Shahriar Prince

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Interview

September 22, 2010

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Today I am going to an interview

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Similarities between Process and Threads

Both have a parent process. Process has a process id same way thread has a thread id. We can create a process within a process same way we can create thread within a thread Both process and thread has priorities. Unlike processes, threads are not independent of one another. Unlike processes, all threads can access every address in the task . Unlike processes, thread are design to assist one other. Note that processes might or might not assist one another because processes may originate from different users. Thread is a light weight process that is the only comparision. Otherwise you cannot compare both. A thread is contained inside a process. Multiple threads can exist within the same process and share resources such as memory, while different processes do not share these resources. A Process is an instance of a computer program, consisting of one or more threads. Each process must have at least one thread running within it, and each thread must be running within a process

Operating System as Resource Manager

WHAT IS OPERATING SYSTEM ? • Operating System is a software, which makes a computer to actually work. • • It is the software that enables all the programs we use. • • The OS organizes and controls the hardware. • • OS acts as an interface between the application programs and the machine hardware. • • Examples: Windows, Linux, Unix and Mac OS, etc. Why Resource Manager ? * When a computer has multiple users, the need for managing and protecting the memory, I/O devices and other devices is even greater. * The primary task of OS is to keep track of who is using which resource, to grant resource requests, to mediate conflicting requests from different programs etc . * Users often need to share not only hardware, but information(File, Database) as well. Which Includes in Resource Manager ? Resource management includes multiplexing resources in 2 ways, they are 1. In Time 2. In Space When Resource is Time Multiplexed * “Who goes ne

Mikrotik Router Tutorial

Mikrotik কি? Mikrotik হল একটি ব্র্যান্ড নাম। এটি একটি লিনাক্স ভিত্তিক Router operating system. এই Router operating system দিয়ে আপনি আপনার নিজের পিসি টিকে Mikrotik Router বানিয়ে নিতে পারেন। আবার বাজারে বিভিন্ন মডেল এর Mikrotik Router Board কিনতে পাওয়া যায়। যেমনঃ RouterBOARD 450, RouterBOARD 450G, RouterBOARD 750GL, RouterBOARD RB 1100AH. Mikrotik Router কি? Mikrotik Router হল একটি Intelligent Router. Mikrotik router দিয়ে সাধারন Router এর সব কাজ করা যায়। কিন্তু এর পাশাপাশি Mikrotik এর বেশ কিছু ফিচার এর কারনে এটা দিয়ে নেটওয়ার্ক Administration এর কাজও করা যায়। Mikrotik Router এর ফিচার সমূহঃ ১। DHCP Server হিসেবে কনফিগার করা যায়। যেভাবে সাধারণ ব্রডব্যান্ড Router কাজ করে। ২। নেটওয়ার্ক এর সব গুলি IP এর Bandwidth Control করা যায়। এমনকি কোন IP ছাড়াই বিভিন্ন সার্ভিস এর Bandwidth control করা যায়। যেমনঃ Mail Bandwidth, Ping bandwidth, Voice Bandwidth ইত্যাদি। ৩। Web proxy হিসেবে কনফিগার করা যায়। Web proxy দিয়ে বিভিন্ন ওয়েব সাইট ব্লক করা যায়। ৪। একাধিক ISP এর ইন্টারনেট connection

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