{"id":944,"date":"2024-12-05T13:01:00","date_gmt":"2024-12-05T13:01:00","guid":{"rendered":"https:\/\/pennstudiostaging.co.uk\/craig-n-dave\/?post_type=product&#038;p=944"},"modified":"2025-02-28T19:47:16","modified_gmt":"2025-02-28T19:47:16","slug":"ocr-gcse-j277-slr-1-2-memory-and-storage-sample","status":"publish","type":"product","link":"https:\/\/pennstudiostaging.co.uk\/craig-n-dave\/product\/ocr-gcse-j277-slr-1-2-memory-and-storage-sample\/","title":{"rendered":"OCR GCSE (J277) SLR 1.2 \u2013 Memory and Storage &#8211; FREE SAMPLE UNIT"},"content":{"rendered":"<p>It includes:<\/p>\n<ul>\n<li>Student Learning Record Workbook (for use by students)<br \/>\nThe workbook answers have been removed from this download.<\/li>\n<li>End of Topic test<br \/>\nThe end of topic test answers have been removed from this download.<\/li>\n<li>Lesson PowerPoint\u2019s for every lesson<\/li>\n<\/ul>\n<p>This topic covers:<\/p>\n<p>1.2.1 Primary storage (Memory)<\/p>\n<ul>\n<li>The need for primary storage<\/li>\n<li>The difference between RAM and ROM<\/li>\n<li>The purpose of ROM in a computer system<\/li>\n<li>The purpose of RAM in a computer system<\/li>\n<li>Virtual memory<\/li>\n<\/ul>\n<p>1.2.2 Secondary storage<\/p>\n<ul>\n<li>The need for secondary storage<\/li>\n<li>Common types of storage<\/li>\n<li>Optical<\/li>\n<li>Magnetic<\/li>\n<li>Solid state<\/li>\n<li>Suitable storage devices and storage media for a given application<\/li>\n<li>The advantages and disadvantages of different storage devices and storage media relating to these characteristics:<\/li>\n<li>Capacity<\/li>\n<li>Speed<\/li>\n<li>Portability<\/li>\n<li>Durability<\/li>\n<li>Reliability<\/li>\n<li>Cost<\/li>\n<\/ul>\n<p>1.2.3 Units<\/p>\n<ul>\n<li>The units of data storage:<\/li>\n<li>Bit<\/li>\n<li>Nibble (4 bits)<\/li>\n<li>Byte (8 bits)<\/li>\n<li>Kilobyte (1,000 bytes or 1 KB)<\/li>\n<li>Megabyte (1,000 KB)<\/li>\n<li>Gigabyte (1,000 MB)<\/li>\n<li>Terabyte (1,000 GB)<\/li>\n<li>Petabyte (1,000 TB)<\/li>\n<li>How data needs to be converted into a binary format to be<br \/>\nprocessed by a computer<\/li>\n<li>Data capacity and calculation of data capacity requirements<\/li>\n<\/ul>\n<p>1.2.4 Data storage<\/p>\n<p>Numbers<\/p>\n<ul>\n<li>How to convert positive denary whole numbers to binary numbers (up to and including 8 bits) and vice versa<\/li>\n<li>How to add two binary integers together (up to and including 8 bits) and explain overflow errors which may occur<\/li>\n<li>How to convert positive denary whole numbers into 2-digit hexadecimal numbers and vice versa<\/li>\n<li>How to convert binary integers to their hexadecimal equivalents and vice versa<\/li>\n<li>Binary shifts<\/li>\n<\/ul>\n<p>Characters<\/p>\n<ul>\n<li>The use of binary codes to represent characters<\/li>\n<li>The term \u2018character set\u2019<\/li>\n<li>The relationship between the number of bits per character in a character set, and the number of characters which can be represented, e.g.:<\/li>\n<li>ASCII<\/li>\n<li>Unicode<\/li>\n<\/ul>\n<p>Images<\/p>\n<ul>\n<li>How an image is represented as a series of pixels, represented in binary<\/li>\n<li>Metadata<\/li>\n<li>The effect of colour depth and resolution on:<\/li>\n<li>The quality of the image<\/li>\n<li>The size of an image file<\/li>\n<\/ul>\n<p>Sound<\/p>\n<ul>\n<li>How sound can be sampled and stored in digital form<\/li>\n<li>The effect of sample rate, duration and bit depth on:<\/li>\n<li>The playback quality<\/li>\n<li>The size of a sound file<\/li>\n<\/ul>\n<p>1.2.5 Compression<\/p>\n<ul>\n<li>The need for compression<\/li>\n<li>Types of compression:<\/li>\n<li>Lossy<\/li>\n<li>Lossless<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>This unit is one of our free samples for you to assess their suitability for teaching and 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