Download GTU BE/B.Tech 2019 Winter 5th Sem New 2150708 System Programming Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER- V (New) EXAMINATION — WINTER 2019

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Subject Code: 2150708

Subject Name: System Programming

Time: 10:30 AM TO 01:00 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Date: 21/11/2019

Total Marks: 70

Q.1 (a) What are the advantages and disadvantages of procedure oriented language? 03

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(b) Define following terms:- 04

1. System Software
2. Semantic gap
3. Specification gap
4. Execution gap

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(c) Explain the various stages of the life cycle of a source program with a neat diagram. 07

Q.2 (a) Give examples of language processors. 03

(b) Difference between one pass and two pass assembler. 04

(c) Consider the following assembly language program and explain role of OPTAB,SYMTAB,LITTAB,POOLTAB with its contents. 07

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START 300
MOVER AREG, ‘=5’
MOVEM AREG,R1
AGAIN MOVER AREG,R1
MOVER CREG,R2
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ADD CREG,=’I”
BC ANY,TERM
LTORG
=5
=1
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TERM SUB AREG,=1"
BC LT,DOWN
LAST STOP
ORIGIN LOOP+2
MULT CREG,R2
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ORIGIN LAST+1
R1 DS 1
DOWN EQU LOOP
R2 DS 1
END 

OR

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(c) List out various assembler directives. Explain any three in detail. 07

Q.3 (a) Write definition of :- 03

1. Macro expansion
2. Lexical expansion

(b) Illustrate expansion of nested macro calls by giving example. 04

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(c) Explain macro expansion in detail. 07

OR

Q.3 (a) Draw figure of macro preprocessor. 03

(b) Explain positional parameters, keyword parameters and default value parameters for macro. 04

(c) What are advanced macro programming facilitates? Explain with example. 07

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Q.4 (a) What is backtracking? 03

(b) Difference between Top Down parser and Bottom Up parser. 04

(c) What is program relocation? How relocation is performed by linker. Explain with example. 07

OR

Q.4 (a) Explain lexical analysis of language processor. 03

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(b) List and explain various types of grammar. 04

(c) What is overlay? Explain the execution of an overlay structured program. 07

Q.5 (a) Why translators are needed? 03

(b) Write example of recursive macros. 04

(c) Consider the grammar E > E—E 07

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E>E*E

E->id

Perform Shift-Reduce parsing of the input string “id1-id2*id3”

OR

Q.5 (a) What is analysis and synthesis part of compilation? 03

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(b) Describe ambiguity in grammar specification. 04

(c) Define simple phrase and handle. Using handle and simple phrase trace the bottom up parsing algorithm. 07

Grammar is: E>T+E|T-E|T

T>T*V|T/V|V

V->a|b|c|d

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String is: a—b*c+d