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# quiz6 - valid reasons why a computer's working memory isn't...

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CS 220: Computer Systems II: Architecture and Programming Fall 2009 - Section A0 Quiz #6 - 2009/11/18 Name: ______________________________ ================================================================================ 1: Circle which one (1) of the following is most accurately what a "dangling pointer" is: a) A pointer that does not have a well-defined type. b) A pointer that is not yet set to a valid area of memory. c) A pointer that points to an area of memory that has been deallocated. ================================================================================ 2: Circle which one (1) of the following is the C function used to deallocate memory allocated by the malloc() function: a) dealloc() b) unalloc() c) ralloc() d) free() ================================================================================ 3: Circle which of the following (it could be any number of them) are
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Unformatted text preview: valid reasons why a computer's working memory isn't made entirely of the high-speed SRAM used in the system's memory cache. a) It would be unreliable. b) DRAM is actually faster. c) It would be too expensive. d) It would use too much power. ================================================================================ 4: Circle which one (1) of the following best indicates what the following C code would do in GCC on an 80386-compatible processor: ============================================= __asm__( "addl %2, %0" "addl %2, %1" : "=r" (var1), "=r" (var2) : "r" (var3), "1" (var1), "0" (var2) ); ============================================= a) var1 = var1 + var2 b) var1 = var1 + var3 var2 = var2 + var1 var2 = var2 + var1 c) var1 = var1 + var3 d) var1 = var2 + var3 var2 = var2 + var3 var2 = var1 + var3...
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