STUPIDSID
1(a)
Distinguish between system software and application software.
4 M
1(b)
Explain SIC/XE architecture.
6 M
1(c)
Wirte a SIC/XE program to copy array A of 100 words to array B of same size.
6 M
1(d)
What is upward compatible? How is it ensured between SIC and SIC/XE?
4 M
2(a)
Explain briefly the SIC assembler directives with examples.
6 M
2(b)
What a relocation? Illustrate how a modification record is used in relocation of program.
4 M
2(c)
Generate the machine codes for the following SIC/XE program.
| copy | START | 1000 |
| CLOOP | +JSUB | RDREC |
| LDA | LENGTH | |
| COMP | ZERO | |
| JEQ | EXIT | |
| J | CLOOR | |
| EXIT | STA | BUFFER |
| LDA | THREE | |
| STA | TOTAL-LENGTH | |
| RSUB | ||
| BUFFER | RESW | 100 |
| EOF | BYTE | C'EOF' |
| ZERO | WORD | 0 |
| THREE | WORD | 3 |
| LENGTH | RESW | 1 |
| TOTAL-LENGTH | RESW | 1 |
| RDRES | LDX | ZERO |
MNEMONICS:
JSUB = A0, LDA = 80, LDX = 60,STA = 50,
COMP = 90, RSUB = 4C, JEQ = B0, J = B8
10 M
3(a)
What is a literal? Differentiate literals form immediate data.
4 M
3(b)
Explain the following machine independent features of SIC assembler.
i) Symbol defining statements
ii) Control sections
i) Symbol defining statements
ii) Control sections
8 M
3(c)
Explain the two design options of one-pass assembler.
8 M
4(a)
Write the algorithm of absolute loader.
4 M
4(b)
Write the algorithm of linking loader.
10 M
4(c)
Explain briefly the design options of loaders.
6 M
5(a)
List the basic tasks of a text editor.
4 M
5(b)
With a neat diagram, explain the text editor structure.
6 M
5(c)
List the user interfaces for editors with an example for each.
4 M
5(d)
What are the debugging functions and capabilities?
6 M
6(a)
Give the feature of MACROPROCESSORS and explain the data structures use in macro processors.
8 M
6(b)
Explain any two facilities provided for implementing interacting process in programming language and operating system.
4 M
6(c)
For the following macro definition,expand the macro call statements called in sequence:
i) RDBUFF F1, BUFA, RLEN,04 1024
ii) RDBUFF F2, BUFB, RLNG,
RDBUFF MACRO & INDEV, &BUFADE, &RECLTH, &EOR, &MAXLTH
IF (&EORNE ' ')
i) RDBUFF F1, BUFA, RLEN,04 1024
ii) RDBUFF F2, BUFB, RLNG,
RDBUFF MACRO & INDEV, &BUFADE, &RECLTH, &EOR, &MAXLTH
IF (&EORNE ' ')
| &EORCR | SET | 1 |
| ENDIF | ||
| CLEAR | X | |
| CLEAR | A | |
| IF | (&EORCR EQ1) | |
| LDCH | =X '&EOR' | |
| RMO | A,S | |
| ENDIF | ||
| IF | (&MAXLTH EQ ' ') | |
| +LDT | #4096 | |
| ELSE | ||
| +LDT | =#MAXLTH | |
| ENDIF | ||
| $LOOP | TD | =X '&INDEV' |
| JEQ | $LOOP | |
| RD | =X '&INDEV' | |
| STCH | &BUFADR, X | |
| TIXR | T | |
| JLT | $LOOP | |
| STX | &RECLTH | |
| MEND |
8 M
7(a)
List any ten regular expression in lex.
10 M
7(b)
Distinguish between LEXER and Handwritten lexer.
4 M
7(C)
Write lex program to compute word, character and line count in a given file.
6 M
8(a)
Explain the format of yacc program.
4 M
8(b)
Write lex-yacc program to validate simple arithmetic expression.
8 M
8(c)
Explain briefly lex and yacc interaction.
4 M
8(d)
Discuss conflicts in yacc
4 M
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