Home Class Notes and Others Notes on Computer Science Operating Systems - History of Operating System [Notes]

Baba

A personal blog of Baba Pandey - A self taught SEO Expert

www.babapandey.com

Interesting Sites:

Computer Forensics Degree

New Things in IT

Online MCQ Test on Different Computer Science Subjects

These days I was busy entering questions in MCQ Quiz and publishing them in ICT Trends. Though the process is not yet complete and will never complete as well since it is gradual process of adding more and more question sets and old question papers from different exams. Anyway, following are the Online Tests completed so far.

 

 

Microsoft Word

Currently, follow ing online tests are avail able for Microsoft Word. We will be adding more in future.

  1. ICTTRENDS-MSWORD-01

     

  2. ICTTRENDS-MSWORD-02 

Algorithms and Data Structures

Fol low ing are the tests avail able for Algo rithms and Data Structures.

  1. ICTTRENDS-DSA-01

Computer Operator

Fol low ing are the tests avail able for Com puter Oper a tor Exam Preparation:

  1. Online Test Computer Operator 01
  2. Online Test on Computer Operator Old Question Paper 2059 ( icttrends-cop01 )

 

 
 
Google Books Loses Copyright Infringement
 
A Paris court has ruled that Google (NSDQ: GOOG) is guilty of violating copyrights in a case brought by French publishers against the search giant’s digital books project. Google will have to pay €300,000 ($430,000) in damages and interest to French publisher La Martiniere, the AP reported. The search giant was also ordered to pay €10,000 ($14,330) per day until it takes down portions of the French books from its online database. In a separate European legal proceeding, Google plans to modify the way its Street View photo mapping service operates in Switzerland, following complaints that it did not do enough to protect individuals’ privacy, Reuters reported.
Read more...
 
Microsoft's Bluetooth Keyboard and Numeric Pad

Sept. 9, 2009
Microsoft announced its thinnest keyboard ever — the Bluetooth Mobile Keyboard 6000 — made exclusively for Bluetooth notebook and desktop computers.

Read more...
 

Operating Systems - History of Operating System [Notes] PDF Print E-mail
Class Notes and Others - Notes for Computer Science

  1. Single user (no OS).
  2. Batch, uniprogrammed, run to completion.
    • The OS now must be protected from the user program so that it is capable of starting (and assisting) the next program in the batch).
  3. Multiprogrammed
    • The purpose was to overlap CPU and I/O
    • Multiple batches
      • IBM OS/MFT (Multiprogramming with a Fixed number of Tasks)
        • The (real) memory is partitioned and a batch is assigned to a fixed partition.
        • The memory assigned to a partition does not change
      • IBM OS/MVT (Multiprogramming with a Variable number of Tasks) (then other names)
        • Each job gets just the amount of memory it needs. That is, the partitioning of memory changes as jobs enter and leave
        • MVT is a more ``efficient'' user of resources but is more difficult.
        • When we study memory management, we will see that with varying size partitions questions like compaction and ``holes'' arise.
    • Time sharing
      • This is multiprogramming with rapid switching between jobs (processes). Deciding when to switch and which process to switch to is called scheduling.
      • We will study scheduling when we do processor management
  4. Multiple computers
    • Multiprocessors: Almost from the beginning of the computer age but now are not exotic.
    • Network OS: Make use of the multiple PCs/workstations on a LAN.
    • Distributed OS: A ``seamless'' version of above.
    • Not part of this course (but often in G22.2251).
  5. Real time systems
    • Often in embedded systems
    • Soft vs hard real time. In the latter missing a deadline is a fatal error--sometimes literally.
    • Very important commercially, but not covered much in this course.
Comments (0)
Write comment
Your Contact Details:
Gravatar enabled
Comment:
<strong> <em> <span style="text-decoration:underline;"> <a target=' /> [quote] [code] <img />   
:D:angry::angry-red::evil::idea::love::x:no-comments::ooo::pirate::?::(
:sleep::););)):0
Security
Please input the anti-spam code that you can read in the image.
< Prev   Next >
 

Disclaimer

PS Exam is all about Computer Science and Computer Jobs Exam Preparation, for those who are pursuing Career in Information Technology Field!

 

Our revenue source is advertisements and provide you Free Multiple Choice Questions, Free Quizes, Ebooks and Class Notes, Questions and Answers, Resources to help you prepare better, all for FREE. This site uses Google Adsense and other third party advertisements. The links with double underline are advertisements from Infolinks.

  

Get contents in email instantly

Enter your email address:

 



PS Exam on Facebook

What's Hot!

Main Menu

Who's Online

We have 30 guests online

Sponsored