SYSTEM SOFTWARE 2006 - B.E CSE

PART A – (10 ´ 2 = 20 marks)

1. What are the different registers used in SIC?

2. What is base relative addressing?

3. What is a symbol t able? How is it useful?

4. How are jump instructions assembled?

5. What is a Boostrap loader?

6. Mention the use of FIXUPP records.

7. How are MACROS defined?

8. What are positional parameters? How do they differ from keyword parameters?

9. Write the tasks accomplished by the document editing process.

10. What do you mean by tracing?

PART B – (5 ´ 16 = 80 marks)

11. (a) Explain in detail the architecture of SIC machine. (16)

Or

(b) (i) With instruction formats, explain the instruction set of SIC/XE. (8)

(ii) Highlight the salient features of SIC/XE machine architecture. (8)

12. (a) (i) Explain the concept of program relocation. (11)

(ii) With syntax, explain the usage of different symbol defining statements in

an Assembler. (5)

(b) (i) What are the different types of expressions supported by an Assembler?

Explain with examples. (8)

(ii) Describe the design of One Pass Assembler. (8)

13. (a) Explain the different machine independent loader features in detail. (16)

Or

(b) (i) With a neat flow diagram, explain the working of Linkage editors. (8)

(ii) Write a note on MSDOS

Linker. (8)

14. (a) (i) Discuss in brief about the different data structures used by a macro

processor.

(ii) What is the need for concatenation of macro parameters? Explain how it

is done. (8)

Or

(b) Write notes on the following:

(i) Conditional macro expression (8)

(ii) Recursive macro expression. (8)

15. (a) With a neat diagram, explain the structure of an editor.

Or

(b) Discuss in detail about the various issues related to an interactive debugging

system. (16)