|
|
Introduction To Computer
A computer is a general purpose device that can be programmed to carry out a finite set of arithmetic or logical operations.
Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem.
Conventionally, a computer consists of at least one processing element, typically a central processing unit (CPU) and some
form of memory. The processing element carries out arithmetic and logic operations, and a sequencing and control unit
that can change the order of operations based on stored information. Peripheral devices allow information to be retrieved from
an external source, and the result of operations saved and retrieved.
The first electronic digital computers were developed between 1940 and 1945 in the United Kingdom and United States.
Originally they were the size of a large room, consuming as much power as several hundred modern personal computers (PCs).
In this era mechanical analog computers were used for military applications.
Modern computers based on integrated circuits are millions to billions of times more capable than the early machines,
and occupy a fraction of the space.[2] Simple computers are small enough to fit into mobile devices, and mobile computers
can be powered by small batteries. Personal computers in their various forms are icons of the Information Age
and are what most people think of as “computers.” However, the embedded computers found in many devices from MP3 players to
fighter aircraft and from toys to industrial robots are the most numerous.
Answer 1: Airthemetic And Logic Operator
Airthemetic Operator
An arithmetic operator is a mathematical function that takes two operands and performs a calculation on them. They are used in common arithmetic and most computer languages contain a set of such operators that can be used within equations to perform a number of types of sequential calculation. Basic arithmetic operators include: Addition (+), subtraction (-), multiplication (x) and division (÷) Computers use different symbols in programming to represent some of these: Addition (+), subtraction (-), multiplication (*) and division (/) More complex operators such as square root (Öx) also act as arithmetic operators but the basic plus, minus, multiply and divide are the fundametal operators.
In logic, a logical connective (also called a logical operator) is a symbol or word used to connect two or more sentences (of either a formal or a natural language) in a grammatically valid way, such that the sense of the compound sentence produced depends only on the original sentences.
Logical Operator
The most common logical connectives are binary connectives (also called dyadic connectives) which join two sentences which can be thought of as the function's operands. Also commonly, negation is considered to be a unary connective.
Logical connectives along with quantifiers are the two main types of logical constants used in formal systems such as propositional logic and predicate logic. Semantics of a logical connective is often, but not always, presented as a truth function.
|
Answer 2: Sequence operations
The mathematical rules that determine the correct order for solving any sequence of math operations. Powers and roots are solved before multiplication and division, which in turn are solved before addition and subtraction.
|
Answer 3:Central processing unit(CPU)
Pronounced as separate letters, CPU is the abbreviation for central processing unit. Sometimes referred to simply as the central processor, but more commonly called processor, the CPU is the brains of the computer where most calculations take place. In terms of computing power, the CPU is the most important element of a computer system.
|
Answer 4:Control unit
The Control Unit (CU) is the circuitry that controls the flow of information through the processor, and coordinates the activities of the other units within the processor. It is the "brain within the brain", as it controls what happens inside the processor, which in turn controls the rest of the PC.
|
Answer 5:Peripheral device
A peripheral is a device that is connected to a host computer, but not part of it. It expands the host's capabilities but does not form part of the core computer architecture. It is often, but not always, partially or completely dependent on the host.
There are three different types of peripherals:
- Input, used to interact with, or send data to the computer (mouse, keyboards, etc.)
- Output, which provides output to the user from the computer (monitors, printers, etc.)
- Storage, which stores data processed by the computer (hard drives, flash drives, etc.)
|
Answer 6:External source
In computer networking, Network Address Translation (NAT) is the process of modifying IP address information in IPv4 headers while in transit across a traffic routing device.
The simplest type of NAT provides a one-to-one translation of IP addresses. RFC 2663 refers to this type of NAT as basic NAT, which is often also called a one-to-one NAT. In this type of NAT only the IP addresses, IP header checksum and any higher level checksums that include the IP address are changed. The rest of the packet is left untouched (at least for basic TCP/UDP functionality; some higher level protocols may need further translation). Basic NATs can be used to interconnect two IP networks that have incompatible addressing.
However, it is common to hide an entire IP address space, usually consisting of private IP addresses, behind a single IP address (or in some cases a small group of IP addresses) in another (usually public) address space. To avoid ambiguity in the handling of returned packets, a one-to-many NAT must alter higher level information such as TCP/UDP ports in outgoing communications and must maintain a translation table so that return packets can be correctly translated back. RFC 2663 uses the term NAPT (network address and port translation) for this type of NAT. Other names include PAT (port address translation), IP masquerading,
NAT Overload and many-to-one NAT.Since this is the most common type of NAT it is often referred to simply as NAT.
|
Answer 7:Electronic Digital Computer
A computer is a general purpose device that can be programmed to carry out a finite set of arithmetic or logical operations. Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem.
Conventionally, a computer consists of at least one processing element, typically a central processing unit (CPU) and some form of memory. The processing element carries out arithmetic and logic operations, and a sequencing and control unit that can change the order of operations based on stored information. Peripheral devices allow information to be retrieved from an external source,
and the result of operations saved and retrieved.
|
Answer 8:Machenical analog computer
An analog computer is a form of computer that uses the continuously changeable aspects of physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved. In contrast, digital computers represent varying quantities symbolically, as their numerical values change. As an analog computer does not use discrete (exact) values, but rather continuous (approximate) values, processes cannot be reproduced with exact equivalence, as they can with Turing machines.
|
Answer 9:Integrated circuit(IC)
An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip,
or a microchip) is a set of electronic circuits on one small plate ("chip") of semiconductor material, normally silicon. This can be made much smaller than a discrete circuit made from independent components
Integrated circuits are used in virtually all electronic equipment today and have revolutionized the world of electronics. Computers, mobile phones, and other digital home appliances are now inextricable parts of the structure of modern societies,
made possible by the low cost of producing integrated circuits.
|
|