← Back to Memory
All 9 questions. After you submit, each question shows the right answer and why. Back to the quick check
When a computer is switched off, its working memory (RAM) keeps everything that was in it.
Your photos are still on your tablet the next morning. What kind of part keeps them safe while it is switched off?
1 GiB is 1 073 741 824 bytes and 1 GB is 1 000 000 000 bytes. How many more bytes are in 1 GiB than in 1 GB?
What does it mean to say a memory chip is 'volatile'?
Why does DRAM have to be refreshed over and over?
If every DRAM cell must be refreshed once every 64 ms, how many times is each cell refreshed in one second? Give a whole number (rounded down).
A drive is sold as 500 GB (500 × 10⁹ bytes). Your computer reports sizes in GiB (2³⁰ = 1 073 741 824 bytes). About how many GiB will it report? Give one decimal place.
If main memory already holds a program and its data, why do processors also have caches?
Dennard's DRAM cell replaced a six-transistor MOS memory cell with a one-transistor-plus-capacitor design. State the main advantage and the main operational cost of that choice.
