COMPTIA A+ Practice Exam

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Ace your COMPTIA A+ certification with our practice exam. Engage with a variety of questions including multiple choice and performance-based, complete with hints and detailed explanations. Prepare effectively and boost your confidence for the big day!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the maximum bus speed of DDR2-1066?

400MHz
533MHz
667MHz
800MHz

The correct answer is: 533MHz

DDR2-1066 refers to Double Data Rate 2 memory with a maximum transfer rate of 1066 MT/s (mega-transfers per second). MT/s is different from MHz (megahertz), which is the clock speed of the bus. In DDR2-1066, data is transferred twice in one clock cycle, resulting in a MT/s rate that is twice the clock speed (1066 MT/s = 533 MHz). Therefore, option A (400MHz) and D (800MHz) are incorrect as they are only half of the correct MT/s speed. Option C (667MHz) is closer, but still not the correct answer.