The CPU is composed of two components，which areA．arithmetic logic unit and controllerB．memory and controllerC．arithmetic logic unit and memoryD．controller and storage

A digital computer is a system composed of four distinct elements: a central processing unit，input devices, memory storage devices, and_______devices.

A. hard ware

B. hard disk

C. output

D. monitor

A、hard ware

B、output

C、monitor

D、hard disk

We know a computer is a machine that processes data(stored in main memory)into information, under control of a stored program. We also know that, internally, a computer is a binary machine; thus the data and the program instruictions must be stored in binary form. Characters are represented in(71). Numbers are stored as binary numbers, with each bit's positional value significant. A computer's main memory is divided into bytes, words or both(depending on the system), and each of these basic storage units is assigned an(72). Using this address, the processor can read or write selected bytes or words.

The processor consists of a clock, an instruction control unit, an arithmetic and logic unit, and registers. Once a program is stored in main memory, the processor can begin to execute it. During(73), the instruction control unit fetches an instruction from main memory; during(74), the arithmetic and logic unit executes it. Precisely timed electronic pulses generated by the clock drive this basic(75)

A．a binary code

B．words

C．registers

D．positional values

______ means a unit in which goods are totally enclosed by sufficient strong boundaries such as a freight container, a tank or a vehicle unit with fabric sides or tops.

A.UNIT

B.CONTAINER

C.VEHICLE

D.CLOSED TYPE UNIT

A.process business logic

B.store business logic in the database

C.retrieve business logic from the database

D.manage communication between desktop/client tier and database tier

The CPU is composed of two components, which are(66).

A．asthmatics logic unit and controller

B．arithmetic logic unit and memory

C．memory and controller

D．controller and storage

The objective of （ ）is to determine what parts of the application software will be assigned to what hardware.The major software components of the system being developed have to be identified and then allocated to the various hardware components on which the system will operate. All software systems can be divided into four basic functions. The first is（ ）. Most information systems require data to be stored and retrieved,whether a small file,such as a memo produced by a word processor,or a large database,such as one that stores an organization’s accounting records. The second function is the （ ）,the processing required to access data,which often means database queries in Structured Query Language. The third function is the （ ）,which is the logic documented in the DFDs,use cases,and functional requirements.The fourth function is the presentation logic,the display of information to the user and the acceptance of the user’s commands.The three primary hardware components of a system are （ ）.

A.architecture design B.modular design C.physical design D.distribution design A.data access components B.database management system C.data storage D.data entities A.data persistence B.data access objects C.database connection D.dataaccess logic A.system requirements B.system architecture C.application logic D.application program A.computers,cables and network B.clients,servers,and network C.CPUs,memories and I/O devices D.CPUs,hard disks and I/O devices