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Explain Terminal Symbols
Terminal symbols are literal strings that are forming the input of a formal grammar and cannot be broken down into smaller units with no losing their literal meaning. In straightforward words, terminal symbols cannot be changed by using the rules of the grammar; i.e. they're the end of the line, or terminal. For instance, if the grammar rules are that x can become xa and x can become ax, after that a is a terminal symbol as it cannot become something else. These are the symbols that can take place as it is in the programme.
Write a note on the usage of semaphores. Semaphore is a synchronization tool and it is a variable having integer values. It is accessed only by two standard atomic operations w
Q. Describe the purpose of the open() and close() operations. Answer: The open() operation notifies the system that the named file is about to become active. The c
Define a program in execution is known as A program in execution is known as a process
What are privileged instructions? Some of the machine instructions that may cause harm to a system are designated as privileged instructions. The hardware permits the privilege
1. What must a kernel provide for an effective user-level thread implementation? 2. With respect to the quantum q in a scheduling algorithm, explain and discuss the impact of the
What are batch systems? Batch systems are quite appropriate for implementing large jobs that need little interaction. The user can submit jobs and return later for the results.
List the task regions in the Spiral model. Customer communication - In this region it is suggested to set up customer communication. Planning - All planning activities
What is a sequential file? A file that is read one record or block or parameter at a time in order, based on a tape model of a file.
What OS''s are available in market as open source?
Process States A total of nine states are acknowledged by the UNIX system. They are like as follow: User running Executing
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