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CAT Grade 11 Term 1 Week 2 TG

ysxtjmetydg

Course

Computer Science (CSC1B)

103 Documents

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University of Johannesburg

Academic year: 2016/2017

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REMOTE LEARNING EXERCISES/WORKSHEETS/ACTIVITIES

EXERCISES AND MEMORANDA

TEACHER GUIDE

SUBJECT: CAT

GRADE: 11

TOPIC/S:

System Technology: Hardware

Week: 2

1 B

1 C

1 D

2 Monthly duty cycle 2 DSLR 2 LCD or LED 2 DPI 2 1920 x 1440 etc 2 802. 3 False – HDMI / Display Port 3 TRUE 4 Resolution = 1280 x 800 Measured in pixels 4 MP 4 Yes – it has 4G, WiFi, card reader 5 ATM can only perform a limited number of tasks (all related to banking) / cannot use software to perform a wide variety of different types of tasks / only performs tasks it was designed or programmed to do 6 DPI / dots per inch 6 Large file size (of the resulting image)

6 Number of bits that make up one colour in a pixel 6 They generally take up less space than colour images, i. smaller file size 6 Don’t need a separate power adapter / power point / additional (power) cable 6 Any ONE advantage of:  Improve performance / stability  Enable scanner to be used under other (later) operating systems 6 Any ONE limitation of:  Scanning can be slow  Quality of digital image depends largely on quality of original hard copy 6 Measuring / scanning unique biological features of a person Any ONE example of:  Access control in buildings  Fingerprint scanners in laptops  Facial recognition in smartphones, etc. 7 Response time 7 Relationship or ratio between width and height of the screen 7 HDMI / Display Port 8 Any ONE advantage of:  uses less ink/toner – therefore cheaper  promotes green computing  prints faster 9 Any ONE reason of:  Interactive whiteboard can be used as an input device to follow links etc. on the intranet – not just as a passive display  Annotations made on the interactive whiteboard in the course of the demonstration (e. suggestions to improve the intranet) can be saved to the computer for future use 10 Lumens 11 Any ONE green computing practice of:  Switch off equipment while not being used  Use power settings to ensure that power is conserved (e. ‘sleep’, ‘hibernate’ modes)

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