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JSPMs

Rajarshi Shahu College of EngineeringTathawde, Pune 33

Department of Information Technology

2011-12 (Sem-II)

End Term Marking Scheme

Class: S.E Date: 08 /02/11

Subject: PA & I Max Marks: 50

Time: 9.00 am to 10.30 am

Instructions:1) Solve questions Q.1 or Q.2, Q.3 or Q.4, and Q.5 or Q.6.2) Draw neat diagrams wherever necessary.

3) Assume suitable data if necessary.

Q.1 a) Difference between segment level protection and pade level protection. [8]

Ans: At least six difference is accepted(each difference carries 6 Mark)

And example carries 2 Marks)

b) Which are the different registers used for paging? Explain. [8]

Ans: What is paging? 2 marksRegister involve in paging? 2 marks

Working of each register? 2 marks

Example 2 Marks.

OR

Q.2 a)80386 is currently executing program from code segment having PL as 2.If it needsto access the code from PL0, is it possible? If yes which are the methods used for the

same? If no justify your answer. [8]

Ans: Structure carries 2marks

Method used 2 marks

Justification of answer 4 marks

b)Write short note on IDT? [8]

Ans: what is IDT 2 marks

Structure of IDT 4 marksExplanations 2 marks.

Q.3 a)Which are the different types of exception in 80386? [8]

Ans: What is exception 2 marks

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Types of exception 2 marks

Explaination 4 marks

b) Write ALP to generate square wave of 2khz using timer 0 of 8051 with crystel

frequency as 12MHz. [10]

Ans: Procedure for square wave generater 4 marksSource codes for square wave generater 6 marks

OR

Q.4 a)Give features of PIC 16F8XX . [8]

Ans: Any 6 to 8 feature are expected with explaination each carries 1 and marks.

b) Explain any 2 operating modes of serial communication of 8051. [10]

ans: oprating modes of 8051 2 marks

modes used in serial communication with example carries 6 marks

Q.5 a) What is difference between RETI and RET. [6]

Ans: Four difference expected each carries 1 and marks .

b) Write instruction for selecting bank 1 of 8051microcontroller. [10]Ans: various instructions used for selecting bank 1 carries 4 marks

Structure carries 4 marks.

Example 2 marks

OR

Q.6 a) what is significance of segment register, global descriptor table and descriptor table

register in conversion of linear address to physical address of protected mode

80386.Explain in detail with format of each. [12]Ans: segment register explanation 2 marksGlobal descriptor table explanation 2 marks

Descriptor table register explanation 2 marks

b) Explain the concept of virtual memory.What is its maximum size and how? [6]Ans: What are virtual memory explanations 3 marks

Maximum size with explanations 3 marks