Systems Starter quiz

How does the computer store negative numbers?

• Twos Negative

• Twos Insult

• Twos Compliment

• Twos Inverted

Answer explanation

You didn't really think it was two's insult did you?

Binary is a base ..... system

What numbered base system does Decimal use?

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Convert the following Two's Compliment Number into Decimal:

11010000

What range of positive and negative numbers can be used to store 8 bits?

• -127 to 128

• -128 to 127

• -256 to 255

• -255 to 256

Answer explanation

Remember the formula for calculating range is -(2^8-1) to 2^(8-1) -1

Write the following binary number using floating‑point representation.

−111 0000 1111.0101

There are 16 bits for the mantissa (including the sign bit) and 8 bits for the exponent.

Answer explanation

Remember, if there's a negative before the decimal then the sign bit is negative!

Increasing the size of the mantissa affects the....

Increasing the size of the exponent affects the....

• range

• accuracy

• size of the number

• size of your brain

Which meme describes how confident you feel about Computer Systems so far?

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