parts of a Computer.
8) True since as more devices get attached we need to join them through a bus and hence length increases and also the Propogation delay as well.
9) False we can connect I/O Controllers directly as that is how we can connect system directly
10) True since the main purpose of Multiplexing is many lines get joined on a single line to improve efficiency.
11) True since when many devices are connected Timing plays a key role.
12) False since in Asynchronous timing there is no much significance for a clock as the timing will not be uniform. It willbe on demand or request.
13) True as it will give the divided slots uniformly to all the devices connected.
14) False Since the unit of transfer at Link LAyer is Phit whereas The unit of Synchronization is called Flit.
15) True Since We have to enhance the performance to the Maximum Extent Possible.
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