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26. To recover from an error, the operator precedence parser may
insert symbols onto the stack and onto the input
delete symbols from the stack
delete symbols from the input
all of these
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27. Reduction in strength means
replacing run-time computation by compile time computation
replacing a costly operation by a relatively cheaper one
Both (A) & (B)
removing loop invariant computation
28. Running time of a program depends on
the way the registers and addressing modes are used
the order in which computations are performed
the usage of machine idioms
29. If control signals {a,b,c,d,e,f,g} for some micro instructions and their corresponding MCCS (Maximum Compatibility Classes) are [ad f* g, abd, beg, b deg} then to determine minimal MCC cover, we need to remove
adfg
afd
bcg
bdeg
30. Assume that X and Y are non zero positive integers. What does the following Pascal program segment do? while X Y do if X > Y then X : = X - Y else Y : = Y - X ; write (X);
Computes LCM of two numbers
Divides larger number by the smaller number
Computes GCD of two numbers
None of these
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