Lesson 4.5.4.3
4.5.4.3 Signed binary using two's complement Quiz: AQA Computer Science, Unit 5
20 questions
In partnership with Revision Ninja
Lesson 4.5.4.3, Signed binary using two's complement: 20 multiple choice questions for the AQA Computer Science (7517), Unit 5: Fundamentals of data representation, written with Revision Ninja.
Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.
The 20 questions
-
In a two's complement binary number, what does the most significant bit represent?
- Overflow flag
- Parity bit
- Sign of number
- Exponent value
-
What is the range of an n-bit two's complement integer?
- 0 to 2^n - 1
- -2^(n-1) to 2^(n-1) - 1
- -2^n to 2^n - 1
- -(2^(n-1) - 1) to 2^(n-1)
-
Which 4-bit two's complement pattern represents -8?
- 1111
- 1000
- 0111
- 0000
-
What is the 8-bit two's complement representation of -1?
- 1000 0001
- 1111 1111
- 1000 0000
- 0000 0001
-
Which n-bit two's complement value is the most negative?
- -(2^n - 1)
- -2^(n-1)
- 0
- -1
-
What step is taken after inverting bits to find a number's two's complement?
- Add 1
- Subtract 1
- Shift left 1
- Multiply by 2
-
Which 8-bit two's complement pattern represents +5?
- 0000 1010
- 1111 1011
- 0000 0101
- 1000 0101
-
Convert -5 to 8-bit two's complement.
- 0000 0101
- 1111 1011
- 1111 1010
- 1000 0101
-
Convert the 8-bit two's complement pattern 1111 0110 to decimal.
- 246
- -10
- -6
- -9
-
Convert -6 to 4-bit two's complement.
- 0110
- 1001
- 0101
- 1010
-
Using 4-bit two's complement, calculate 7 - 3. What is the result?
- 1010, which is -6
- 1100, which is -4
- 0100, which is 4
- 0011, which is 3
-
Calculate 20 - 7 in 8-bit two's complement. What pattern results?
- 1111 0011
- 0000 1110
- 0000 1101
- 0001 1101
-
Add the 4-bit two's complement numbers 0011 and 0011. What is the result?
- 0111, which is 7
- 0010, which is 2
- 0110, which is 6
- 1000, which is -8
-
What occurs when adding 1001 (-7) and 1001 (-7) in 4-bit two's complement?
- Overflow
- Precision loss
- No error
- Underflow
-
Convert the 8-bit two's complement pattern 1000 0000 to decimal.
- 0
- -128
- 128
- -127
-
What is the maximum positive integer representable in 8-bit two's complement?
- 256
- 128
- 127
- 255
-
What binary value results from incrementing 011111 (31) by 1 in 6-bit two's complement?
- 000000
- 011110
- 100000
- 111111
-
How many distinct negative integers can a 4-bit two's complement number represent?
- 7
- 15
- 4
- 8
-
How is binary subtraction A minus B performed using a standard adder circuit?
- (-A) minus B
- A times (-B)
- A plus (-B)
- A divided by B
-
What is the 4-bit two's complement result of calculating 5 minus 3?
- 0010
- 0101
- 1101
- 1000
Related quizzes
- Natural, rational, irrational and real numbers Quiz · 4.5.1.1 · 20 questions
- Ordinal numbers, counting and measurement Quiz · 4.5.1.6 · 20 questions
- Number bases Quiz · 4.5.2.1 · 20 questions
- Bits and bytes Quiz · 4.5.3.1 · 20 questions
- Unsigned binary Quiz · 4.5.4.1 · 20 questions
- Unsigned binary arithmetic Quiz · 4.5.4.2 · 20 questions
- Numbers with a fractional part Quiz · 4.5.4.4 · 20 questions
- Rounding errors Quiz · 4.5.4.5 · 20 questions
- Range, precision and normalisation of floating point Quiz · 4.5.4.7 · 20 questions
- Underflow and overflow Quiz · 4.5.4.9 · 20 questions