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1 markConcept of Information Technology

CSEC Information Technology · 2011 · Paper 2 · Question 2(a)(iii)

Questions on computer arithmetic, representations, and storage capacity.

Using two's complement, find the 8-bit representation of -72.

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Other parts of this question

  1. 2(a)(i)If the ASCII code for the letter 'I' is 1100110, find the ASCII code for the letter 'K'. Show ALL calculations.[3 marks]
  2. 2(a)(ii)Convert the binary number 01011110 to hexadecimal.[1 mark]
  3. 2(b)John has an external hard drive with a capacity of 1 terabyte (TB) and Mary has a USB flash drive with a capacity of 16 gigabytes (GB). Calculate how many…[2 marks]
  4. 2(c)(i)For Flash Memory Card, indicate whether it is a secondary or primary storage media.[1 mark]
  5. 2(c)(ii)For Random Access Memory, indicate whether it is a secondary or primary storage media.[1 mark]
  6. 2(c)(iii)For Programmable Read Only Memory (PROM), indicate whether it is a secondary or primary storage media.[1 mark]

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