A digital audio processor represents signal amplitudes using 8-bit binary patterns.
To amplify a signal, the processor applies a logical shift left by 2 to the 8-bit binary pattern 0011 1101. Determine the resulting 8-bit binary pattern.
To attenuate a signed signal, the processor applies an arithmetic shift right by 2 to the 8-bit binary pattern 1100 1010. Determine the resulting 8-bit binary pattern.
117 exam-style questions on Edexcel GCSE Computer Science Binary, covering Binary representation and number of states, Unsigned and two's complement integers, Converting denary and 8-bit binary, Binary addition and binary shifts, Concept of overflow, and Hexadecimal notation and conversion. Each one has a worked solution and a mark scheme showing where the marks go.