吉林大学计算机导论复习重点Word格式文档下载.doc

1、1. How is computer science defined in this book?A：Issues related to the computer.2. What model is the basis for todays computers? （ Knowledge point 1.2）The von Neumann model.3. Why shouldnt you call a computer a data processor? （ Knowledge point 1.1）Computer is general-purpose machine. it can do man

2、y different types of tasks.4. What does a programmable data processor require to produce output data?The input data and the program.5. What are the subsystems of the von Neumann computer model?Memory, arithmetic logic unit, control unit, and input/output.6. What is the function of the memory subsyst

3、em in von Neumanns model?Memory is the storage area. It is where programs and data are stored during processing.7. What is the function of the ALU subsystem in von Neumanns model?ALU is where calculation and logical operations take place.8. What is the function of the control unit subsystem in von N

4、eumanns model?It controls the operations of the memory, ALU, and the input/output subsystem.9. What is the function of the input/output subsystem in von Neumanns model?The input subsystem accepts input data and the program from outside the computer; the output subsystem sends the result of processin

5、g to the outside.10. Compare and contrast the memory contents of early computers with the memory contents of a computer based on the von Neumann model?Computer based on the von Neumann model stores both the program and its corresponding data in the memory. Early computers only stored the data in the

6、 memory.11. How did the von Neumann model change the concept of programming?A program in the von Neumann model is made of a finite number of instructions. The instructions are executed one after another.12. The first electronic special-purpose computer was called c （ Knowledge point 1.4）a. Pascal b.

7、 Pascaline c. ABC d. EDVAC13. One of the first computers based on the von Neumann model was called d （ Knowledge point 1.4）14. The first computing machine to use the idea of storage and programming was called d （ Knowledge point 1.4）a. the Madeline b. EDVAC c. the Babbage machine d. the Jacquard loo

8、m15. d separated the programming task from the computer operation tasks. （ Knowledge point 1.3）a. Algorithms b. Data processors c. High-level programming languages d. Operating systems30. According to the von Neumann model, can the hard disk of today be used as input or output? Explain. （ Knowledge

9、point 1.2）Yes. When the hard disk stores data that results from processing, it is considered an output device; when you read data from the hard disk, it is considered an input device.32. Which is more expensive today, hardware or software? （ Knowledge point 1.3）Software.Chapter 2 Data Representation

10、2.1 Data Types.2.2 Data inside the Computer.2.3 Representing Data.2.4 Hexadecimal and Octal notation.1. Name five types of data that a computer can process. （ Knowledge point 2.1）Numbers, text, images, audio, and video.2. How does a computer deal with all the data types it must process? （ Knowledge

11、point 2.2）All data types are transformed into bit pattern.3.4. What is the difference between ASCII and extended ASCII? （ Knowledge point 2.3）ASCII is a bit pattern made of 7 bits and extended ASCII is a bit pattern made of 8 bits.5. What is EBCDIC?Extended Binary Coded Decimal Interchange Code.6. H

12、ow is bit pattern length related to the number of symbols the bit pattern can represent?The relationship is logarithmic.7.8.9. What steps are needed to convert audio data to bit patterns?Sampling, Quantization, and Coding.10. What is the relationship between image data and video data?Video is a repr

13、esentation of images in time.34. A company has decided to assign a unique bit pattern to each employee. If the company has 900 employees, what is the minimum number of bits needed to create this system of representation? How many patterns are unassigned? If the company hires another 300 employees, should it increase the number of bits? Explain your answer. （ Knowledge point 2.3）log290010, 210-900=124, Yes, 900+300210Chapter 3 Number Representation3.1 Convert a number from decimal, hexadecimal, and octal to binary notation and vice versa.3.2 Integer repres