Tutorial2024Proposed solution included

CSC 205 Introduction to Computer Science Tutorial 2024

CSC 205: Tutorial Sheet, 2023/2024, Semester 1, University of Buea, Dept of Computer Science (Dr. Leke Achankeng): BCD weighted code, Excess-3 code and Gray code conversions; ASCII encoding of two words/phrases under a stated code table; odd-parity error checking (including a discussion of when a parity check can be fooled by an even number of simultaneous bit errors); a 2-D even-parity error-check construction; an 8-bit-word checksum calculation and a worked demonstration of the checksum detecting (or, in one constructed case, failing to detect) a transmission error; and a Caesar-cipher encryption exercise with key 5. N.B.: the source scan's second page duplicates the Part II Exercise I/II content already fully captured in Paper 4 (CSC205 Test 1, 16/11/2023); only this page's unique tutorial content is reproduced as this paper.

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University of Buea

Faculty of Science - FS

Computer Science - CSC

CSC2052024

Introduction to Computer Science

Tutorial · First Semester · Level 200

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5.
A computer is transmitting signals over a digital channel, using odd parity check to detect error. If the signal 101001101 is receive, is the signal in error or not? Is there a possibility that an odd parity check is faulty?
7.
In a data transmission which involves 8 bits of data being handled by the network medium, Peter sends a data of 24 bits as following: 10011010 10110011 11000011. a. Calculate the checksum byte, which will be used for error check. b. If the following bit stream is received: 11011010 10110011 10000011. Demonstrate how the checksum byte is used to detect this error.