Embedded System Design - Dec 2015

Electronics & Communication (Semester 7)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) List out the differences between RISC and CISC architecture.(6 marks) 1 (b) Discuss the purpose of a Watch dog timer in an embedded application.(6 marks) 1 (c) Briefly describe the major elements of the embedded system development life cycle.(8 marks) 2 (a) What is meant by the arity of an instruction? Explain the terms one, two, three address instructions.(4 marks) 2 (b) What are the four major categories of execution flow through an embedded program? Briefly describe what each means.(8 marks) 2 (c) Explain RTN model for a microprocessor Data path and memory Interface with neat diagram.(8 marks) 3 (a) Compare SRAM and DRAM.(4 marks) 3 (b) Explain the internal diagram of DRAM and write the timing diagram for read and write operation.(8 marks) 3 (c) Write a short note on memory Hierarchy.(4 marks) 3 (d) Explain associative mapping cache implementation.(4 marks) 4 (a) Briefly explain V cycle model and spiral model.(10 marks) 4 (b) What are Five steps to a successful design?(4 marks) 4 (c) Explain system specifications versus system requirements.(6 marks) 5 (a) Explain Task state diagram.(5 marks) 5 (b) Differentiate between single thread and multi thread process.(5 marks) 5 (c) Explain Task Control Block (TCB)(5 marks) 5 (d) What is a Foreground and Background systems?(5 marks) 6 (a) What is context switching? Describe the sequence of steps that are necessary to handle an occurrence of an interrupt.(6 marks) 6 (b) Explain Three kinds of stack.(6 marks) 6 (c) Describe virtual model and high level model for OS architectures.(8 marks) 7 (a) Explain Andahl's law.(4 marks) 7 (b) Write a 'c' function to determine the sum of the elements in an array and analyze it line by line for its time complexity.(6 marks) 7 (c) Explain Big - O notation.(5 marks) 7 (d) What are the different operations that can be performed on Arrays and linked list and also analyze the time complexity.(5 marks) 8 (a) Explain memory loading with equations and examples.(10 marks) 8 (b) Explain the trade tracks to optimize the code for performance improvement.(10 marks)