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Year 11 Exam  >  Year 11 Tests  >  Computer for GCSE/IGCSE  >  Test: Data Storage and Compression - Year 11 MCQ

Test: Data Storage and Compression - Year 11 MCQ


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10 Questions MCQ Test Computer for GCSE/IGCSE - Test: Data Storage and Compression

Test: Data Storage and Compression for Year 11 2024 is part of Computer for GCSE/IGCSE preparation. The Test: Data Storage and Compression questions and answers have been prepared according to the Year 11 exam syllabus.The Test: Data Storage and Compression MCQs are made for Year 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Data Storage and Compression below.
Solutions of Test: Data Storage and Compression questions in English are available as part of our Computer for GCSE/IGCSE for Year 11 & Test: Data Storage and Compression solutions in Hindi for Computer for GCSE/IGCSE course. Download more important topics, notes, lectures and mock test series for Year 11 Exam by signing up for free. Attempt Test: Data Storage and Compression | 10 questions in 20 minutes | Mock test for Year 11 preparation | Free important questions MCQ to study Computer for GCSE/IGCSE for Year 11 Exam | Download free PDF with solutions
Test: Data Storage and Compression - Question 1
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How many bits are in a byte?

Detailed Solution for Test: Data Storage and Compression - Question 1
A byte comprises 8 bits, which is the standard unit for measuring data storage.
Test: Data Storage and Compression - Question 2
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What is the file size in bytes of an image with a resolution of 200x150 pixels and a color depth of 8 bits?

Detailed Solution for Test: Data Storage and Compression - Question 2
File size = 200 x 150 x 8 = 240,000 bits; 240,000 bits / 8 = 30,000 bytes.
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Test: Data Storage and Compression - Question 3
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Which compression technique replaces repeated character sequences with a code indicating the character and repetition count?

Detailed Solution for Test: Data Storage and Compression - Question 3
Run-length encoding is a lossless compression method that replaces repeated sequences with a code denoting the character and its repetition count.
Test: Data Storage and Compression - Question 4
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How many bytes are in a kibibyte (KiB)?
Detailed Solution for Test: Data Storage and Compression - Question 4

1 KiB equals 1024 bytes, as it is based on the binary system where 1 KiB = 210 bytes.

Test: Data Storage and Compression - Question 5
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What is the primary purpose of lossy compression?
Detailed Solution for Test: Data Storage and Compression - Question 5
Lossy compression reduces file size by permanently discarding portions of data, which is often acceptable for media files where minor details can be sacrificed.
Test: Data Storage and Compression - Question 6
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Calculate the size of a sound file with a sample rate of 22,050 Hz, 16-bit resolution, and a duration of 60 seconds.
Detailed Solution for Test: Data Storage and Compression - Question 6
File size = 22,050 x 16 x 60 = 21,168,000 bits; 21,168,000 bits / 8 = 2,646,000 bytes; 2,646,000 bytes / 1024 / 1024 ≈ 2.51 MiB.
Test: Data Storage and Compression - Question 7
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Which of the following is not a method used in lossy compression?
Detailed Solution for Test: Data Storage and Compression - Question 7
Huffman encoding is a lossless compression method, whereas downsampling, reducing color depth, and lowering sample rate are used in lossy compression.
Test: Data Storage and Compression - Question 8
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An image uses 5 bits per pixel and has dimensions of 120x90 pixels. What is the approximate file size in kibibytes?
Detailed Solution for Test: Data Storage and Compression - Question 8
File size = 120 x 90 x 5 = 54,000 bits; 54,000 bits / 8 = 6,750 bytes; 6,750 bytes / 1024 ≈ 6.83 KiB.
Test: Data Storage and Compression - Question 9
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Which unit is equivalent to 220 bytes?
Detailed Solution for Test: Data Storage and Compression - Question 9

1 Mebibyte (MiB) equals 220 bytes, which is 1,048,576 bytes.

Test: Data Storage and Compression - Question 10
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What is the role of Huffman encoding in data compression?
Detailed Solution for Test: Data Storage and Compression - Question 10
Huffman encoding is a lossless compression technique that assigns shorter codes to more frequently occurring characters, thereby reducing overall file size.
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