Binary to Hexadecimal Conversion exam questions

6 Edexcel GCSE Computer Science (1CP2) exam-style questions on Binary to Hexadecimal Conversion (2.1 Binary), 12 marks in all. Answer them on paper or print them, then open the mark schemes and example answers to see how each is marked.

1Convert2 marks

Binary, denary and hexadecimal patterns represent numbers.

Convert the binary pattern 1100 1010 to hexadecimal.

[2 marks]

Mark scheme

Award one mark for each correct digit in the correct position:

C (1)
A (1)

Answer: CA

Example answers and how they were marked

Full marks2/2

Why: Each nibble is one hexadecimal digit: 1100 = C, 1010 = A: both digits are correct (2).

Some marks1/2

C10

Why: One digit is correct (1), but the second is written as 10 in denary instead of A.

No marks0/2

Why: The digits are the wrong way round, so neither is in the correct position.

2Convert2 marks

Computer systems manipulate bit patterns.

Convert the binary pattern 1000 1010 to hexadecimal.

[2 marks]

Mark scheme

Award one mark for each correct digit in the correct position:

8 (1)
A (1)

Answer: 8A

Example answers and how they were marked

Full marks2/2

Why: Each nibble is one hexadecimal digit: 1000 = 8, 1010 = A: both digits are correct (2).

Some marks1/2

810

Why: One digit is correct (1), but a digit over 9 is written in denary instead of as a letter.

No marks0/2

Why: The digits are the wrong way round, so neither is in the correct position.

3Convert2 marks

Binary patterns can represent numbers.

Convert the binary pattern 1110 0100 to hexadecimal.

[2 marks]

Mark scheme

Award one mark for each correct digit in the correct position:

E (1)
4 (1)

Answer: E4

Example answers and how they were marked

Full marks2/2

Why: Each nibble is one hexadecimal digit: 1110 = E, 0100 = 4: both digits are correct (2).

Some marks1/2

144

Why: One digit is correct (1), but a digit over 9 is written in denary instead of as a letter.

No marks0/2

Why: The digits are the wrong way round, so neither is in the correct position.

4Convert2 marks

Computers manipulate binary patterns.

Convert the binary pattern 1100 1111 to hexadecimal.

[2 marks]

Mark scheme

Award one mark for each correct digit in the correct position:

C (1)
F (1)

Answer: CF

Example answers and how they were marked

Full marks2/2

Why: Each nibble is one hexadecimal digit: 1100 = C, 1111 = F: both digits are correct (2).

Some marks1/2

C15

Why: One digit is correct (1), but the second is written as 15 in denary instead of F.

No marks0/2

Why: The digits are the wrong way round, so neither is in the correct position.

5Convert2 marks

Computer systems manipulate bit patterns.

Convert the binary pattern 1110 1111 to hexadecimal.

[2 marks]

Mark scheme

Award one mark for each correct digit in the correct position:

E (1)
F (1)

Answer: EF

Example answers and how they were marked

Full marks2/2

Why: Each nibble is one hexadecimal digit: 1110 = E, 1111 = F: both digits are correct (2).

Some marks1/2

E15

Why: One digit is correct (1), but the second is written as 15 in denary instead of F.

No marks0/2

Why: The digits are the wrong way round, so neither is in the correct position.

6Convert2 marks

Binary, denary and hexadecimal patterns represent numbers.

Convert the binary pattern 0100 1010 to hexadecimal.

[2 marks]

Mark scheme

Award one mark for each correct digit in the correct position:

4 (1)
A (1)

Answer: 4A

Example answers and how they were marked

Full marks2/2

Why: Each nibble is one hexadecimal digit: 0100 = 4, 1010 = A: both digits are correct (2).

Some marks1/2

410

Why: One digit is correct (1), but a digit over 9 is written in denary instead of as a letter.

No marks0/2

Why: The digits are the wrong way round, so neither is in the correct position.

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