Thapar University 2006 B.E Computer Science Computer System Software - Question Paper

Thapar Institute of Engineering & Technology
B.Tech CS (4th Year)
MidTerm exam
CS012 (Computer System Software)

Thapar Institute of Engineering & Technology, Patiala Computer Science & Engineering Department B.E. (Computer Engineering) 4th Year]^- Semester

Mid Semester Test-2 Course Code : CS 012    Date : 09.12.2006

Course Name : Computer System Software    Time Allowed : 3 Hr.

Instructor : Deepak Garg    Max. Marks : 36

Note: All Questions are compulsory. Attempt the parts of the question at one place. Tables should be

clearly made with proper structure. Check your Answer sheets on 11.12.2006 (Monday) in L204

What you understand by a memory manager in an Operating System. What arc various memory management schemes? Explain any five of them with figures and examples giving all details.

a)What    you understand by code optimization phase of compiler? Explain various techniques of code optimization?

b)    W'hat is a conditional breakpoint in a debugger?

c)    Find the space required for entire page table, given that

the virtual space is 4G bytes (1G = 10^A9 )

each page size is 4k

each page table entry is 4 bytes

d)    Explain the following instruction SVC

TIO

1C

e)    What you understand by absolute loaders. Explain.

f)    What is dynamic linking. Give its pros and cons.

a)What    are linkage conventions using a save area. Discuss the assembly code while calling a function and while returning from a function to link both the modules.

b)    Solve the macro processor part of the EDIT program given at the back and make

(i)    MNT

(ii)    ALA

(iii)    MDT

Also expand the program that will be used for the linker part.

c)    Solve the Linker part and make the RLDJESD for both the programs EDIT & LINK given in the back. The output of these programs is to be combined by using a GEST assuming the program EDIT is starting at memory location 60 in the main memory and the program LINK start immediately after the first program with a double w'ord alignment.__

Make the assembler tables for the output from the linker part after you get a single linked module

a)

(i)	ST
(ii)	LT
(iii)	BT
(iv)	MOT
(V)	POT

b) Convert the program using IBM 370 assembler and write the machine code in the hexadecimal code format. Assume the hex code of everv Instruction to be 1C.

		MACRO
		MACPRO	&ABC.&DEF
		GBLA	&GHI
		AR	&ABC.&DEF
		A	3.JKL
	&GH1	SETA	9
		NC	MNO,PQR
		CR	&ABC.&GHI
		D	&DEF,STU
		MACLINK	5
		LR	8,11
		MEND
		MACRO
		MACLINK	&XYZ
		LCLA	&GHI
		GBLA	&STU
		OR	L&XYZ
	&GHI	SETA	7
	&STU	SETA	8
		SR	&GHL&GHI
		ST
	EDIT	START
		EXTRN	WIFI
		ENTRY	WIN
		BALR	15,0
		USING	M5
	VW	EQU	10
		SL	8,=F12
		CH	I2,=H9
		MACPRO	3.4
		MV1	WIN,9
		LTORG
		DROP	15
		DS	0D
	JKL	DC	5X4C\BM000I000
	MNO	DC	CCOMPUTER
	PQR	DC	D34	-
	WIN	DC	A(WIFI+WIN)*A(W1N-EDIT)
		END
	LINK	START
		EXTRN	EDIT
		ENTRY	WIFI, TFT
	TEN	EQU	10
		SLR	TEN, 10
	TFT	MR	6,TEN
		LCR	4,7
		XR	6,9
		NR	TEN, 11
	WIFI	DC	A(TFT-EDIT-LINK+WIFI),A(EDIT)
		END

Attachment: thapar-university-2006-b-e-computer-science-25965-1.pdf

Earning:   Approval pending.