CS606-Midterm
1 / 50
Typical compilation means programs written in high-level languages to low-level ____________.
2 / 50
Functions of Lexical analyzer are?
3 / 50
_______ of a two-pass compiler is consists of Instruction selection, Register allocation and Instruction scheduling.
4 / 50
Parser takes tokens from scanner and tries to generate______ .
5 / 50
Front-end of a two pass compiler is consists of Scanner.
6 / 50
Left factoring of a grammar is done to save the parser from back tracking.
7 / 50
In multi pass compiler during the first pass it gathers information about __________ .
8 / 50
Optimal registers allocation is an NP-hard problem.
9 / 50
Flex is an automated tool that is used to get the minimized DFA (scanner).
10 / 50
Can a DFA simulate NFA?
11 / 50
Consider the following grammar,
12 / 50
13 / 50
Grammars with LL(1) conflicts can be made LL(1) by applying left-factoring, substitution, and left-recursion removal. Left-factoring takes care of ________conflicts.
14 / 50
Bottom-up parsers handle a ________ class of grammars.
15 / 50
For each language to make LL(1) grammar, we take two steps, 1st is removing left recurrence and 2nd is applying fin sequence.
16 / 50
The transition graph for an NFA that recognizes the language ( a | b)*abb will have following set of states.
17 / 50
In DFA minimization we construct one ______ for each group of states from the initial DFA.
18 / 50
Yacc contains built-in support for handling ambiguous grammars resulting in shift-reduce conflicts. By default these conflicts are solved by performing the ________.
19 / 50
Intermediate Representation (IR) stores the value of its operand in
20 / 50
Recursive ____________ parsing is done for LL(1) grammar.
21 / 50
___________ phase which supports macro substitution and conditional compilation.
22 / 50
Lexical Analyzer generator _______ is written in Java.
23 / 50
In parser the two LL stand(s) for ____________ .
24 / 50
Responsibility of _____ is to produce fast and compact code.
25 / 50
26 / 50
When generating a lexical analyzer from a ________ description, the item sets (states) are constructed by two types of “moves”: character moves and e moves.
27 / 50
Left factoring is enough to make LL1 grammar
28 / 50
29 / 50
NFA is easy to implement as compared to DFA.
30 / 50
Which of the statement is true about Regular Languages?
31 / 50
One of the core tasks of compiler is to generate fast and compact executable code.
32 / 50
Consider the grammar
33 / 50
AST summarizes the grammatical structure with the details of derivations.
34 / 50
In Flex specification file different sections are separated by ________ .
35 / 50
In Back End module of compiler, optimal register allocation uses______ .
36 / 50
A _______ is a top down parser.
37 / 50
In Three-pass compiler ____ is used for code improvement or optimization.
38 / 50
39 / 50
Front end of two pass compiler takes________ as input.
40 / 50
Lexer and scanner are two different phases of compiler
41 / 50
In predictive parsing table the rows are ___________ .
42 / 50
43 / 50
____________avoid hardware stalls and interlocks.
44 / 50
LL(1) parsing is called non-predictive parsing.
45 / 50
LR parsers can handle _______ grammars.
46 / 50
47 / 50
A lexical analyzer generator automatically constructs a _____ that recognizes tokens.
48 / 50
An ----- does not need to examine the entire stack for a handle, the state symbol on the top of the stack contains all the information it needs
49 / 50
50 / 50
Your score is
The average score is 0%
Restart quiz
