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Edexcel GCSE Computer Science (1CP2) Exam Questions

Build a practice paper from 693 exam-style questions, each with its mark scheme and example answers. Print it, or answer it on paper and then open the mark schemes. Or browse the questions by topic.

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2 questions · 3 marks

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1Multiple choice1 markNetwork Speed Swap Remove

Network speeds are measured in bits per second.

Identify the number of bits in one kilobit.

[1 mark]
  • A8
  • B1000
  • C1024
  • D8000
Mark scheme
  • B 1000 (1)
  • The only correct answer is B. The correct answer is 1000.
  • A is not correct because 8 is the number of bits in one byte, not in one kilobit
  • C is not correct because 1024 is the number of bits in one kibibit, not in one kilobit
  • D is not correct because 8000 is the number of bits in one kilobyte (1000 bytes), not in one kilobit
Example answers and how they were marked
Full marks1/1

B 1000

Why: Correct option: one kilobit is 1000 bits (1).

No marks0/1

C 1024

Why: Near miss: 1024 is the number of bits in a kibibit, not a kilobit, so no mark.

No marks0/1

A 8

Why: Confuses bits with bytes: 8 bits make one byte, not one kilobit.

2Convert2 marksDenary to Binary Conversion Swap Remove

Computers manipulate binary patterns.

Convert the denary number 184 to 8-bit binary.

[2 marks]
Mark scheme

Award one mark for each correct nibble in the correct order:

  • 1011 (1)
  • 1000 (1)

0 marks if the response is not 8-bit binary.

Example answers and how they were marked
Full marks2/2

1011 1000

Why: 184 = 128 + 32 + 16 + 8: both nibbles are correct (2).

Some marks1/2

1011 1001

Why: Converts 185 instead (a slip in adding up the place values). The first nibble is correct (1); the second is not.

No marks0/2

0001 1101

Why: The bits are written in reverse, smallest place value first. Neither nibble is correct.

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