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Computer Chapter 1 : Topic 1.10
Memory Types and Hierarchy
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In a computer system, memory is arranged in a hierarchy mainly to balance performance, cost, and storage efficiency across different levels. What is the main purpose of this memory hierarchy?
Reasoning: Memory hierarchy organizes memory types to optimize speed, cost, and storage capacity trade-offs.
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Which memory type is the fastest but also the smallest in capacity and most expensive per bit?
Reasoning: Cache memory is extremely fast but very small and costly.
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Which of the following memory types is volatile and loses data when power is turned off?
Reasoning: RAM is volatile memory and loses data without power.
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Which memory type is non-volatile and retains data permanently even when the computer is switched off?
Reasoning: ROM is non-volatile and stores permanent instructions.
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In the memory hierarchy, which memory is closest to the CPU?
Reasoning: Cache is located nearest to the CPU for fastest access.
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Which memory has the largest storage capacity but the slowest access speed?
Reasoning: Hard disks offer large storage but slower access speeds.
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Why is cache memory faster than RAM?
Reasoning: Cache is integrated near CPU and built with high-speed memory technology.
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Which memory type is used temporarily to store data and instructions currently being processed?
Reasoning: RAM stores active data for quick CPU access.
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Which statement correctly describes the relationship between speed and cost in memory hierarchy?
Reasoning: High-speed memory like cache is more expensive per unit.
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Which of the following memory types is located inside the CPU?
Reasoning: Cache memory is built into or very close to the CPU.
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Which memory type has the highest capacity but lowest cost per bit?
Reasoning: Hard disks provide large storage at low cost per bit.
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Which of the following is the correct order of memory speed from fastest to slowest?
Reasoning: Cache is fastest, followed by RAM, then secondary storage.
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Which memory is directly used by the CPU to store instructions currently being executed?
Reasoning: Registers hold immediate instructions and data for CPU processing.
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Which of the following is NOT a characteristic of volatile memory?
Reasoning: BIOS is stored in ROM, which is non-volatile.
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Why is secondary storage cheaper per unit compared to primary memory?
Reasoning: Secondary storage is slower and uses less expensive technology.
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Which memory type acts as a bridge between CPU and RAM to reduce access time?
Reasoning: Cache reduces average memory access time.
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Which memory type is typically measured in gigabytes and used for long-term storage?
Reasoning: Secondary storage is measured in large capacities like GB or TB.
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Which statement best describes memory hierarchy arrangement?
Reasoning: High-speed memory is small and expensive, while slow memory is large and cheap.
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Which memory is used to store firmware instructions permanently?
Reasoning: ROM stores permanent system instructions like BIOS.
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Which factor is NOT used to classify memory in hierarchy?
Reasoning: Screen size is unrelated to memory classification.
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Why is RAM considered faster than secondary storage?
Reasoning: RAM uses fast semiconductor circuits and is directly accessible by CPU.
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Which memory type provides the best balance between speed and capacity for active processing tasks?
Reasoning: RAM offers moderate speed and large capacity suitable for active processing.
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