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EnglandComputer ScienceQuick questions
1.2 Memory and storage
Quick questions on Binary numbers, binary addition and shifts - OCR GCSE Computer Science J277
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is wrong overflow rule?Show answer
Overflow is a carry out of the most significant bit, meaning the result needs more bits than are available; a result that still fits has not overflowed.
What is q1?Show answer
Convert the denary number 93 to 8-bit binary. [1 mark]
What is q2?Show answer
Add the 4-bit numbers and , and state whether an overflow occurs in 4 bits. [2 marks]
What is q3?Show answer
A number is left-shifted by 2 places. By what value is it multiplied? [1 mark]
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