In analyzing the compilation of PL/I program, the term Machi...

MCQ

In analyzing the compilation of PL/I program, the term Machine independent optimization is assosiated with

creation of more optical matrix

recognition of basic elements and creation of uniform symbols

recognization of basic syntactic construction through reductionsc

use of macro-processor to produce more optimal assembly code

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Consider the following intermediate program in three address codep = a - b
q = p * c
p = u * v
q = p + q
Which one of the following corresponds to a static single assignment form of the above code?

p1 = a - b
q1 = p1 * c
p1 = u * c
q1 = p1 + q1

p3 = a - b
q4 = p3 * c
p4 = u * c
q5 = p4 + q4

p1 = a - b
q1 = p2 * c
p3 = u * c
q2 = p4 + q3

p1 = a - b
q1 = p * c
p2 = u * c
q2 = p + q

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MCQ

Which of the following statement is false?

Flow graph is used to represent DAG.

Three address code is the input to the code generator.

The first statement of three address code is always leader of the first basic block.

Transformation of block is needed for code optimization.

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MCQ

Dead code plays no role in any program operation and therefore it can simply be eliminated.

TRUE

FALSE

Can be true or false

Can not say

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MCQ

Which of the following class of statement usually produces no executable code when compiled?

Declaration

Assignment statements

Input and output statements

Structural statements

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Which of the following comment about peep-hole optimization is true?

It is applied to small part of the code and applied repeatedly

It can be used to optimize intermediate code

It can be applied to a portion of the code that is not contiguous

It is applied in symbol table to optimize the memory requirements

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Compiler Design Basics

Non Deterministic Finite Automata

Lexical Analysis

Regular Expressions

Finite Automata

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Semantic Analyser

Run Time Environment

Code Generation

Code Optimization

Parsing

Transformation from NFA to DFA

Cross Compiler

Epsilon Moves

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