1. The USB flash drive (USB flash drive) widely used at present belongs to _ _ _ _ _ storage technology.
A. burn B. move C. network D. direct connection answer: B.
2. In order to ensure the quality of computer communication, the bit error rate of related communication equipment is _ _ _ _ _ _.
A. it has nothing to do with data transmission quality. B. it can be any value. C. can be less than a certain value. D. must be 0.
Answer: C (probability of making mistakes in communication)
3. The basic unit of analog channel bandwidth is _ _ _ _.
A.bpm B. bps C. Hz D. ppm Answer: C.
* bandwidth in analog signal is also called bandwidth, and the unit is hertz (Hz); Bandwidth in digital signals refers to the amount of data that a link can pass in a unit time, in bps.
4. Decimal number 153 converted into binary number is _ _ _ _ _.
a . 10 1 10 10b . 10 10000 1c . 10000 1 10d。
5. The information that the CPU can directly access in the computer is stored in _ _ _ _ _ _.
A. floppy disk B. hard disk C. CD D. memory answer: D.
6. Belong to the wired transmission medium is _ _ _ _ _.
A. twisted pair B. microwave line C. satellite line D. infrared transmission answer: A (others are wireless transmission media)
7. The process of computer system identifying the mobile hard disk belongs to the category of _ _ _ _ _ _ _ in the basic functions of the operating system.
A. Processor management B. Memory management C. Input/output device management D. Information management Answer: C(I/O)
8. The data communication system model consists of data source, data communication network and _ _ _ _ _ _.
A. sending equipment B. transmission channel C. receiving equipment D. data sink answer: D.
9. When printing a Word document, you cannot set _ _ _ _ _ _ _ _ in the Print dialog box.
A. Print page range B. Printer selection C. Page number position D. Number of copies printed Answer: C.
10. MediaPlayer in Windows XP does not support multimedia files in _ _ _ _ _ _ _ _ format.
A.MP3 B. MOV C. AVI D. MPEG Answer: B.
* MOV is a QuickTime movie format and an audio and video file format developed by Apple.
1 1. In the editing state of Word, the most intuitive and quick way to indent paragraphs and adjust left and right margins is to use _ _ _ _ _ _ _.
A. menu bar B. common toolbar C. format toolbar D. ruler answer: D.
12. In the Windows environment, to copy the contents of the currently active window or dialog box to the clipboard, the key used is _ _ _ _ _ _ _ _ _.
A.& lt print screen & gtb. & ltalt & gt+<; Print screen & gt
C.& ltCtrl & gt+& lt； Print screen & GTD.< shift & gt+< Print screen & gt
Answer: b (Copy the currently active window.
13. If you don't use the computer for a short time and let the system turn off the monitor and hard disk to reduce power consumption, it is generally better to choose _ _ _ _ _ _ _.
A. Turn off B. Stand by C. Sleep D. Log off the user Answer: B.
* Standby: the system saves the current state in memory, and then exits the system to maintain the minimum operation of CPU, memory and hard disk; The system is not really shut down, so a short shutdown is applicable.
* Hibernation: Save the image of the desktop and all open files and documents, and then turn off the power of the computer. When the power is turned on, files and documents will open on the desktop as they left.
14. On the desktop of Windows XP, _ _ _ _ _ _ is correct.
A only one window can appear, that is, the active window. B multiple windows can appear, but at most only one window is the active window.
C. Multiple windows can appear, but more than one is the active window. D. Multiple active windows can appear. Answer: B.
15. The sampling frequency of stereo dual channel is 44. 1kHz, and the quantization bit is 8 bits. The storage required for one minute of music in this format can be calculated according to the formula _ _ _ _ _ _ _.
A.44.1×1000×16× 2× 60/8 bytes B.44.1×1000× 8× 2× 60//kloc-0.
C.44.1×1000× 8× 2× 60/8 bytes d.44.1×1000×16× 2× 60//kloc-0.
Answer: the calculation formula is = sampling frequency × 1000 × quantization bits × number of channels × seconds /8 (kHz needs to be converted into 1000Hz).
16. The picture features of the objects in the same image are related, which is _ _ _ _ _ _ _ _.
A. temporal redundancy B. Spatial redundancy C. Visual redundancy D. Data redundancy Answer: D.
* Data redundancy: The repeated data in the data set is called data redundancy. There are many kinds of data redundancy in multimedia data, such as temporal redundancy, spatial redundancy, visual redundancy and structural redundancy.
17. About the description of sound, the correct one is _ _ _ _ _ _ _ _.
A. sound is a continuous waveform independent of time.
B. When recording with a computer, analog sound waves should be coded first.
C. When recording with a computer, the analog sound wave should be sampled first.
D. The storage space of digital sound is only related to the sampling frequency and the number of quantization bits. Answer: C.
(Sound is a continuous waveform related to time, and the size of storage space is related to sampling frequency, time and quantization bits. )
18. The image file type that can play animation effect is _ _ _ _ _ _ _ _ _.
A.JPG B.BMP C.GIF D.TIF Answer: C (others are still image files).
19. In the narration of transition animation, the correct one is _ _ _ _ _ _ _ _ _.
A. The intermediate transition frame is calculated by the computer according to the characteristics of the first and second key frames and the animation attribute requirements.
B transition animation does not need to establish the contents of the first and second key frames of the animation process.
C animation effect does not depend on human visual persistence characteristics.
D. When the frame rate reaches above 5fps, you can see more continuous video animations. Answer: B.
20. Belong to the video file extension is _ _ _ _ _ _ _.
A.JPEG B.MPEG C.HTML D.Mid Answer: B (JPEG still image MPEG moving image)
2 1. Regarding the e-mail system, the following statement is true _ _ _ _ _ _ _.
A. use file transfer protocol (FTP) to deliver mail.
B. The mail sent by the sender can reach the recipient's computer directly without the need for server transfer.
C. E-mail address is unique in the world.
D attachments in e-mails will not contain computer viruses. Answer: c
Hypertext transfer protocol in 22.TCP/IP protocol suite refers to _ _ _ _ _ _.
A.TCP B. IP C. HTTP D. ICMP answer: C.
23. The command specially used to test the connectivity between two computers configured with TCP/IP protocol is _ _ _ _ _ _ _.
A.Ping B. FTP C. Telnet D. URL Answer: A.
24. The broadband access technology using cable TV network for data transmission is _ _ _ _ _.
A.56k modem B.ISDN C.ADSL D. Cable modem
Answer: D (ADSL- asymmetric digital subscriber line, using telephone line, ISDN- digital telephone network)
25. The binary number of an IPv4 address is _ _ _ _ _ _ _ _.
A.32 B. 48 C. 128 D. 64 Answer: A (IPv6 is 128 bit).
Second, fill in the blanks
1. Computer technology and _ _ _ _ combined to form a computer network. Answer: Communication technology.
2. The biggest disadvantage of 2.USB interface is the transmission distance _ _ _ _ _.
Answer: Short (no more than 0.5m) Advantages: high-speed USB 2.0 480mb/s, USB 3.0 speed up to 5GB/s..
3. Computer system consists of computer software and computer hardware, in which computer software can be divided into _ _ _ _ _ and application software. Answer: System software
4. High-level programming languages can be divided into object-oriented high-level languages and _ _ _ _ _ oriented high-level languages. Answer: Process-oriented
5. In Windows, to close the current application, press ALT+_ _ _ _ _. Answer: F4
6. In Word, the file name of the default document template is _ _ _ _ _ _ _ _. Answer: normal.dot
* Open Word, click File | Properties and select the Summary tab to display the template.
7. Data compression algorithms can be divided into lossless compression and _ _ _ _ _ _ _ compression. Answer: Yes.
8.OSI divides the network architecture into physical layer, data link layer, network layer, transport layer, session layer, presentation layer and _ _ _ _ _ _.
Answer: Application
9. Computer networks can be divided into three categories according to the size of the accessible areas: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ A: LAN.
10. After the website is designed, the web files and folders must be _ _ _ _ through the web server, so that users on the Internet can access these homepages. Answer: release
Third, multiple choice questions
1.CPU consists of _ _ _ _ _ _ and other components.
A. arithmetic unit B. controller C. external memory D. memory answer: a B.
2. The object-oriented computer programming language is _ _ _ _ _ _ _.
A.c.b.c++c.javad.vb Answer: B C D (ordinary C language is process-oriented).
3. The prevention and control of computer virus should be carried out from three aspects: _ _ _ _ _ _.
A. prevention B. monitoring C. removal D. verification answer: ab C.
4. In Windows XP, the first step to create an application shortcut is _ _ _ _ _ _ _.
A. right-click the target location B. Right-click the object.
C. Drag the object with the right mouse button D. Click the left mouse button at the target location Answer: A B C.
5. The service functions of the Internet are _ _ _ _ _ _, etc.
A. remote login B. file transfer C. WWW service D. e-mail answer: ABC D.
Test paper b
I. Multiple choice questions
1. Feng? The computer with Neumann structure divides the computer into five parts: arithmetic unit, controller, _ _ _ _ _ _ _, input device and output device.
A. memory B. CPU C. cache D. hard disk answer: A (computer consists of five parts)
2. The decimal number 89 converted into hexadecimal number is _ _ _ _ _.
A.57H B. 59H C. 50H D. 89H Answer: Learn to use a calculator.
3. Information can spread in space through sounds, pictures and words, which is called _ _ _ _ _ of information.
A. timeliness B. transferability C. storability D. identifiability answer: B.
The information features are
* identifiability (divided into direct identification and indirect identification, direct identification refers to sensory identification, and indirect identification refers to identification through various test methods).
* storability (storage by various methods)
* Scalability (it will continue to expand over time)
* Compressibility (information can be refined and concentrated by processing, sorting, summarizing, induction, etc.)
* transitivity
* convertibility (can be converted from one form to another)
* Effective within a specific range (effective within a specific range, otherwise invalid)
4. In the following discussion about binary, the error is _ _ _ _ _ _ _.
A. binary has only two digits. B there are only "0" and "1" in the binary system.
C. The rule of binary operation is one for each binary. D. 1, the tenth from the right in the binary number, which is equivalent to the ninth power of 2. Answer: a.
5. At present, there are more and more interfaces for connecting the mouse with the host.
A.usbb.x.21c.rs-232d.rs-449 Answer: A.
* RS-232 and RS-449 are serial ports and interface with X.2 1 public data network.
6. In the synchronous satellite communication system, at least _ _ _ _ _ geosynchronous satellites are needed to cover the entire equatorial circumference.
A. 1 B. 2 C. 3 D. 4 answer: 3 (control range of each satellite 120 degrees).
7. When a computer runs a program, the program must be loaded into _ _ _ _ _ _ _ _, and then the processor can directly obtain instructions and data from this component.
A. keyboard B. hard disk C. memory D. external storage answer: C (CPU can only directly process data in memory)
8. About computer programming language, the correct statement is _ _ _ _ _ _ _ _.
A. Machine language is an explanatory language.
B the lowest level, that is, the lowest level language closest to hardware, is assembly language.
C any program written in a high-level language must be compiled and linked before execution.
D.Java, C++, C# and SQL are all high-level languages. Answer: D.
* Machine language can be directly executed.
* Assembly language is a language that is only higher than the direct manual writing of binary machine instruction code, which depends on the specific processor architecture and cannot be used universally. A program is needed to translate assembly language into machine language.
* High-level languages can be interpreted and compiled.
9. In the wireless communication network, if you want to realize long-distance data transmission, you need to establish a ground relay station for relay. The communication mode is _ _ _ _ _ _ _.
A. Microwave communication B. Ultrasonic communication C. Infrared transmission D. Bluetooth technology Answer: A.
10. In Word, files can also be saved in _ _ _ _ _ _ _ format.
A.jpg b.htmlc.xlsd.PPT Answer: B.
* in word, the file can be saved as doc dot html xml rtf, etc. You can open word, execute the Save command, and view the format.
The default extension of 1 1.PowerPoint presentation design templates is _ _ _ _ _ _ _.
A.pot B. pft C. ppt D. prt Answer: A
* Common file types of presentations: template-pot slide-pps presentation-ppt. You can view the extension of the template by creating a new presentation or saving the command.
12. In Windows XP, the recycle bin is used to store _ _ _ _ _ _ _.
A. File fragments B. Deleted files or folders
C. damaged file or folder D. cut text answer: B.
13. In Excel, you can fill a arithmetic progression with _ _ _ _ _ (the cell content is a constant instead of a formula).
A. insert menu command B. fill handle C. tools menu command D. replace menu command
Answer: B (fill handle cursor is+).
14. It is called _ _ _ _ _ _ _ technology to compress continuous video and sound information and put it on the network media server for users to watch while downloading.
A. streaming media B. network information transmission C. media technology D. network media answer: a.
15. In the window of the media player, after pressing the "Play" button, the button becomes _ _ _ _ _ _ _ _.
A. Back button B. Pause button C. Reverse state D. Time display sign Answer: B.
16. Two adjacent images in the image sequence have a great correlation with the previous image, which is _ _ _ _ _ _ _ _ _.
A. Spatial redundancy B. temporal redundancy C. Information entropy redundancy D. Visual redundancy Answer: B.
17. The correct description of graphic images is _ _ _ _ _ _ _ _.
Graphics are images. They are pictures drawn by computers.
B. After the graphics are input into the computer through the scanner, an image composed of pixels can be obtained.
C. after the image is input into the computer through the camera, it can be converted into a graph composed of pixels.
D. after digital compression, the picture can get the graphic answer: B.
* Graphics refers to the vector diagram composed of external contour lines, that is, straight lines, circles, rectangles, curves, charts, etc. Drawn by computer.
* Image refers to the actual scene picture captured by the input device or any picture stored in digital form.
18. The saying about MIDI files is _ _ _ _ _ _ _.
A.MIDI files use a series of instructions to represent sounds. B. MIDI files occupy more storage space than WAV files.
C.MIDI files need the support of sound card D, and the media player can play MIDI files directly. Answer: B.
MIDI is the digital interface of musical instruments. MIDI files do not directly record the pronunciation of musical instruments, but record various information or instructions of musical instruments, and do not contain streaming media information. The file size is small, and it needs to be converted into sound by a sound card driven by \ d. MIDI file is essentially an audio control file.
19. Among the following descriptions of animation, _ _ _ _ _ _ _ _ _ is incorrect.
A. The intermediate transition frame is calculated by the computer according to the characteristics of the first and second key frames and the animation attribute requirements.
B transition animation does not need to establish the contents of the first and second keyframes of the animation process.
C animation effect depends on human visual residual characteristics.
D. When the frame rate is above 12fps, you can see more continuous video animations. Answer: B.
20. The computer network formed in a school campus should belong to _ _ _ _ according to the distribution distance.
A. local area network B. metropolitan area network C. wide area network D. peer-to-peer network answer: a.
2 1. The IP address in the correct format is _ _ _ _ _.
a . 192. 168. 1.225 b . 192. 168.0 . 1 . c . 127. 1.654438+0.65 . 544366
* IP address consists of four numbers between 0 and 255. The fourth number cannot be 0 and 255(0 is the network address and 255 is the broadcast address).
* The address 127 is reserved for network software testing and communication between local processes. A packet with the network number 127 cannot appear on any network.
22. If a computer wants to access the computer network, the equipment that must be installed is _ _ _ _ _ _ _.
A. video capture card B. video card C. sound card D. network card answer: D.
23. Hypertext Transfer Protocol HTTP is the protocol on _ _ _ _ _.
A. data link layer B. network layer C. transport layer D. application layer answer: D.
* Common network applications, such as e-mail and file transfer, belong to the application layer.
24. The binary number of an IPv4 address is _ _ _ _ _ _ _ _.
A.32 B. 48 C. 128 D. 64 Answer: The binary number of IPv6 address is 128).
25.FTP is the abbreviation of _ _ _ _ _ _ _.
A. Hypertext Markup Language B. Bulletin Board System C. File Transfer Protocol D. Internet Protocol Answer: C.
Second, fill in the blanks
1. Plotter is an output device and scanner is a _ _ _ _ _ device. Answer: Input (the device where information enters the computer memory is input, and vice versa is output).
2. The electronic devices used by the first generation of digital electronic computers in the world are _ _ _ _ _ _. Answer: Electron tube.
3. There is a contradiction in the speed matching between 3.CPU and memory. Multi-level storage system hierarchy is usually used to solve or alleviate this contradiction. In order of speed, they are cache, memory, _ _ _ _ _ _. Answer: External memory (cache)
4. In a microcomputer, the basic storage unit of information is bytes, and each byte contains _ _ _ _ _ _ _ binary bits. Answer: 8
5. The instruction set arranged in a certain order to enable the computer to perform a certain task is called _ _ _ _ _ _ _. Answer: program
6. When deleting a file or folder in Windows Explorer, if you press the _ _ _ _ _ _ _ key while pressing the Delete key or clicking the Delete command, the file or folder will be permanently deleted. Answer: Shift (deleted objects do not enter the recycle bin)
7. In Windows, using memory to transfer data between applications can be completed by _ _ _ _ _ _ _ _ board. Answer: cut and paste.
8. The general resolution of human visual system is estimated to be 64 gray levels, while the general image quantization uses 256 gray levels. This redundancy is called _ _ _ _ _ _ _. Answer: visual redundancy
9. Every webpage on the 9.WWW has an independent address called _ _ _ _ _ _ _ _. Answer: URL (Uniform Resource Locator)
10.OSI divides the network architecture into physical layer, data link layer, _ _ _ _ _ _ layer, transport layer, session layer, presentation layer and application layer. Answer: Network layer
Third, multiple choice questions
1. There are many ways to infect computer viruses, mainly _ _ _ _ _ _ _.
A. Network transmission B. Use other people's mobile storage casually
C. using illegal pirated software D. using computer hibernation function answer: A B C.
2. Commonly used mobile storage products are roughly _ _ _ _ _ and so on.
A. flash card B. USB flash drive C. mobile hard disk D. floppy disk answer: ABC D.
3. In Word, you can use the "Save As …" dialog box to _ _ _ _ _.
A. name the document B. change the storage location of the document C. change the type of the document D. specify the size of the document.
The answer is: BC.
4. There are _ _ _ _ _ _ _ kinds of image files with no animation effect.
A.JPG B.BMP C.GIFD.TIF Answer: A B D (GIF files can be animated).
5. The method available for accessing the Internet is _ _ _ _ _.
A.ISDN B. DDN C. ADSL D. PSTN Answer: ABC D.
* ISDN: Integrated Services Digital Network, DDN: Digital Data Network, ADSL: Asymmetric Digital Subscriber Loop, PSTN: Public Telephone Network. In addition, there are cable modems, telecom broadband, wireless networks and other access methods.