Add the binary numbers 01101101 and 00110110. Give your answer in binary.
From Paper 2: Computing concepts
1.62 marks
Apply a left binary shift of 2 places to 00010110 and state the effect.
From Paper 2: Computing concepts
1.72 marks
Explain why hexadecimal is often used instead of binary by programmers.
From Paper 2: Computing concepts
2.11 mark
The ASCII code for 'A' is 65. State the ASCII code for 'D'.
From Paper 2: Computing concepts
2.22 marks
Explain one advantage of Unicode over ASCII.
From Paper 2: Computing concepts
3.13 marks
An image is 800 pixels wide and 600 pixels high with a colour depth of 24 bits. Calculate the file size in bytes. Show your working.
From Paper 2: Computing concepts
3.22 marks
Explain the effect of increasing the colour depth of an image.
From Paper 2: Computing concepts
4.11 mark
Define 'sample resolution'.
From Paper 2: Computing concepts
4.23 marks
A 60-second mono sound is sampled at 44,100 Hz with a sample resolution of 16 bits. Calculate the file size in bytes.
From Paper 2: Computing concepts
5.12 marks
Show the run length encoding (RLE) of AAAABBBCCD.
From Paper 2: Computing concepts
5.22 marks
Explain how Huffman coding reduces file size.
Score 0 / 26 · 0 of 15 marked
This paper is written by Plasmo in the style of the AQA GCSE Computer Science exam. It is not a past paper and is not produced or endorsed by the exam board.
Fundamentals of data representation Exam Questions: AQA GCSE Computer Science | Plasmo