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AMCAT Computer Awareness — practice by topic

Browse 149 questions across 12 Computer Awareness topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Computer Awareness topics

Networking (25)Software (25)Abbreviations (19)Computer Awareness (19)Devices (19)Internet & Email (15)Hardware (13)Memory (13)Security (13)Computer Fundamentals (10)MS Office (10)Emerging Technologies (6)

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The brain of a computer is the:Read the answer and worked solution →Which is the FASTEST memory in computer hierarchy?Read the answer and worked solution →SSD stands for:Read the answer and worked solution →1 KB equals:Read the answer and worked solution →

Worked practice questions

The brain of a computer is the:

  1. RAM
  2. CPU (Central Processing Unit)
  3. Monitor
  4. Hard disk
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Correct answer: B. CPU (Central Processing Unit)

CPU executes instructions, performs calculations, controls all other components. Modern CPUs (Intel, AMD, ARM) have multiple cores, cache memory, and run at GHz frequencies. Sometimes called the 'processor'.

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Which is the FASTEST memory in computer hierarchy?

  1. Hard disk
  2. SSD
  3. CPU cache (L1 < L2 < L3, all faster than RAM)
  4. RAM
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Correct answer: C. CPU cache (L1 < L2 < L3, all faster than RAM)

**Memory hierarchy (fast to slow):** CPU registers → L1 cache → L2 cache → L3 cache → RAM → SSD → HDD. Cache levels are smallest but fastest. L1 typically < 64 KB, latency ~1 ns. RAM latency ~100 ns. HDD ~10 ms (10 million ns).

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SSD stands for:

  1. System Speed Drive
  2. Serial Storage Device
  3. Solid State Drive — flash memory storage, no moving parts
  4. Standard Storage Disk
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Correct answer: C. Solid State Drive — flash memory storage, no moving parts

**SSD:** uses NAND flash memory. Much faster than HDD (no spinning platters, no seek time). **Common SSDs:** SATA, NVMe (PCIe). Read/write speeds 500 MB/s to 7000+ MB/s for NVMe.

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