From 8fb3596668d73582a9b07d2ec8443c837c73c5fd Mon Sep 17 00:00:00 2001 From: Emilianouz <135679131+Emilianouz@users.noreply.github.com> Date: Tue, 11 Nov 2025 11:56:34 +0000 Subject: [PATCH 1/7] Numeric Systems: answers --- number-systems/README.md | 41 ++++++++++++++++++++-------------------- 1 file changed, 21 insertions(+), 20 deletions(-) diff --git a/number-systems/README.md b/number-systems/README.md index 77a3bde94..322d053c6 100644 --- a/number-systems/README.md +++ b/number-systems/README.md @@ -5,61 +5,62 @@ Do not convert any binary numbers to decimal when solving a question unless the The goal of these exercises is for you to gain an intuition for binary numbers. Using tools to solve the problems defeats the point. Convert the decimal number 14 to binary. -Answer: +Answer: 1110 Convert the binary number 101101 to decimal: -Answer: +Answer: 45 Which is larger: 1000 or 0111? -Answer: +Answer: 1000 Which is larger: 00100 or 01011? -Answer: +Answer: 01011 What is 10101 + 01010? -Answer: +Answer: 11111 What is 10001 + 10001? -Answer: +Answer:100010 What's the largest number you can store with 4 bits, if you want to be able to represent the number 0? -Answer: +Answer: 1111 = 15 (largest representable number) + Number of possible values including 0 = 16 How many bits would you need in order to store the numbers between 0 and 255 inclusive? -Answer: +Answer: 8 bits How many bits would you need in order to store the numbers between 0 and 3 inclusive? -Answer: +Answer: 2 bits => 00, 01, 10, 11 How many bits would you need in order to store the numbers between 0 and 1000 inclusive? -Answer: +Answer: 10 bits How can you test if a binary number is a power of two (e.g. 1, 2, 4, 8, 16, ...)? -Answer: +Answer: Been a binary it would be 1 followed by 0s => 100, 10000, 10 Convert the decimal number 14 to hex. -Answer: +Answer:0xE Convert the decimal number 386 to hex. -Answer: +Answer: 0x182 Convert the hex number 386 to decimal. -Answer: +Answer: 902 Convert the hex number B to decimal. -Answer: +Answer:11 If reading the byte 0x21 as a number, what decimal number would it mean? -Answer: +Answer:33 If reading the byte 0x21 as an ASCII character, what character would it mean? -Answer: +Answer:! If reading the byte 0x21 as a greyscale colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? -Answer: +Answer: Dark Grey If reading the bytes 0xAA00FF as an RGB colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? -Answer: +Answer:Purple (magenta) If reading the bytes 0xAA00FF as a sequence of three one-byte decimal numbers, what decimal numbers would they be? -Answer: +Answer: 170 0 255 From 2bd81fef5ee19ce7638d03d78229836a0a791773 Mon Sep 17 00:00:00 2001 From: Emilianouz <135679131+Emilianouz@users.noreply.github.com> Date: Mon, 17 Nov 2025 22:55:33 +0000 Subject: [PATCH 2/7] JSON processing using jq to handle person and scores. --- jq/script-01.sh | 1 + jq/script-02.sh | 1 + jq/script-03.sh | 1 + jq/script-04.sh | 1 + jq/script-05.sh | 1 + jq/script-06.sh | 1 + jq/script-07.sh | 1 + jq/script-08.sh | 1 + jq/script-09.sh | 1 + jq/script-10.sh | 1 + jq/script-11.sh | 1 + 11 files changed, 11 insertions(+) diff --git a/jq/script-01.sh b/jq/script-01.sh index 95827f688..d7399cdb1 100755 --- a/jq/script-01.sh +++ b/jq/script-01.sh @@ -5,3 +5,4 @@ set -euo pipefail # The input for this script is the person.json file. # TODO: Write a command to output the name of the person. # Your output should be exactly the string "Selma", but should not contain any quote characters. +jq .name person.json \ No newline at end of file diff --git a/jq/script-02.sh b/jq/script-02.sh index 21544d67b..823a9e977 100755 --- a/jq/script-02.sh +++ b/jq/script-02.sh @@ -5,3 +5,4 @@ set -euo pipefail # The input for this script is the person.json file. # TODO: Write a command to output the address of the person, all on one line, with a comma between each line. # Your output should be exactly the string "35 Fashion Street, London, E1 6PX", but should not contain any quote characters. +jq '.address | join(", ")' person.json \ No newline at end of file diff --git a/jq/script-03.sh b/jq/script-03.sh index 3566f03ba..a26ab1734 100755 --- a/jq/script-03.sh +++ b/jq/script-03.sh @@ -5,3 +5,4 @@ set -euo pipefail # The input for this script is the person.json file. # TODO: Write a command to output the name of the person, then a comma, then their profession. # Your output should be exactly the string "Selma, Software Engineer", but should not contain any quote characters. +jq -r '[.name, .profession] | join(", ")' person.json \ No newline at end of file diff --git a/jq/script-04.sh b/jq/script-04.sh index 015997e18..7fb3777d1 100755 --- a/jq/script-04.sh +++ b/jq/script-04.sh @@ -6,3 +6,4 @@ set -euo pipefail # TODO: Write a command to output just the names of each player, one per line. # Your output should contain 6 lines, each with just one word on it. # Your output should not contain any quote characters. +jq -r '.[].name' scores.json \ No newline at end of file diff --git a/jq/script-05.sh b/jq/script-05.sh index 993fc9ee3..02f0a2bcc 100755 --- a/jq/script-05.sh +++ b/jq/script-05.sh @@ -5,3 +5,4 @@ set -euo pipefail # The input for this script is the scores.json file. # TODO: Write a command to output the names of each player, as well as their city. # Your output should contain 6 lines, each with two words on it. +jq -r '.[] | "\(.name) \(.city)"' scores.json \ No newline at end of file diff --git a/jq/script-06.sh b/jq/script-06.sh index 8b6e74c52..4b895639d 100755 --- a/jq/script-06.sh +++ b/jq/script-06.sh @@ -6,3 +6,4 @@ set -euo pipefail # TODO: Write a command to output just the names of each player along with the score from their first attempt. # Your output should contain 6 lines, each with one word and one number on it. # The first line should be "Ahmed 1" with no quotes. +jq -r '.[] | "\(.name) \(.scores[0])"' scores.json \ No newline at end of file diff --git a/jq/script-07.sh b/jq/script-07.sh index d43f93d1b..46fb466cd 100755 --- a/jq/script-07.sh +++ b/jq/script-07.sh @@ -6,3 +6,4 @@ set -euo pipefail # TODO: Write a command to output just the names of each player along with the score from their last attempt. # Your output should contain 6 lines, each with one word and one number on it. # The first line should be "Ahmed 4" with no quotes. +jq -r '.[] | "\(.name) \(.scores[-1])"' scores.json \ No newline at end of file diff --git a/jq/script-08.sh b/jq/script-08.sh index 6671fd1ba..ecd84638c 100755 --- a/jq/script-08.sh +++ b/jq/script-08.sh @@ -6,3 +6,4 @@ set -euo pipefail # TODO: Write a command to output just the names of each player along with the number of times they've played the game. # Your output should contain 6 lines, each with one word and one number on it. # The first line should be "Ahmed 3" with no quotes. +jq -r '.[] | "\(.name) \(.scores | length)"' scores.json \ No newline at end of file diff --git a/jq/script-09.sh b/jq/script-09.sh index c2536a536..169ea0d67 100755 --- a/jq/script-09.sh +++ b/jq/script-09.sh @@ -6,3 +6,4 @@ set -euo pipefail # TODO: Write a command to output just the names of each player along with the total scores from all of their games added together. # Your output should contain 6 lines, each with one word and one number on it. # The first line should be "Ahmed 15" with no quotes. +jq -r '.[] | "\(.name) \(.scores | add)"' scores.json \ No newline at end of file diff --git a/jq/script-10.sh b/jq/script-10.sh index 8e9d75f07..3472419d7 100755 --- a/jq/script-10.sh +++ b/jq/script-10.sh @@ -5,3 +5,4 @@ set -euo pipefail # The input for this script is the scores.json file. # TODO: Write a command to output the total of adding together all players' first scores. # Your output should be exactly the number 54. +jq '[.[] | .scores[0]] | add' scores.json \ No newline at end of file diff --git a/jq/script-11.sh b/jq/script-11.sh index d2337a6b2..ed3e716c7 100755 --- a/jq/script-11.sh +++ b/jq/script-11.sh @@ -5,3 +5,4 @@ set -euo pipefail # The input for this script is the scores.json file. # TODO: Write a command to output the total of adding together all scores from all games from all players. # Your output should be exactly the number 164. +jq '[.[] | .scores] | add | add' scores.json \ No newline at end of file From 28e279e80a9a8e2f076b0020a0cdd1a01e379f8c Mon Sep 17 00:00:00 2001 From: Emiliano Uruena Date: Tue, 13 Jan 2026 12:04:25 +0000 Subject: [PATCH 3/7] Delete number-systems/README.md This file doesn't belong to this module. --- number-systems/README.md | 66 ---------------------------------------- 1 file changed, 66 deletions(-) delete mode 100644 number-systems/README.md diff --git a/number-systems/README.md b/number-systems/README.md deleted file mode 100644 index 322d053c6..000000000 --- a/number-systems/README.md +++ /dev/null @@ -1,66 +0,0 @@ -Do not use any tools or programming to solve these problems. Work it out yourself by hand, and fill in the answers. - -Do not convert any binary numbers to decimal when solving a question unless the question explicitly tells you to. - -The goal of these exercises is for you to gain an intuition for binary numbers. Using tools to solve the problems defeats the point. - -Convert the decimal number 14 to binary. -Answer: 1110 - -Convert the binary number 101101 to decimal: -Answer: 45 - -Which is larger: 1000 or 0111? -Answer: 1000 - -Which is larger: 00100 or 01011? -Answer: 01011 - -What is 10101 + 01010? -Answer: 11111 - -What is 10001 + 10001? -Answer:100010 - -What's the largest number you can store with 4 bits, if you want to be able to represent the number 0? -Answer: 1111 = 15 (largest representable number) - Number of possible values including 0 = 16 - -How many bits would you need in order to store the numbers between 0 and 255 inclusive? -Answer: 8 bits - -How many bits would you need in order to store the numbers between 0 and 3 inclusive? -Answer: 2 bits => 00, 01, 10, 11 - -How many bits would you need in order to store the numbers between 0 and 1000 inclusive? -Answer: 10 bits - -How can you test if a binary number is a power of two (e.g. 1, 2, 4, 8, 16, ...)? -Answer: Been a binary it would be 1 followed by 0s => 100, 10000, 10 - -Convert the decimal number 14 to hex. -Answer:0xE - -Convert the decimal number 386 to hex. -Answer: 0x182 - -Convert the hex number 386 to decimal. -Answer: 902 - -Convert the hex number B to decimal. -Answer:11 - -If reading the byte 0x21 as a number, what decimal number would it mean? -Answer:33 - -If reading the byte 0x21 as an ASCII character, what character would it mean? -Answer:! - -If reading the byte 0x21 as a greyscale colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? -Answer: Dark Grey - -If reading the bytes 0xAA00FF as an RGB colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? -Answer:Purple (magenta) - -If reading the bytes 0xAA00FF as a sequence of three one-byte decimal numbers, what decimal numbers would they be? -Answer: 170 0 255 From c0569b627a3a889ddfcc44f46150b6de843ddb6c Mon Sep 17 00:00:00 2001 From: Emiliano Uruena Date: Tue, 13 Jan 2026 12:42:56 +0000 Subject: [PATCH 4/7] Fix jq command to correctly sum first scores --- jq/script-10.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/jq/script-10.sh b/jq/script-10.sh index 3472419d7..e1334079b 100755 --- a/jq/script-10.sh +++ b/jq/script-10.sh @@ -5,4 +5,4 @@ set -euo pipefail # The input for this script is the scores.json file. # TODO: Write a command to output the total of adding together all players' first scores. # Your output should be exactly the number 54. -jq '[.[] | .scores[0]] | add' scores.json \ No newline at end of file +jq '[.[].scores[0]] | add' scores.json From fcc6833f08c490e7b411437d39c43e47c9878691 Mon Sep 17 00:00:00 2001 From: Emilianouz <135679131+Emilianouz@users.noreply.github.com> Date: Tue, 13 Jan 2026 14:31:55 +0000 Subject: [PATCH 5/7] Restore deleted file README.md --- number-systems/README.md | 41 ++++++++++++++++++++-------------------- 1 file changed, 20 insertions(+), 21 deletions(-) diff --git a/number-systems/README.md b/number-systems/README.md index 322d053c6..77a3bde94 100644 --- a/number-systems/README.md +++ b/number-systems/README.md @@ -5,62 +5,61 @@ Do not convert any binary numbers to decimal when solving a question unless the The goal of these exercises is for you to gain an intuition for binary numbers. Using tools to solve the problems defeats the point. Convert the decimal number 14 to binary. -Answer: 1110 +Answer: Convert the binary number 101101 to decimal: -Answer: 45 +Answer: Which is larger: 1000 or 0111? -Answer: 1000 +Answer: Which is larger: 00100 or 01011? -Answer: 01011 +Answer: What is 10101 + 01010? -Answer: 11111 +Answer: What is 10001 + 10001? -Answer:100010 +Answer: What's the largest number you can store with 4 bits, if you want to be able to represent the number 0? -Answer: 1111 = 15 (largest representable number) - Number of possible values including 0 = 16 +Answer: How many bits would you need in order to store the numbers between 0 and 255 inclusive? -Answer: 8 bits +Answer: How many bits would you need in order to store the numbers between 0 and 3 inclusive? -Answer: 2 bits => 00, 01, 10, 11 +Answer: How many bits would you need in order to store the numbers between 0 and 1000 inclusive? -Answer: 10 bits +Answer: How can you test if a binary number is a power of two (e.g. 1, 2, 4, 8, 16, ...)? -Answer: Been a binary it would be 1 followed by 0s => 100, 10000, 10 +Answer: Convert the decimal number 14 to hex. -Answer:0xE +Answer: Convert the decimal number 386 to hex. -Answer: 0x182 +Answer: Convert the hex number 386 to decimal. -Answer: 902 +Answer: Convert the hex number B to decimal. -Answer:11 +Answer: If reading the byte 0x21 as a number, what decimal number would it mean? -Answer:33 +Answer: If reading the byte 0x21 as an ASCII character, what character would it mean? -Answer:! +Answer: If reading the byte 0x21 as a greyscale colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? -Answer: Dark Grey +Answer: If reading the bytes 0xAA00FF as an RGB colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? -Answer:Purple (magenta) +Answer: If reading the bytes 0xAA00FF as a sequence of three one-byte decimal numbers, what decimal numbers would they be? -Answer: 170 0 255 +Answer: From ea03ec7036b939e0faf09f1491039f59f939e704 Mon Sep 17 00:00:00 2001 From: Emilianouz <135679131+Emilianouz@users.noreply.github.com> Date: Tue, 13 Jan 2026 14:35:12 +0000 Subject: [PATCH 6/7] Restore deleted file README --- number-systems/README.md | 41 ++++++++++++++++++++-------------------- 1 file changed, 21 insertions(+), 20 deletions(-) diff --git a/number-systems/README.md b/number-systems/README.md index 77a3bde94..322d053c6 100644 --- a/number-systems/README.md +++ b/number-systems/README.md @@ -5,61 +5,62 @@ Do not convert any binary numbers to decimal when solving a question unless the The goal of these exercises is for you to gain an intuition for binary numbers. Using tools to solve the problems defeats the point. Convert the decimal number 14 to binary. -Answer: +Answer: 1110 Convert the binary number 101101 to decimal: -Answer: +Answer: 45 Which is larger: 1000 or 0111? -Answer: +Answer: 1000 Which is larger: 00100 or 01011? -Answer: +Answer: 01011 What is 10101 + 01010? -Answer: +Answer: 11111 What is 10001 + 10001? -Answer: +Answer:100010 What's the largest number you can store with 4 bits, if you want to be able to represent the number 0? -Answer: +Answer: 1111 = 15 (largest representable number) + Number of possible values including 0 = 16 How many bits would you need in order to store the numbers between 0 and 255 inclusive? -Answer: +Answer: 8 bits How many bits would you need in order to store the numbers between 0 and 3 inclusive? -Answer: +Answer: 2 bits => 00, 01, 10, 11 How many bits would you need in order to store the numbers between 0 and 1000 inclusive? -Answer: +Answer: 10 bits How can you test if a binary number is a power of two (e.g. 1, 2, 4, 8, 16, ...)? -Answer: +Answer: Been a binary it would be 1 followed by 0s => 100, 10000, 10 Convert the decimal number 14 to hex. -Answer: +Answer:0xE Convert the decimal number 386 to hex. -Answer: +Answer: 0x182 Convert the hex number 386 to decimal. -Answer: +Answer: 902 Convert the hex number B to decimal. -Answer: +Answer:11 If reading the byte 0x21 as a number, what decimal number would it mean? -Answer: +Answer:33 If reading the byte 0x21 as an ASCII character, what character would it mean? -Answer: +Answer:! If reading the byte 0x21 as a greyscale colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? -Answer: +Answer: Dark Grey If reading the bytes 0xAA00FF as an RGB colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? -Answer: +Answer:Purple (magenta) If reading the bytes 0xAA00FF as a sequence of three one-byte decimal numbers, what decimal numbers would they be? -Answer: +Answer: 170 0 255 From 4c9cee65cd56b24995fff58ac68c2063bd43347c Mon Sep 17 00:00:00 2001 From: Emilianouz <135679131+Emilianouz@users.noreply.github.com> Date: Sat, 14 Feb 2026 11:05:30 +0000 Subject: [PATCH 7/7] Revert "Numeric Systems: answers" This reverts commit 8fb3596668d73582a9b07d2ec8443c837c73c5fd. q --- number-systems/README.md | 65 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 number-systems/README.md diff --git a/number-systems/README.md b/number-systems/README.md new file mode 100644 index 000000000..77a3bde94 --- /dev/null +++ b/number-systems/README.md @@ -0,0 +1,65 @@ +Do not use any tools or programming to solve these problems. Work it out yourself by hand, and fill in the answers. + +Do not convert any binary numbers to decimal when solving a question unless the question explicitly tells you to. + +The goal of these exercises is for you to gain an intuition for binary numbers. Using tools to solve the problems defeats the point. + +Convert the decimal number 14 to binary. +Answer: + +Convert the binary number 101101 to decimal: +Answer: + +Which is larger: 1000 or 0111? +Answer: + +Which is larger: 00100 or 01011? +Answer: + +What is 10101 + 01010? +Answer: + +What is 10001 + 10001? +Answer: + +What's the largest number you can store with 4 bits, if you want to be able to represent the number 0? +Answer: + +How many bits would you need in order to store the numbers between 0 and 255 inclusive? +Answer: + +How many bits would you need in order to store the numbers between 0 and 3 inclusive? +Answer: + +How many bits would you need in order to store the numbers between 0 and 1000 inclusive? +Answer: + +How can you test if a binary number is a power of two (e.g. 1, 2, 4, 8, 16, ...)? +Answer: + +Convert the decimal number 14 to hex. +Answer: + +Convert the decimal number 386 to hex. +Answer: + +Convert the hex number 386 to decimal. +Answer: + +Convert the hex number B to decimal. +Answer: + +If reading the byte 0x21 as a number, what decimal number would it mean? +Answer: + +If reading the byte 0x21 as an ASCII character, what character would it mean? +Answer: + +If reading the byte 0x21 as a greyscale colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? +Answer: + +If reading the bytes 0xAA00FF as an RGB colour, as described in "Approaches for Representing Colors and Images", what colour would it mean? +Answer: + +If reading the bytes 0xAA00FF as a sequence of three one-byte decimal numbers, what decimal numbers would they be? +Answer: