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Question one Explain the following in relation to virtual machines a) The concept of a virtual machine b) Hierarchical virtual machines c)
Question one
Explain the following in relation to virtual machines
a) The concept of a virtual machine
b) Hierarchical virtual machines
c) Intermediate languages
d) Security issues relating to running codes on alien machines
Question TwoA context-free grammar G has the following production represented in Backus-Naur Form (BNF):< exp > → < exp > + < exp > | < exp > − < exp > |< exp > ∗ < exp > | < exp > / < exp > |( < exp > ) | < number >< number > → < digit > | < digit > < number >< digit > → 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9.Write a leftmost derivation of 5 + 1 – 4 * 8/4 then draw its equivalent parse tree