Computers Hardware and Software

1
Computers- Hardware and Software

• FE Preparation
• Autar Kaw
• kaw_at_eng.usf.edu
• Mechanical Engineering

2
Syllabus

• Computers 7
• Terminology (e.g., memory types, CPU, baud rates,
  Internet)
• Spreadsheets (e.g., addresses, interpretation,
  what if, copying formulas)
• Structured programming (e.g., assignment
  statements, loops and branches, function calls)

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Computers- Hardware and Software

• All computers have three main components

Main Memory
Output Device
Input Device
4
Definitions

• Accumulators
• Program Counter
• Instruction Register
• Stacks

5
More Definitions

• Bus or Channel
• Address Bus
• Data Bus
• Control Bus

6
More Definitions

• Input/Output Devices
• Parallel Interface
• Serial Interface

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More Definitions

• Flow Control
• Random Access Memory
• Hard Drives, its Parts, Rotational Delay
• Sequential Access Devices
• Real and Batch Time processing
• Multi-Tasking and Time Sharing

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More Definitions

• Teleprocessing
• Asynchronous Transmission
• Synchronous Transmission
• Communication Lines
• Errors in Transmission

9
Question

• Q How many states can five 8-bit memory
  locations be in?
• 28
• 25
• 240
• 213

Answer -3
10
Question

• Q How long will it take to transmit 400 k (byte)
  text file using 56 k modem in simplex mode?
• 1 min
• 2 min
• 10 min
• 15 min

Answer -1
11
Question

• Q How many 8-bit bytes in a 4 MB memory?
• 4,000,000
• 32,000,000
• 4,194,304
• 4,000

Answer -3
12
Question

• Q A hard disk drive with 5 cm diameter platters
  turns at 3000 RPM. What is the average latency
  for the drive?
• 0.003 s
• 0.01 s
• 0.02 s
• 0.04 s

Answer -2
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Software

• ASCII
• EBCDIC
• Program Design
• Flow Chart Languages
• Structured Programming
• Fields, Records and File Types

14
Question

• Q Base 10 equivalent of (257.725)a is?

15
Question

• Q Base a equivalent of (375.35)10 is?

16
Question

• Q How do I convert between bases 2, 8 and 16?

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Negative Integer Representation

• Sign magnitude
• 1s complement
• 2s complement

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Negative Integer Representation

• (29)10 (0011101)2
• (-29)10(11100010) 2 - 1s complement
• (-29)10 (11100011) 2 2s complement

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Negative Number Representation

• (40)10 (0101000) 2
• (-40)10(11010111) 2 - 1s complement
• (-40)10 (11011000) 2 2s complement

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What is a program?
Input
Processing
Output
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Planning a program

• Analyze define a problem
• Design plan the solution interface
• Code
• Test Debugging
• Complete Documentation

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Flow Chart Basics
23
Question

• SUM1
• FOR I1 TO 10
• SUMSUMI
• NEXT I
• 1
• 45
• 55
• 56

Answer - 4
24
Question

• I2
• J3
• If IJ gt6 then answerPaul
• If IJgt5 then answerPeter
• If IJgt 4 then answerLawrin
• Lawrin
• Peter
• Paul
• Ellis

Answer -1
25
Question

• If A4 is copied from C4, sum (a1a4) is
• A. 9 B. 17 C. 8 D. 0

26
Question

• If C4 is the distance covered by a body in A3
  seconds, what formula would you use in A5 to
  calculate the speed
• A. A3/C4 B. C4/A3 C. C4/C3 D. A4/A3

Answer -2
27
Question

• If formula A3C1B2 is used in A4 and then copied
  to A5, the value in A5 would be
• A. 33 B. 75 C. 81 D. 111

28
Question

• If formula A3C1B2 is used in A4 and then
  copied to A5, the value in A5 would be
• A. 33 B. 75 C. 81 D. 111

29
Question

• If formula A3C1B2 is used in A4 and then
  copied to A5, the value in A5 would be
• A. 33 B. 75 C. 81 D. 111

30
Question

• If formula A3C1B2 is used in A4 and then
  copied to A5, the value in A5 would be
• A. 33 B. 75 C. 81 D. 111

31
Question

• Q What will be printed
• I2
• If Igt2 then Print ABC Else Print DEF
• ABC
• DEF
• ABCDEF
• Nothing printed

Answer -2
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An Afternoon Session Question

• The following algorithm is written for finding
  root of a nonlinear equation f(x)0
• INPUT X, N
• FOR I1 TO N
• X X F(X)/F(X)
• NEXT I
• PRINT X

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Questions

• Q What algorithm does the program represent?
• Runge-Kutta Method
• Bisection Method
• Secant Method
• Newton-Raphson Method

Answer -4
34
Questions

• Q What would be the value of x if the input
  value of x is 16, the function f(x)x2-4 and n4
• 2.619
• 2.073
• 16.000
• Division by zero will precede

Answer - 2
35
Questions

• Q What would be the value of x if input value of
  x 0, the function f(x)x2-4 and n4
• 8.125
• 4.308
• 2.073
• Division by zero will precede

Answer - 4
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Write a program to find ex using Maclaurin Series
Choose 5 terms
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Eulers Method
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Trapezoidal Rule
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First, Second and Last Rule of Learning

• If you don't let a teacher know at what level you
  are - by asking a question, or revealing your
  ignorance - you will not learn or grow. You can't
  pretend for long, for you will eventually be
  found out. Admission of ignorance is often the
  first step in our education.
• Stephen Covey - Seven Habits of Highly
  Effective People

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Thank You

• Thank you
• Best of Luck
• Your performance on EIT is very important to you
  as well as to the reputation of your school.