What is the definition of a computer?
An electronic device that accepts data, processes it according to stored instructions, stores results, and produces output
Originally meant a machine for fast arithmetic.
What is the difference between data and information?
- Data: raw, unorganized facts or figures without context
- Information: processed or organized data that has meaning
Information is useful in decision-making.
What are the four stages of the Processing Cycle (IPO Cycle)?
- Input: Accepts data
- Processing: Manipulates data
- Output: Produces results
- Storage: Saves data
This cycle is fundamental to how computers operate.
What are the main categories of hardware in a computer system?
- Input Devices
- Output Devices
- Processing Unit
- Storage Devices
Hardware refers to the physical components of a computer.
What is the definition of software?
Set of programs that tell the hardware what to do
Types include system software, application software, and utility programs.
What does peopleware refer to?
People involved in designing, developing, and using the computer system
Examples include programmers, analysts, and IT support.
Name the four classifications of computers based on purpose.
- General-Purpose Computers
- Special-Purpose Computers
General-purpose computers perform various tasks, while special-purpose computers are built for specific functions.
What are the capabilities of computers?
- Speed
- Accuracy
- Storage
- Versatility
- Automation
- Connectivity
- Reliability
These capabilities highlight the strengths of computer systems.
What are the limitations of computers?
- Dependent on User Input
- Cannot Decide on Their Own
- No Feeling
- Cannot Implement Policies
These limitations emphasize the need for human involvement.
What is the first generation of computers known for?
The use of vacuum tubes as a means of storing data in memory
This generation lasted from 1946 to 1959.
What is the second generation of computers characterized by?
The use of transistors, diodes, and magnetic storage
This generation lasted from 1959 to 1965.
What significant development occurred in the third generation of computers?
The use of integrated solid-state circuitry
This generation lasted from 1965 to 1971.
What is the focus of the fourth generation of computers?
Development of multiprocessing, multiprogramming, and microprocessors
This generation lasted from 1971 to 1980.
What is the fifth generation of computers based on?
Artificial intelligence and ULSI technology
This generation aims to create devices that respond to natural language input.
What is the Input-Process-Output-Storage cycle?
A cycle that describes how a computer operates
It includes accepting data, processing it, producing output, and storing results.
What is the binary system?
A base 2 number system that uses digits 0 and 1
Each position represents a power of 2.
How do you convert binary to decimal?
Multiply each bit by its positional value (2ⁿ) and sum up
Example: (1011)₂ = 1×2³ + 0×2² + 1×2¹ + 1×2⁰ = 11₁₀.
What is the octal system?
A base 8 number system that uses digits 0–7
Each position represents a power of 8.
What is the hexadecimal system?
A base 16 number system that uses digits 0–9 and letters A–F
A=10, B=11, …, F=15.
What is the definition of data representation?
The method of encoding information in a format suitable for processing
It includes numeric, non-numeric, signed, and unsigned representations.
What are the types of data representation?
- Numeric
- Non-Numeric
- Signed
- Unsigned
- Fixed
- Floating
These types categorize how data is represented in computing.
What is the purpose of the Arithmetic Logic Unit (ALU)?
Performs mathematical and logical operations
It is a key component of the CPU.
What is the role of the Control Unit (CU)?
Directs operations of the processor
It coordinates the activities of the CPU.
What are the main categories of software?
- System Software
- Application Software
- Utility Programs
Each type serves a different purpose in managing and utilizing computer hardware.
