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multiple choice
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Which of the following statements about PC hard disk storage is wrong ( ).
A. The data block on the hard disk should be located by three parameters: cylinder number, sector number and magnetic head number. B.
At present, the hard disk generally contains a cache (Cache) composed of DRAM chips.
C. At present, the interface between the hard disk and the host is mostly SATA interface
D. The increase of hard disk capacity is mainly due to the increase in the number of disks. Currently, hard disks generally consist of dozens of disks.
Correct answer: D -
Which of the following statements about PC commonly used I/O devices is wrong ( ).
A. At present, the desktop keyboard usually has more than 100 keys, and the notebook computer keyboard has more than 80 keys.
B. The current popular mouse is an optical mouse, and its interface with the host computer has two types: PS/2 and USB.
C. The wide-screen LCD monitor has an aspect ratio of 16:9 or 16:10
D. Printing speed is an important performance index of the printer, and the unit of speed is usually dpi.
The correct answer: D -
Storage can be divided into internal memory and external storage, the following storage ( ) belongs to external storage.
A. High-speed cache (Cache)
B. Hard disk memory
C. Display memory
D. CMOS memory
Correct answer: B -
Optical disc memory has the advantages of high recording density, large storage capacity, and long-term information preservation. Which of the following statements about CD storage is wrong ( ).
A. The CD-RW disc recorder can burn CD-R and CD-RW discs
B. The full English name of DVD is Digital Video Disc, which is a digital video disc, which can only store video information.
C. The capacity of DVD discs is generally several Megabytes
D. Most of the lasers used in DVD disc storage are red lasers.
Correct answer: B -
Which of the following statements about PC auxiliary storage is wrong ( ).
A. The disk rotation speed of the hard disk is very fast, and it is generally thousands of revolutions per second at present.
B. The serial ATA (SATA) interface hard disk used in recent years has a faster transmission rate than the IDE interface.
C. Most of the current mobile hard disk Using USB 2.0 interface, its transmission rate can reach tens of megabytes per second.
The rate of a CD-ROM drive with 40 times speed can reach about 6MB/s. The
correct answer: A -
Which of the following statements about PC auxiliary storage is correct ( ).
A. The internal transmission rate of the hard disk is much higher than the external transmission rate
B. For CD burners, the speed of burning information is generally lower than the speed of reading information
C. The data transmission rate of the mobile hard disk using the USB 2.0 interface is about Hundreds of megabytes per second
D. The data transfer rate of CD-ROM is generally faster than USB 2.0
Correct answer: B -
Which of the following statements about the auxiliary memory of the current PC is wrong ( ).
A. The capacity of the hard disk is getting bigger and bigger, this is because the number of disks in the hard disk is increasing. B. The
internal transmission rate of the hard disk is generally lower than the external transmission rate
. C. The USB flash memory technology is used, which belongs to the semiconductor memory.
D. At present A common COMBO optical drive is an optical drive that combines CD-RW and DVD-ROM.
Correct answer: A -
At present, the external memory of PC (referred to as "external memory") mainly includes floppy disk, hard disk, optical disk and various mobile memories. Which of the following statements about PC external storage is wrong ( ).
A. The floppy disk has been eliminated due to its small capacity, slow access speed, and easy damage.
B. The capacity of CD discs is generally hundreds of megabytes, while the capacity of DVD discs is several gigabytes.
C. Hard disk It is a kind of external memory with large capacity and fast access speed. At present
, the speed of mainstream hard disks is several hundred revolutions per minute. The bytes are not equal
Correct Answer: C -
Which of the following statements is incorrect about the CD memory used in computers ( ).
A. CD-R is a kind of optical disk memory that can only be read but not written
B. CD-R is a kind of optical disk memory that can be read and written
C. When using a CD, it must be equipped with a CD drive
D. DVD drive can also read Get the data on the CD
correct answer: A -
Which of the following statements about CD memory is incorrect is ( ).
A. DVD is the same as CD disc memory, there are many different specifications
B. CD-ROM drive can read the data on DVD disc
C. The storage capacity of single-layer disc of Blu-ray disc is 25GB
D. The memory capacity of DVD is higher than that of CD much larger
Correct Answer: B -
CD-ROM memory uses ( ) to read information on the disc.
A. Laser
B. Magnetic head
C. Infrared ray
D. Microwave
Correct answer: A -
The Cache in the personal computer memory system is ( ).
A. Read-only memory
B. Cache memory
C. Programmable read-only memory
D. Flash memory
Correct answer: B -
Which of the following statements about the storage capacity of the optical disc is incorrect ( ).
A. The storage capacity of 80mmCD is about 200 megabytes
B. The storage capacity of 120 mmCD is about 600 megabytes
C. The storage capacity of 120 mmDVD with single side and single layer is about 4.7GB
D. The storage capacity of 120 mm Blu-ray with single side and single layer The disc storage capacity is about 17GB
Correct answer: D -
Which of the following devices can be used as an input device is ( ).
①Touch screen ②Sensor ③Digital camera ④Microphone ⑤Speaker ⑥Plotter ⑦Display
A. ①②③④
B. ①②⑤⑦
C. ③④⑤⑥
D. ④⑤⑥⑦Correct
answer: A -
Which of the following statements about the central processing unit (CPU) and memory (memory stick) of a PC is correct ( ).
A. The CPUs used in PCs are all Pentium series chips produced by Intel, and the CPUs produced by other manufacturers are not compatible with them. B.
At present, there are dual-core microprocessors (such as Core 2 Duo), but there are no quad-core microprocessors. A microprocessor
C. Generally speaking, the access speed of DRAM is slower than that of SRAM
D. Generally speaking, there is only one DRAM or SRAM chip on a memory stick
Correct answer: C -
The CPU contains dozens of storage devices used to temporarily store operands and intermediate calculation results, which are called ( ).
A. Arithmetic unit
B. Controller
C. Register set
D. Front side bus
Correct answer: C -
In a PC, the input/output devices are connected with their respective controllers through ( ).
A. I/O bus
B. I/O controller
C. I/O interface
D. I/O device
Correct answer: C -
According to the principle of "stored program control", to be precise, how each component of the computer hardware operates is determined by ( ).
A. The instructions executed by the CPU
B. The operating system
C. The user
D. The controller
Correct answer: A -
When it is necessary to carry about 20GB of gallery data, people usually choose ( ) to store data in the storage provided below.
A. CD disc
B. Floppy disk
C. USB flash drive
D. Mobile hard disk
Correct answer: D -
Which of the following statements about CPU structure is wrong ( ).
A. The controller is used to explain the meaning of instructions, control the operation of the arithmetic unit, and record the internal state B. The
arithmetic unit is used to perform various arithmetic and logical operations on data
C. The CPU only includes two parts: the arithmetic unit and the controller
D . There can be multiple operators, such as integer operators and floating-point operators.
Correct answer: C