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Explain Elimination of common sub expression during code optimization
An optimizing transformation is a regulation for rewriting a segment of a program to enhance its execution competence without influencing its meaning. One of the methods is "Common sub expression elimination"
In given expression as "(a+b)-(a+b)/4", in this "common sub-expression" termed to the duplicated "(a+b)". Compilers implementing such technique realize that "(a+b)" won't modify, and as such, only compute its value once.
What are the process states in Unix? As a process implements it changes state according to its circumstances. Unix processes have the following states: Running : The process
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Define EMS The area at location C8000H-DFFFFFH is often free oropen. This area is used for the expanded memory system in a XT or PC system, or for the upper memory system in an
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a. What is the meaning of aliasing? What are its drawbacks? Describe a method to remove aliasing, using post filtering. b. How can you copy a Pixmap from one place to another
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