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Bootstrap loader:
The critical programs are loaded into memory by the bootstrap loader at start-up time and will remain resident as long as the computer is running. The bootstrap for most modern computers is stored in read-only memory; on some computers, part of the resident operating system will also be contained in ROM, so that it is permanently resident in memory and always available for use. The memory resident components of an operating system are commonly known as the kernel of the operating system. For example, the operating system program accepts user commands must always be present, as well as the programmes that handle request from the user systems and manage resources in a multitasking system. On the other hand, an operating system command that formats a new disk is only used occasionally; it can be loaded and executed only when it is required. Today, the trend is towards design of nano kernel or micro kernel. The essence of these kernels is to keep the basic kernel smaller.
Time Sharing System: With the use multiprogramming, the batch processing can be quite efficient. However, for many jobs, it is desirable to provide a mode in which the user i
Why is it called out of band protocol? A1) FTP uses port 20 and port 21; port 20 is used for data connection, whereas port 21 is used for control connection. FTP is known as out-of
#queA register is a memory location surrounded by the CPU itself, designed to be rapidly accessed for purposes of fast data retrieval. Processors normally hold a register array, wh
TYPES OF PC: In general, basic function of all the computers is same i.e. Computers accept data as input, perform operations on these data and generates the desired output t
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SYSTEMS SOFTWARE Systems Software generally is the software which control the computers and other peripherals. Ex: MS DOS, Windows 95, Unix, NetWare and Windows NT et
how do you let kids learn on it
Input and Output device: After having understood the characteristics relating to CPU and storage media, let us try to learn about I/O aspects of a computer system. Input /outp
Medical Counter/Shop The Software for medical counter/shop should maintain: Complete customer Details Inventory Control Billing Linked to Accounts Have c
Write a shell script, change-lines, which will substitute a string for a replacement string for each occurance of the string in files specified. The original file will be saved,
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