CS 1203 – System Software Question Papers

B.E. / B.Tech. Degree Examination, May / June – 2007 Third Semester
Computer Science and Engineering
CS 1203 – System Software

PART – A (10 X 2 =20 marks)
1. Define upward compatibility in systems.
2. Distinguish between direct addressing and indirect addressing.
3. Consider the following sequence
X WQU Y
Y EQU Z
Z RESW 1
Is a two pass assembler can resolve such a sequence of definition? Justify your answer.
4. What is the data structure used to organize the symbol table and operation code table in a simple assembler Why it is preferred?
5. What are the advantages of dynamic linking?
6. What is the function of pass 2 of a loader?
7. What is the use of DEFTAB (Definition table) NAMTAB (Name table) and ARGTAB (Argument table) in macro processor?
8. What is the purpose of conditional compilation statement in ANSI C preprocessor?
9. What are the tasks performed by document editing process?
10. How the mapping of view buffer to a window is done?

PART –B ( 5 X 16 = 80 marks)
11. (a) (i) Explain the SIC machine architecture.– 8
(ii) Write a sequence of instruction for SIC to set
VAL 1 = VAL 2 + INCR-2
VAL 3 = VAL 4 + INCR-2
Illustrate how the same calculation could be performed of SIC/XE. -8

Or

(b) (i) Explain the SIC/XE machine architecture.– 8
(ii) The variables V1, V2 and V3 are assumed as an array of 100 words each. Write a sequence of instructions for SIC to add together the corresponding elements of V1, V2 and store in V3.– 8

12. (a) (i) Write the algorithm for pass 1 assembler.–10
(ii) Explain program relocation with example– 6

Or

(b) Explain in detail about the machine independent features of assemble.– 16

13. (a) Explain the design of relocating loader with an example.– 16

Or

(b) Write short notes on:
(i) Linkage editor. -8
(ii) Dynamic linking. -8

14. (a) (i) Explain with an example how macro processor allows the invocation of macro with in macro.– 8
(ii) Discuss the macro processing features of ANSI C programming language.– 8

Or

(b) Explain the various machine independent features of Macro processor in detail -16

15. (a) (i) Explain the various types of user interface -8
(ii) Discuss the nature of the user interface for an interactive debugger -8

Or

(b) (i) Explain the structure of a text editor -10
(ii) Explain the important functions of an interactive debugging system -8

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