{"id":233816,"date":"2025-06-13T12:35:49","date_gmt":"2025-06-13T12:35:49","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=233816"},"modified":"2025-06-13T12:35:52","modified_gmt":"2025-06-13T12:35:52","slug":"each-page-size-in-virtual-and-physical-memory-is-512-bytes","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/13\/each-page-size-in-virtual-and-physical-memory-is-512-bytes\/","title":{"rendered":"Each page size in virtual and physical memory is 512 bytes."},"content":{"rendered":"\n

Each page size in virtual and physical memory is 512 bytes. Word size is 2 bytes. Block size is 4 words. Cache memory is direct mapping. Calculate the above required details. \u2022 In detail, explain the Android Framework Architecture and Android Application Architecture.
Texts: Virtual memory size of 64 KBytes. Physical memory size of 8 KBytes. Cache memory of 512 bytes. Each page size in virtual and physical memory is 512 bytes. Word size is 2 bytes. Block size is 4 words. Cache memory is direct mapping. Calculate the above required details. \u2022 In detail, explain the Android Framework Architecture and Android Application Architecture<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Let’s break the question into two major parts<\/strong>:<\/p>\n\n\n\n

    \n
  1. Memory Calculations based on the system architecture<\/strong><\/li>\n\n\n\n
  2. Explanation of Android Framework Architecture and Android Application Architecture<\/strong><\/li>\n<\/ol>\n\n\n\n
    \n\n\n\n

    Part 1: Memory Architecture Calculations<\/strong><\/h2>\n\n\n\n

    Given:<\/strong><\/h3>\n\n\n\n
      \n
    • Virtual Memory Size<\/strong> = 64 KB = 65,536 Bytes<\/li>\n\n\n\n
    • Physical Memory Size<\/strong> = 8 KB = 8,192 Bytes<\/li>\n\n\n\n
    • Cache Size<\/strong> = 512 Bytes<\/li>\n\n\n\n
    • Page Size (Virtual & Physical)<\/strong> = 512 Bytes<\/li>\n\n\n\n
    • Word Size<\/strong> = 2 Bytes<\/li>\n\n\n\n
    • Block Size<\/strong> = 4 Words = 4 \u00d7 2 = 8 Bytes<\/li>\n\n\n\n
    • Cache Mapping<\/strong> = Direct Mapping<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      Calculations:<\/strong><\/h3>\n\n\n\n
        \n
      1. Number of Virtual Pages:<\/strong><\/li>\n<\/ol>\n\n\n\n

        Virtual Memory SizePage Size=65,536512=128 pages\\frac{\\text{Virtual Memory Size}}{\\text{Page Size}} = \\frac{65,536}{512} = 128 \\text{ pages}Page SizeVirtual Memory Size\u200b=51265,536\u200b=128 pages<\/p>\n\n\n\n

          \n
        1. Number of Physical Frames:<\/strong><\/li>\n<\/ol>\n\n\n\n

          Physical Memory SizePage Size=8,192512=16 frames\\frac{\\text{Physical Memory Size}}{\\text{Page Size}} = \\frac{8,192}{512} = 16 \\text{ frames}Page SizePhysical Memory Size\u200b=5128,192\u200b=16 frames<\/p>\n\n\n\n

            \n
          1. Number of Cache Blocks:<\/strong><\/li>\n<\/ol>\n\n\n\n

            Cache SizeBlock Size=5128=64 blocks\\frac{\\text{Cache Size}}{\\text{Block Size}} = \\frac{512}{8} = 64 \\text{ blocks}Block SizeCache Size\u200b=8512\u200b=64 blocks<\/p>\n\n\n\n

              \n
            1. Number of Words per Block:<\/strong>
              Already given = 4 words<\/strong> per block.<\/li>\n\n\n\n
            2. Offset bits (within page):<\/strong>
              Since each page = 512 Bytes:<\/li>\n<\/ol>\n\n\n\n

              log\u20612(512)=9 bits\u21d2Page offset size=9 bits\\log_2(512) = 9 \\text{ bits} \\Rightarrow \\text{Page offset size} = 9 \\text{ bits}log2\u200b(512)=9 bits\u21d2Page offset size=9 bits<\/p>\n\n\n\n

                \n
              1. Virtual Address Size:<\/strong><\/li>\n<\/ol>\n\n\n\n

                log\u20612(65,536)=16 bits\\log_2(65,536) = 16 \\text{ bits}log2\u200b(65,536)=16 bits<\/p>\n\n\n\n

                  \n
                1. Physical Address Size:<\/strong><\/li>\n<\/ol>\n\n\n\n

                  log\u20612(8,192)=13 bits\\log_2(8,192) = 13 \\text{ bits}log2\u200b(8,192)=13 bits<\/p>\n\n\n\n

                    \n
                  1. Cache Index Bits:<\/strong><\/li>\n<\/ol>\n\n\n\n

                    log\u20612(64)=6 bits\\log_2(64) = 6 \\text{ bits}log2\u200b(64)=6 bits<\/p>\n\n\n\n

                    \n\n\n\n

                    Part 2: Android Architecture Explanation<\/strong><\/h2>\n\n\n\n

                    1. Android Framework Architecture<\/strong><\/h3>\n\n\n\n

                    The Android Framework provides a set of APIs that developers use to build apps. It sits above the native libraries and OS layer. Key components include:<\/p>\n\n\n\n

                      \n
                    • Activity Manager<\/strong>: Manages the activity lifecycle.<\/li>\n\n\n\n
                    • Package Manager<\/strong>: Manages app packages.<\/li>\n\n\n\n
                    • Window Manager<\/strong>: Controls access to windows.<\/li>\n\n\n\n
                    • Content Providers<\/strong>: Manage shared app data.<\/li>\n\n\n\n
                    • View System<\/strong>: Used for UI creation.<\/li>\n\n\n\n
                    • Notification Manager<\/strong>: Handles push messages and alerts.<\/li>\n\n\n\n
                    • Resource Manager<\/strong>: Manages resources like strings, layouts, and drawables.<\/li>\n\n\n\n
                    • Telephony Manager<\/strong>: Manages voice calls and network access.<\/li>\n<\/ul>\n\n\n\n

                      This framework ensures all apps have a consistent environment and allows system components to interact with applications seamlessly.<\/p>\n\n\n\n

                      \n\n\n\n

                      2. Android Application Architecture<\/strong><\/h3>\n\n\n\n

                      An Android application is built on the following key components:<\/p>\n\n\n\n

                        \n
                      • Activities<\/strong>: Represent the UI of an application. Each screen is an activity.<\/li>\n\n\n\n
                      • Services<\/strong>: Run background tasks without a user interface.<\/li>\n\n\n\n
                      • Broadcast Receivers<\/strong>: Handle communication from the system or other apps.<\/li>\n\n\n\n
                      • Content Providers<\/strong>: Share data between apps.<\/li>\n<\/ul>\n\n\n\n

                        The architecture follows the Model-View-Controller (MVC)<\/strong> pattern where:<\/p>\n\n\n\n

                          \n
                        • Model<\/strong> is data,<\/li>\n\n\n\n
                        • View<\/strong> is UI (XML),<\/li>\n\n\n\n
                        • Controller<\/strong> is the logic (Java\/Kotlin classes).<\/li>\n<\/ul>\n\n\n\n

                          Applications are defined in the AndroidManifest.xml<\/code> and built into APKs. These components run within the Android Runtime (ART)<\/strong> and interact with the system via the Android Framework APIs.<\/p>\n\n\n\n

                          \n\n\n\n

                          Conclusion:<\/strong>
                          You have a 16-bit virtual address, 13-bit physical address, 64 cache blocks, and a structured Android OS that separates hardware control, app logic, and user interface using the framework and application architecture.<\/p>\n\n\n\n

                          \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

                          Each page size in virtual and physical memory is 512 bytes. Word size is 2 bytes. Block size is 4 words. Cache memory is direct mapping. Calculate the above required details. \u2022 In detail, explain the Android Framework Architecture and Android Application Architecture.Texts: Virtual memory size of 64 KBytes. Physical memory size of 8 KBytes. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-233816","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233816","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=233816"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233816\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=233816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=233816"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=233816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}