Autumn Examinations 2011/12 - Computer Architecture Exam, Exams of Computer Architecture and Organization

Download Autumn Examinations 2011/12 - Computer Architecture Exam and more Exams Computer Architecture and Organization in PDF only on Docsity! CORK INSTITUTE OF TECHNOLOGY INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ Autumn Examinations 2011/12 Module Title: Computer Architecture Module Code: COMH6002 School: Computing Programme Title: Higher Certificate in Science in Computing in Information Technology Support – Year 1 Bachelor of Science in IT Management – Year 1 Bachelor of Science in Computing – Year 1 Bachelor of Science in Software Development – Year 1 Bachelor of Science in Software Development with Computer Networking – Year 1 Bachelor of Science (Honours) in WEB Development – Year 1 Programme Code: KITSU_6_Y1 KITMN_8_Y1 KCOMP_7_Y1 KSDEV_8_Y1 KDNET_8_Y1 KWEBD_8_Y1 External Examiner(s): Ms. Erica Gill Internal Examiner(s): Mr. S. Lankford, Dr. J. Creagh, Mr. D. Long, Mr. J. McInerney Instructions: Answer Question 1 and TWO other questions. Duration: 2 Hours Sitting: Autumn 2012 Requirements for this examination: Answer Question 1 and TWO other questions. Note to Candidates: Please check the Programme Title and the Module Title to ensure that you have received the correct examination paper. If in doubt please contact an Invigilator. Q1. a) What code is generally used to represent characters? Why is this code generally not used to represent integers? (7 marks) b) For what type of applications is BCD used? Convert the following into BCD format: 42710 (7 marks) c) Using truth tables, prove the following theorems of De Morgan: i) yxyx . ii) yxyx ..  (7 marks) d) Using a K-map, derive the minimal Boolean expression for the following truth table: A B C Output 0 0 0 1 0 0 1 0 0 1 0 X 0 1 1 0 1 0 0 1 1 0 1 0 1 1 0 0 1 1 1 0 (7 marks) e) Compare one’s complement with two’s complement as a means of representing integers. Which form is better and why? (6 marks) f) Perform the following arithmetic, using 8 bits and using Two’s complement representation: 8 - 19 (6 marks) [40 marks]