“Computer is an electronic machine that can store, recall and process data. It can perform
tasks or complex calculation according to a set of instructions or programs. The terms and
definitions used in computer system
The presentation given at MSBTE sponsored content updating program on 'PC Maintenance and Troubleshooting' for Diploma Engineering teachers of Maharashtra.
Venue: Government Polytechnic, Nashik
Date: 17/01/2011
Session-3: Internal Components of PC
“Computer is an electronic machine that can store, recall and process data. It can perform
tasks or complex calculation according to a set of instructions or programs. The terms and
definitions used in computer system
The presentation given at MSBTE sponsored content updating program on 'PC Maintenance and Troubleshooting' for Diploma Engineering teachers of Maharashtra.
Venue: Government Polytechnic, Nashik
Date: 17/01/2011
Session-3: Internal Components of PC
Now we discuss job analysis:
We discuss its outcome, uses of job analysis information,
job analysis process (steps), method of job analysis information, writing a job description, writing a job specification,
If any confusion then tells in the comment section.
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
UiPath Test Automation using UiPath Test Suite series, part 5DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 5. In this session, we will cover CI/CD with devops.
Topics covered:
CI/CD with in UiPath
End-to-end overview of CI/CD pipeline with Azure devops
Speaker:
Lyndsey Byblow, Test Suite Sales Engineer @ UiPath, Inc.
GridMate - End to end testing is a critical piece to ensure quality and avoid...ThomasParaiso2
End to end testing is a critical piece to ensure quality and avoid regressions. In this session, we share our journey building an E2E testing pipeline for GridMate components (LWC and Aura) using Cypress, JSForce, FakerJS…
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Sudheer Mechineni, Head of Application Frameworks, Standard Chartered Bank
Discover how Standard Chartered Bank harnessed the power of Neo4j to transform complex data access challenges into a dynamic, scalable graph database solution. This keynote will cover their journey from initial adoption to deploying a fully automated, enterprise-grade causal cluster, highlighting key strategies for modelling organisational changes and ensuring robust disaster recovery. Learn how these innovations have not only enhanced Standard Chartered Bank’s data infrastructure but also positioned them as pioneers in the banking sector’s adoption of graph technology.
Alt. GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using ...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
2. The System Unit
• What is the system
unit?
Case that contains electronic
components of the computer used
to process data
Sometimes called
the chassis
2
3. The System Unit
• What are common components inside the
system unit?
Memory
Adapter cards
Sound card
Modem card
Video card
Network card
Ports
Drive bays
Power supply
power supply
ports
drive bays
processor
memory
sound card
video card
modem card
network card
Processor
3
5. The System Unit
• What is the
motherboard?
Main circuit
board in system
unit
Contains adapter
cards, processor
chips, and
memory chips
Also called
system board
processor chip
adapter cards
memory chips
memory slots
motherboard
Expansion
slots for
adapter cards
5
6. The Motherboard and CPU
• The motherboard is the main
circuit board of a
microcomputer. It contains
the central processing unit
(CPU), the Basic Input/Output
System (BIOS), memory,
mass storage interfaces,
serial and parallel ports,
expansion slots, and all the
controllers for standard
peripheral devices like the
keyboard, disk drive and
display screen.
6
7. The System Unit
• What is a chip?
dual inline
packages (DIP)
holds memory
chips
pin grid
array (PGA)
package
holds processor
chips
Small piece of semi-conducting
material on which integrated
circuits are etched
Integrated circuits contain
many microscopic pathways
capable of carrying electrical
current
Chips are packaged so they can
be attached to a circuit board
7
8. Processor
Control
Unit
Arithmetic
Logic Unit (ALU)
Arithmetic
Logic Unit (ALU)
Processor
What is the central processing unit (CPU)?
Input
Devices
Storage
Devices
Output
Devices
Interprets and carries
out basic instructions
that operate a computer
Memory
Data Information
Instructions
Data
Information
Instructions
Data
Information
Control
Unit
Control unit directs and
coordinates operations in
computer
Arithmetic logic unit
(ALU) performs
arithmetic, comparison,
and logical operations
Also called the processor
8
9. Processing Sequence
Two crucial aspects are related with Processors
& Processing
1. Machine Cycles
• Control unit and memory working together to perform all
instructions on computer
• Two cycles
– Instruction Cycle (Fetch instruction and translate them)
– Fetch
– Decode
– Execution Cycle (Process and Produce(store) results)
– Execute
– Store
9
10. Processing Sequence
2. Registers
• To execute machine cycles, the control unit needs temporary
storage spaces called “Registers”
• Part of Processor not Storage or Memory devices
• These are faster than the main memory
• Their purpose is to hold most frequent instructions carried out
by processors and therefore they eventually speeds us the
execution process
10
11. Stores location
from where instruction
was fetched
Processor
Stores
instruction while it is
being decoded
• What is a register?
Stores data
while ALU
computes it
Stores results
of calculation
Temporary high-speed storage area that holds
data and instructions
11
13. Processor
Control Unit
Memory
ALU
Processor
What is a machine cycle?
Step 1. Fetch
Obtain program instruction
or data item from memory
Step 2.
Decode
Translate
instruction into
commands
Step 4. Store
Write result to memory
Step 3. Execute
Carry out command
Four operations of the CPU comprise a machine cycle
13
15. Processor
• What is pipelining?
CPU begins fetching second instruction before
completing machine cycle for first instruction
Results in faster processing
15
16. Processor
What is the system clock?
FLOPS
Floating Point Operations
per second
Pace of system
clock is clock speed
Most clock speeds are
in the gigahertz (GHz)
range (1 GHz = one
billion ticks of system
clock per second)
Processor speed can
also be measured in
millions of instructions
per second (MIPS)
Controls timing of all computer operations
Generates regular electronic pulses, or ticks, that set
operating pace of components of system unit
Each tick is a clock cycle (million to billion times in 1 sec)
16
17. Chip-for chip upgrade
replace the chip
Processor
• What are the types of processor
upgrades?
Piggyback upgrade
stack new chip on top of old one
Daughterboard upgrade
chip is on adapter card that plugs into motherboard
17
18. Processor
What is a zero-insertion force (ZIF) socket?
Step 2.
Insert the chip.
Step 1.
Lift the lever on the socket.
lever
Step 3.
Push the lever down.
lever
Allows you to install and remove chips with no force
18
19. Processor
What is parallel
processing?
Control Processor
Processor 1
Memory
Processor 2
Memory
Processor 3
Memory
Processor 4
Memory
Results combined
Using multiple
processors
simultaneously to
execute a program
faster
Requires special
software to divide
problem and bring
results together
SIMD v/s MIMD
19
20. Data Representation
How do computers represent data?
Recognize only two
discrete states: on or off
Use a binary system to
recognize two states
Use Number system with
two unique digits: 0 and
1, called bits (short for
binary digits)
Most computers are digital
20
21. Data Representation
What is a byte?
Eight bits grouped together as a unit
Provides enough different combinations of 0s and 1s
to represent 256 individual characters
Numbers
Uppercase
and lowercase
letters
Punctuation
marks
Encoding
21
22. Data Representation
What are three popular coding systems to represent
data?
ASCII—American Standard Code for Information Interchange
EBCDIC—Extended Binary Coded Decimal Interchange Code
Unicode—coding scheme capable of representing all
world’s languages
ASCII Symbol EBCDIC
00110000 0 11110000
00110001 1 11110001
00110010 2 11110010
00110011 3 11110011
22
23. Data Representation
How is a letter converted to binary form and
back? Step 1.
The user presses
the capital letter D
(shift+D key) on
the keyboard.
Step 2.
An electronic signal for the
capital letter D is sent to the
system unit.
Step 3.
The signal for the capital letter D
is converted to its ASCII binary
code (01000100) and is stored in
memory for processing.
Step 4.
After processing, the binary
code for the capital letter D is
converted to an image, and
displayed on the output device.
23
24. Memory
What is memory?
Electronic components that
store instructions, data, and
results
Consists of one or
more chips on
motherboard or
other circuit board
Each byte stored
in unique location
called an address,
similar to seats
on a passenger train
Seat #2B4 Seat #2B3
24
25. Memory
How is memory measured?
Term Abbreviation Approximate Size
Kilobyte KB or K 1 thousand bytes
Megabyte MB 1 million bytes
Gigabyte GB 1 billion bytes
Terabyte TB 1 trillion bytes
By number of bytes available for storage
25
26. Memory
What is random access memory (RAM)?
The more RAM a
computer has, the
faster it responds
Also called
main memory
or primary
storage
Most RAM is
volatile, it is lost
when computer’s
power is
turned off
Memory chips that can be
read from and written
to by processor
26
27. Memory
How do program instructions transfer in and out of
RAM?
Step 1. When you start the computer, certain
operating system files are loaded into RAM from
the hard disk. The operating system displays the
user interface on the screen.
Operating system
instructions
Web browser
instructions
Word processing
program instructions
Operating system
interface
Web browser
window
Word processing
program window
RAM
RAM
Web browser program
instructions are
removed from RAM
Web browser
window no longer is
displayed on
desktop
Step 2. When you start a Web browser, the
program’s instructions are loaded into RAM from
the hard disk. The Web browser window is
displayed on the screen.
Step 3. When you start a word processing
program, the program’s instructions are loaded
into RAM from the hard disk. The word
processing program, along with the Web Browser
and certain operating system instructions are in
RAM. The word processing program window is
displayed on the screen.
Step 4. When you quit a program, such as the
Web browser, its program instructions are
removed from RAM. The Web browser no longer
is displayed on the screen.
27
28. Faster
variations
of DRAM are
SDRAM and
RDRAM
Used for
special
applications
such as
cache
Most
common
type
Faster and
more reliable
than DRAM
chips
Memory
What are two basic types of RAM chips?
Dynamic
RAM
(DRAM)
• Future: Magnetoresistive RAM (MRAM)
Static
RAM
(SRAM)
28
29. Memory
• Where does memory
reside?
Resides on small circuit
board called memory
module
Memory slots on
motherboard hold memory
modules
memory chip memory slot
dual inline memory module
29
30. Memory
How much RAM does an application require?
Software package
typically indicates
RAM requirements
For optimal
performance, you
need more than
minimum specifications
System Requirements
Windows® XP Home Edition/Professional
• Intel Pentium processor at 233MHZ or higher
• AMD K6 (Athlon Duron Family processor at 233MHZ or higher
• 64 MB of RAM
30
31. Memory
How much RAM do you need?
Depends on type of applications you intend to run
on your computer
RAM
Use
128 to 256 MB 256 to 1 GB 1 GB and up
• Home and business
users managing
personal finance
• Using standard
application software
such as word processing
• Using educational
or entertainment
CD-ROMs
• Communicating with
others on the Web
• Users requiring more advanced
multimedia capabilities
• Running number-intensive
accounting, financial, or
spreadsheet programs
• Using voice recognition
• Working with videos, music, and
digital imaging
• Creating Web sites
• Participating in video conferences
• Playing Internet games
• Power users creating
professional Web sites
• Running sophisticated
CAD, 3D design, or
other graphics-intensive
software
31
32. Memory
What is cache?
L1 cache built into processor
L2 cache slower but has larger capacity
L2 advanced transfer cache is faster,
built directly on processor chip
L3 cache is separate from processor
chip on motherboard (L3 is only
on computers that use L2 advanced
transfer cache)
256 KB of L2 for Personal computers
2 MB of L2 for Servers
Helps speed computer processes by storing frequently used
instructions and data
Also called memory cache
32
33. Memory
What is read-only memory (ROM)?
Memory chips that store
permanent data
and instructions
Nonvolatile memory, it is not
lost when computer’s
power is turned off
Three types:
Firmware
Manufactured with
permanently written
data, instructions,
or information
EEPROM
(electrically
erasable programmable
read-only memory)—
Type of PROM
containing microcode
programmer
can erase
PROM
(programmable
read-only
memory)—
Blank ROM
chip onto which
a programmer
can write permanently 33
34. Memory
What is flash memory?
Step 1.
Purchase and download MP3 music tracks
from a Web site. With one end of a special
cable connected to the system unit, connect
the other end into the MP3 player.
Step 2.
Instruct the computer to copy the MP3 music track
to the flash memory chip in the MP3 player.
Step 3.
Plug the headphones into the MP3
player, push a button on the MP3
player, and listen to the music
through the headphones.
MP3 Player
Flash memory chip
Flash memory card
From computer
To headphones
Nonvolatile memory that can be erased electronically and
reprogrammed
Used with PDAs, digital cameras, digital cellular phones, music players,
digital voice recorders, printers, Internet receivers, and pagers
34
35. Memory
What is CMOS?
Uses battery
power to retain
information when
other power is
turned off
Stores date,
time, and
computer’s
startup
information
Complementary
metal-oxide
semiconductor
memory
Used in some
RAM chips, flash
memory chips, and
other types of
memory chips
35
36. Memory
What is access time?
Amount of time it takes processor
to read data from memory
Measured in nanoseconds (ns),
one billionth of a second
It takes 1/10 of a second to blink
your eye; a computer can perform
up to 10 million operations in same amount of
time
Term Speed
Millisecond One-thousandth of a second
Microsecond One-millionth of a second
Nanosecond One-billionth of a second
Picosecond One-trillionth of a second
36
37. Expansion Slots and Adapter Cards
What is an adapter card?
Types of Adapter Cards
Enhances system unit or
provides connections to
external devices called
peripherals
Also called an expansion card
37
39. Expansion Slots and Adapter Cards
What is an expansion slot?
An opening, or socket,
on the motherboard
that can hold an
adapter card
With Plug and Play,
the computer
automatically
configures cards
and other devices
as you install them
39
40. PCMCIA (PC Card)
• Personal Computer Memory Card
International Association
• Found on notebook computers
40
41. Expansion Slots and Adapter Cards
What are PC cards and flash memory cards?
A PC card adds memory, storage,
sound, fax/modem,
communications, and other
capabilities to notebook computers
A flash memory card allows users
to transfer data from mobile
devices to desktop computers
Hot plugging allows you to insert
and remove cards while computer
is running 41
42. Ports and Connectors
What are ports and connectors?
Port connects external devices to system unit
Connector joins cable to peripheral
Available in one of two genders: male and female
42
46. Ports and Connectors
What is a parallel port?
Connects devices that can
transfer more than one bit at
a time, such as a printer
46
47. Third USB
device connects
to second USB
device, and so on
Second USB
device connects
to first USB
device
First USB
device connects
to USB port
on computer
Single USB port can
be used to attach
multiple peripherals
in a daisy chain
PCs typically have
four to eight USB ports
on front or back of
the system unit
Ports and Connectors
What are USB ports?
USB (universal serial bus) port can connect
up to 127 different peripherals together
with a single connector type
47
48. Ports and Connectors
What are special-purpose ports?
FireWire port
MIDI (Musical
Instrument Digital
Interface) port
SCSI (small
computer system
interface) port
IrDA (Infrared Data
Association) port
Bluetooth port
Allow users to attach specialized peripherals (digital video
cameras, color printers, scanners, and disk drives) or
transmit data to wireless devices
48
49. Buses
What is a bus?
Channel that allows devices
inside computer to
communicate with each other
System bus connects processor
and RAM
Bus width determines number
of bits transmitted at one time
Word size is the number of
bits processor can interpret
and execute at a given time
49
50. Buses
What is an expansion bus?
Allows processor to communicate with peripherals
50