Introduction to Information Technology · Unit 3 · 4 hrs
Computer Memory
Exam-focused notes for Computer Memory (Introduction to Information Technology, CSC114): what the TU syllabus asks and how it has actually been tested, with 10 solved past questions from this unit.
What this unit covers
- Introduction
- Memory Representation
- Memory Hierarchy
- CPU Registers
- Cache Memory
- Primary Memory
- Secondary Memory
- Access Types of Storage Devices
- Magnetic Tape
- Magnetic Disk
- Optical Disk
- Magneto-Optical Disk
- How the Computer uses its memory
Secondary Memory
Compare primary memory with secondary memory? Why do we need primary memory in computers? Explain different types of secondary memories used in computers.[10]
--- Feature Primary Memory Secondary Memory --------- Also Known As Main memory, Internal memory Auxiliary memory, Storage device Location Inside the computer (directly accessible by CPU) External to CPU (not directly accessible) Speed Very fast (RAM: ~60 n...
Full solved answer →Cache Memory
Write short notes on: a.) Cache Memory b.) IoT [5]
Cache memory is a very high-speed memory placed between the CPU and RAM (main memory) in the memory hierarchy. Feature Details ------ Speed 2 to 10 nanoseconds Size 32 KB to 4 MB Cost Very expensive Type Uses SRAM (Static RAM) Volatility Volatile (data lost...
Full solved answer →What is cache memory? How is it different from register? [5]
Cache memory is a high-speed temporary storage located between the CPU and the main memory (RAM) in the memory hierarchy. Its primary purpose is to reduce the average time required to access data from the main memory by storing frequently used data and inst...
Full solved answer →What is the purpose of cache memory? How sequential access differs from direct access? [5]
Cache memory is a small, high-speed memory placed between the CPU and the main memory (RAM) in the memory hierarchy. 1. Speed Bridging: The CPU operates much faster than RAM (CPU registers: 1-2 ns, RAM: ~60 ns). Cache memory (speed: 2-10 ns) bridges this sp...
Full solved answer →What is the purpose of cache memory? How sequential access differs from direct access? [5]
Cache memory is a small, high-speed memory placed between the CPU and the main memory (RAM) in the memory hierarchy. 1. Bridge the Speed Gap: The CPU operates much faster than RAM (CPU registers: 1-2 ns, RAM: ~60 ns). Cache (2-10 ns) sits between them and r...
Full solved answer →Memory Hierarchy
Explain hierarchy of different memory types along with figure. What are different types of read only memory?[10]
Computer memory is a physical device capable of storing information temporarily or permanently. RAM stores information temporarily while ROM stores information permanently. Memory devices utilize integrated circuits and are used by operating systems, softwa...
Full solved answer →What is computer memory? Describe memory hierarchy with suitable example.[10]
Computer memory is a device or component in a computer system that is used to store data, instructions, and intermediate results for processing. Memory allows the CPU to access and retrieve information quickly during the execution of programs. Memory can be...
Full solved answer →Define memory hierarchy. Explain different types of ROM in detail. [5]
--- Memory hierarchy is the arrangement of different types of computer memory in a layered structure based on their speed, cost, and storage capacity. As we move up the hierarchy, memory becomes faster and more expensive but has smaller capacity. As we move...
Full solved answer →Primary Memory
What is primary memory? Compare primary memory with secondary memory. [5]
Primary memory (also called main memory or internal memory) is the memory that is directly accessible by the CPU and holds the data and instructions that are currently being processed. It is a volatile memory, meaning its contents are lost when the power is...
Full solved answer →Magnetic Tape
How many numbers of bits are equivalent 1 Kilobyte? Discuss the working mechanism of magnetic tape. [5]
- Unit to convert: 1 Kilobyte - Standard relations: 1 Byte = 8 bits, 1 Kilobyte = 1024 Bytes --- Standard unit relations: Unit Relation ---------------- 1 Bit Smallest unit (0 or 1) 1 Byte = 8 bits 1 Kilobyte (KB) = 1024 Bytes Calculation: $$1 \text{ Kiloby...
Full solved answer →Make Unit 3 stick
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