21. The expansion of nested macro calls follows
a. FIFO rule
b. LIFO rule
c. LILO rule
d. priority rule
Answer: (b).LIFO rule

22. The fourth Generation computer was made up of ?
a. Transistor
b. Vacuum tubes
c. Chips
d. Microprocessor chips
Answer: (d).Microprocessor chips

23. In a syntax directed translation scheme,if values of an attribute of a node is a function of the
attributes of its children,then attribute is called
a. canonical attribute
b. synthesized attribute
c. inherited attribute
d. none of these
Answer: (b).synthesized attribute

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