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Posted By: Chones prakash Member Level: Silver Posted Date: 01 Jul 2008
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2007 Bangalore University B.C.A System Software Question paper
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IV Sem B.C.A
May/June 2007
System Software
Time:3 Hours
Max. Marks: 80
SECTION - A
1. Answer any eight of the questions (8x3=24)
1.Explain:
a)IR b)LC c)Working registers
2.What is the purpose of following in an assembler ?
a)Pseudo-op table
b)Machine-op table
c)Literal table,
3.What are the tasks performed by a macro instructionprocessor?
4.Explain the compile and Go loading scheme.
5.What are program overlays?
6.What is Dynamic linking? Explain.
7.What is the purpose of storage assignment phase ofcompiler?
8.What is the purpose of interpretation phase of compiler?
9.What is the purpose of the following pseudo-op's in IBM360?
a) USING B) DC c) START
10.Explain analysis phase of assembly process
SECTION - B
Answer arty four questions: (4x16=56)
11 a) What are the major components of system software?
b) What are the types of instruction supported by IBM 360 machine?
12.a) Write brief algorithms for a 2-pass assembler
b) Write a note on data structures used in a 2-pass assembler.
13.a) Explain macro instructions defining macros with an example.
b) Explain the pseudo-ops EXTRN, START and ENTRY with reference to subroutine linkages.
14.a) Explain absolute loader and its design.
b) Explain direct linking loader.
15.a) Explain the databases used by lexical phase of a compiler.
b) Explain the syntax phase with databases used in a compiler.
16. Write short notes on:
a) Machine dependent and machine independent optimization.
b) Macro calls within macros
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