The Binary Number System (AQA A-Level Computer Science): Quizzes

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The Binary Number System
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What is the result of 1+11 + 1 in binary addition?

1010

What is the range of values for an nn-bit two's complement system?

2n1-2^{n-1} to 2n112^{n-1} - 1

In two's complement, what does the MSB indicate?

Sign: 0=positive, 1=negative

How do you convert a positive to negative in two's complement?

Find first 1 from LSB, flip rest

In fixed point binary, what fraction does the first bit after the point represent?

12\frac{1}{2}

What are the two components of a floating point number?

Mantissa and exponent

What must a normalised positive binary floating point number start with?

0101

What is overflow in binary calculations?

Number too large for allocated bits

What is the formula for relative error?

Absolute error / intended value

What is an advantage of fixed point over floating point?

Faster processing speed

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