Unit 1 Information Technology Topic A

A pixel is...

• A programming language exclusively for drawing squares

• The sound a computer makes when it starts up

• Part of a computer screen that generates heat

• A tiny dot or square in a single colour making up a digital image

Input or output, or storage?

Groups:

(a) Input

,

(b) Output

,

(c) Storage

• SSD
• Monitor
• Touchscreen

• Printer
• USB Flash Drive
• Projector

• Headphones
• Hard Drive
• Mouse
• Webcam
• Barcode scanner

• Plotter
• Keyboard

• Microphone
• Speakers
• External Hard Drive

There are 4 main operating system types that we have looked at. Which are they?

• Real Time

• Task oriented

• Single user, single task

• Single user, multi task

• Multi user

Whilst computers seem to ​ (a)   , the processor can only do ​ (b)   task at a time. The Operating system allocates ​ (c)   and memory to the many tasks that need to be completed.

• multi-task
• one
• processing time
• single-task
• two
• processing power

Match the following user interfaces to a key feature

• Processor and memory hungry

• GUI

• User needs some knowledge in order to us

• Adapted

• Can be amended to suit the user

• Menu

• Instantly completes commands.

• CLI

Automatic data processing means that people do not have to be deployed to ​ (a)   to carry out data collection tasks. Examples could be use in radioactive areas, in space, or deep ​ (b)   measuring tremors and ​ (c)   earthquakes and tsunami

• dangerous areas
• under the ocean
• predicting
• safe zones
• above the clouds
• analyzing weather patterns

What is manual data processing?

• The use of automated software to analyze large datasets

• The process of storing and retrieving data using magnetic tapes

• The use of AI systems to process data in real-time

• Handling and analyzing data by humans without the use of automated tools

Which of the following best describes lossy compression?

• A compression method that reduces file size by permanently removing some data, resulting in reduced quality

• A technique that compresses data without any loss of information or quality

• A method of compression used exclusively for text files

• A reversible compression technique for archival purposes

Fill in the missing word...

________ compression is a method of reducing file size without losing any original data, allowing full recovery of the original file.

In digital imaging, what does resolution refer to?

• The size of the screen displaying the image

• The number of colors a screen can display

• The speed at which a computer processes images

• The amount of detail an image holds, often measured in pixels