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Like a normal read, your input should break on the new line character "\n" and also on the up and down arrow keys. You will process the input made by the user when he/she enters new line.
History
Your shell must keep a history of the last 10 commands executed. When the user presses the up key the current input should show the last command executed (as the user typed it). So if the user executed the "ls" command, then pressed the up key, then pressed enter, the ls command should be executed. When the user presses up multiple times, you should replace the input with the next previous command. Until you reach the end of the history list (max of 10). If the user presses up and reaches the end of the list, the next time up is pressed nothing should happen. Conversely when the down arrow is pressed you should cycle through the history in the other direction. So if
the user presses down without pressing up, nothing should happen. That is because you will be at the bottom of the list. After a command is executed it should be added to the list and the index of where the user is in the history should be reset. This functionality should be similar to how the Bash shell works.
What are the blocks of microprocessor based system 1. The Memory and I/O System 2. The DOS Operating System 3. The Microprocessor
Describe architecture of WAP gateway. WAP GATEWAY : It is a very unique product giving semi-automatic redirection of HTML documents to WAP compatible mobile phones. Wir
Give a simple example of dynamic modelling using these notation A simple example using these notation is shown below in Figure:
When a switch capacity is full, calls coming into that switch are said to be . (A) open (B) shorted (C) bloc
Q. Interfacing of keyboards? The keyboard employs a special Input/output port which is similar to a serial port however doesn't explicitly follow the RS-232 serial port standar
Q. What do you mean by Software Poll? In this scheme on occurrence of an interrupt, processor jumps to an interrupt service program or routine whose job is to poll (roll call
Q. What do you mean by Program Counter? Program Counter (PC): It determines the instruction that is to be executed next which means after the execution of an on-going instructi
They are of two types. They are big endian and little endian. Memory is separated into two bank, 1:even bank 2:odd bank.
How does computer started?
The game Connect-4 is played on a board that has seven columns. There are six spaces on each column. The board is initially empty. Two players take turns dropping one piece (black
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