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GenEd Science and Technology — LET Practice Questions

This GenEd Science and Technology section of the LET General Education exam covers 6 expert-reviewed practice questions. Each question has a plain-English explanation and notes on why the wrong answers are wrong.

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Sample questions with answers and explanations

Sample 1

In the TPACK framework for ICT integration, what does the 'P' stand for?

Answer: C

TPACK is a framework by Mishra and Koehler (2006) describing what teachers need to integrate technology effectively. It has three overlapping circles: Technology Knowledge (knowing the tools), Pedagogical Knowledge (knowing how to teach — strategies, learner needs, assessment), and Content Knowledge (knowing your subject deeply). The 'P' stands for Pedagogy. Strong TPACK teachers don't just know each circle separately — they know how to use a particular tech tool for a particular topic with particular students.

Why the other choices are wrong
  • A. 'Practical' isn't the standard meaning of P in TPACK; the framework specifies Pedagogy.
  • B. 'Professional' isn't the formal term Mishra and Koehler used.
  • D. 'Programmatic' isn't the framework component.

Sample 2

Which of the following is considered 'volatile' memory because its contents are lost when the power is turned off?

Answer: C

RAM (Random Access Memory) is called volatile because the data inside vanishes the moment power is cut. The reason: RAM stores data as electrical charges in tiny capacitors, and those charges leak away without continuous refresh (which only happens when the computer is on). That's why work has to be SAVED to a hard drive or SSD — those use magnetism or non-volatile flash memory, and they keep the data even when power's off.

Why the other choices are wrong
  • A. ROM (Read-Only Memory) keeps its contents without power — it's non-volatile.
  • B. Flash drives are non-volatile; the data stays after the drive is unplugged.
  • D. Hard drives store data magnetically and keep it without power — non-volatile.

Sample 3

Which part of the computer is considered the 'brain' where most data processing takes place?

Answer: C

The Central Processing Unit (CPU) is called the brain of the computer because it carries out the instructions that make programs run — calculations, comparisons, data movement. Other parts support the CPU: RAM holds data temporarily for the CPU to use, the hard drive stores files long-term, and the motherboard connects everything. But the actual processing — the thinking — happens in the CPU.

Why the other choices are wrong
  • A. The hard drive is permanent storage; it holds files but doesn't process them.
  • B. RAM is fast working memory that holds data for the CPU; it doesn't compute on its own.
  • D. The motherboard is the connecting circuit board — important, but it doesn't do the processing itself.
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