Lecture 2

Question 1

What is hardware used for

Answer 1

Processing, output, input and storage

Question 2

3 factors of hardware

Answer 2

appropriateness, speed and cost.

Question 3

Computer hierarchy

Answer 3

Super computers
Mainframe Computers
Midrange Computers
• Microcomputers
• Laptop and notebook computers
• Tablet computers
• Wearable computers

Question 4

Super computers

Answer 4

Most expensive - large dataset
Military, healthcare, banking, scientific
FLOPS: floating point operations per second (decimal)
PETAFLOPS

Does not refer to a specific technology. It indicates the fastest computers available at any given time.
Loading…
◦ Measure for supercomputer speed: 1,100 Petaflop
◦ Petaflops: 10^15 floating point operations per second

Question 5

Mainframe computures

Answer 5

Tetraflops
- amazon - transaction processing system
- airline revaluation system
- student grading response

Transaction processing system & enterprise resource planning
Computers used primarily by large organizations for strategic, mission critical applications. For example:
- TPS, ERP
Cost: from $75,000 to millions
Teraflops: trillions of floating point op per second.

Question 6

Midrange computures

Answer 6

Small scale organization (IS)
- info coming into server

• A class of computers which fall in between mainframe computers and microcomputers.
• •
• •
was called minicomputers Evolved to servers
Perform the same functions as mainframe computers.
Cost: from hundreds to tens of thousands

Question 7

Types of clients

Answer 7

Fat client: functionality does not depend upon interest
Ex/ interact

Thin client
Ex/ google chrome

Question 8

Server client architecture

Answer 8

•
Microcomputers
-Fat clients
- Thin clients
- Laptop and notebook
computers
- Tablet computers Wearable computers

Question 9

Components of hardware

Answer 9

1. Input Device: mouse, key board, microphone, web camera
   -> human activity text, number,
   -> source data

automation: barcode scannen, optical character reader, touch ID, face recognition, QR code, magnetic ink reader
collection
Control
2. Output Device
3. Central Processing Unit

Question 10

What is happening to processors as technology progresses

Answer 10

Size = decreasing
Speed = increasing
Cost = decreasing

Question 11

The central processing unit

Answer 11

•Performs the actual computation or “number crunching” inside any computer.

A microprocessor includes:
- control unit
- arithmetic - logic unit (ALU)
- registers

Question 12

Computer memory

Answer 12

PRIMARY

RAM-> random access memory
- read and write
- volatile in nature
- temporary

ROM -> read only memory
- non volatile
- Read only
- Vendor -> file -> operating system

SECONDARY
- hard drive, pen drive, USB, CD, DVD
- permanent in nature

Question 13

Comparing primary and secondary storage

Answer 13

PRIMARY
If it’s volatile - YES (not ROM tho)
Access time - FASTER
Price - HIGHER
Capacity - LOWER

SECONDARY
If it’s volatile - NO
Access time - SLOWER
Price - LOWER
Capacity - HIGHER

Question 14

Total cost of ownership

Answer 14

•Total cost of ownership: refers to all direct and indirect costs associated with a purchased or acquired asset over its entire lifetime
◦ The cost of IT infrastructure is not limited to the purchase and installation of servers.
•Provide a cost basis for any financial analysis of an anticipated or actual IT investment.

Direct: purchase cost, transportation, setup costs, maintained costs, insurance,

Indirect: disposable cost, enviromental fat, IT salaries, infrastructure and power

Question 15

Integration cost and migration cost

Answer 15

Integration cost
ES <-> NS
Migration cost (TIME)
SI <-> S2