I think this is a good question and answer in the sense that it reveals a fundamental misunderstanding on the part of the student - exactly what you hope an exam would do! (Except for how this seems to combine javascript’s .length and python’s print statement - maybe there is a language like this though - or ‘print’ was a javascript function defined elsewhere).
This reminds me once of when I was a TA in a computer science course in the computer lab. Students were working on a “connect 4” game - drop a token in a column, try to connect 4. A student asked me, while writing the drop function, if he would have to write code to ensure that the token “fell” to bottom of the board, or if the computer would understand what it was trying to do. Excellent question! Because the question connects to a huge misunderstanding that the answer has a chance to correct.
Teaching complete “clean slates” is a great way to re-evaluate your understanding.
I’ve had to teach a few apprentices and while they were perfectly reasonable and bright people, they had absolutely no idea, how computers worked internally. It’s really hard to put yourself in the shoes of such persons if it’s been too long since you were at this point of ignorance.
I forget which one, but one of my flight instructor textbooks said “to teach is to learn twice.” And BOY HOWDY is that accurate.
You will find no better teacher of expert aeronautics than a brand new student. They will show you a new perspective, every single time.
Second this. I’m a teacher aid and I get to fix student’s code for students who are not technically inclined. It’s so much fun and I’ve learned so much McGuivering all that shitty mess together.
For reference the “language” used in the exam would probably be Exam Reference Language (OCR exam board specifically, which I believe this question is from) which is just fancier pseudocode.
To add on to exam reference languages, this is valid ruby
It’s obviously:
Traceback (most recent call last): File “./main.py”, line 2, in <module> AttributeError: ‘str’ object has no attribute ‘length’
Ah yes, all pseudocode is python
Ah yes, python is psuedocode
I deduce these two sets must be the same then?
print("x")
is you want to screw your students.screw your students
ಠ_ಠ
“Dr. Prof. Mann, I really didn’t understand anything about UNIX on that last midterm. Can we go over how to
touch
andfinger
after class?”
They missed out the context code:
trait DoW { def length: FiniteDuration } object Monday extends DoW { override def length = 24.hours } ... implicit def toDoW(s: String): DoW = s match { case "Monday" => Monday ... } var day: DoW = _
(Duration formatting and language identification are left as an exercise for the reader)
Upvote for using Scala.
Implicit was too much of a give away wasn’t it?
I’ve literally seen code that does something awfully similar. But you could have used an Enumeration.
Fuck, I think you just gave me an idea for an issue in my code that has bugged me for days.
I could’ve used a lot of things, but I’m on my phone and I wanted fewer characters to render it, whilst being sure it would work without having to run it.
Also, I am pleased to have maybe helped. Perhaps we can be friends, you and I. Perhaps not. Idk, maybe you punch dogs, why would you do that? Seems mean.
Have you ever just, like, edited a comment? How do people know when you did it? I guess if I were writing a thing to check it I’d use a registry of timestamps and checksums… So, like, ok, you can track, but why, how does it look?
Anyway sorry I had some drinks between now and first post, goodnight
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Works even better in Ruby, as the code as given is valid, you just need to monkey patch
length
:#!/usr/bin/env ruby module DayLength def length if ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"].include? self "24 hours" else super end end end class String prepend DayLength end day = "Monday" x = day.length print(x)
Code as given can be made valid in scala I believe. My starter was based on that assumption. I think raku can do it too, but you would probably have to
\x = $
to make it work…Edit: misread your comment slightly, CBA to change mine now. It is what it is
The answer is 6. It’s 6 characters long.
Not really, no. That would be the answer if x= len(day). The code in the image would just throw an error.
Yea, it’s pseudo code.
“Monday”.length is working JavaScript and does equal 6. No print command afaik though.
There technically is!
https://developer.mozilla.org/en-US/docs/Web/API/Window/print
Well. In browsers, anyways.
Yes, but it prints the page, so in this case it wouldn’t print anything
function print(str) { console.log(str) }
FTFY
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You don’t need terminating semicolons in JavaScript. They’re added in if missing. It can actually cause a few bugs around returns.
no it wouldn’t, because this is OCR reference language
What the heck, did someone invent a programming language, so students wouldn’t have to learn any real ones?
Having done OCR GCSE computing:
It’s just a pseudocode style language that they use in exam questions so that you can understand the question regardless of which language your school had you study (in my case it was VB6 💀). In questions where you are asked to write code, you can use the reference language but realistically you just use the one you learned (although I did it all in python instead)
Huh interesting. In Scotland we had another one: https://en.wikipedia.org/wiki/Haggis_(programming_language)
How do you know what language this is?
Is it wrong that I’m stuck trying to figure out what language this is?
Trying to figure out what string.length and print(var) exist in a single language… Not Java, not C# (I’m pretty sure its .Length, not length), certainly not C, C++ or Python, Pascal, Schme or Haskell or Javascript or PHP.
OCR exam language, a pseudocode format.
This could run in Javascript if you setup print as an alias for window.alert or console.log
It can run in regular JS;
print()
just prints the page (ignoring the passed value).undefined
The QuickJS interpreter has
print
as a built-in alias forconsole.log
.
I’m very much guessing that this is just supposed to be a type of pseudocode given the context and vagueness of it.
It’s a big reason why I really dont like pseudocode as instruction to people learning the basics of what programming is. It made more sense 20 years ago when programming languages were on a whole a lot more esoteric and less plain text, but now with simple languages like Python there’s simply little reason to not just write Python code or whatever.
I took an intro to programming class in College and the single thing I got dinged on the most is “incorrect pseudocode”, which was either too formal and close to real code or too casual and close to plain English.
It’s not a great system. We really need to get rid of it as a practice
Especially since python is right there.
I mean once you get beyond bash-like scripts python is esoteric as fuck, adding oop to what is essentially a shell is a terrible idea
That said, there’s plenty of languages with good syntax that is still good when you get into more complex stuff (modern C#, scala, kotlin and more)
The only thing esoteric about python is the bolted-on typing and anything behind a double underscore.
So yeah, it’s there, but in front of the curtain it’s practically pseudo code.
I think you’re missing the forest for the trees here pretty heavily.
Yes, Python has some goofy aspects about managing it while performing high level, in depth tasks.
This is a post and a comment chain about pseudocode being taught to people who likely just learned what a “programming language” was several weeks ago. Essentially no one taking the GCSE knows what “bash-like scripts” even means.
I disagree. Python is not “esoteric” when making objects. The syntax is certainly easier than in Java.
The syntax is certainly easier than Java
And VisualBasic’s syntax is easier than COBOL, but this isn’t a competition to make the least offensive heap of putrid garbage, so why does it matter?
Python works just fine for basic scripts, frankly it’s amazing for it, but oop and functional programming is so incredibly obviously badly shoehorned in that huge swathes needs scrapping and version 4 releasing
Then help me understand please. What do you mean by “esoteric” in regards to oop in Python compared to a language better suited for it?
What part(s) of python do you think is esoteric?
Wut
Reminds me of 7th grade math class, chapter on estimating. Assignment was “Estimate the following values” with problems like 42+28=? or 14*3=?
One of them was 6*7=? Which having memorized my times tables in 4th grade like they told me to, I knew off the top of my head that it’s 42. I wrote that. And it was marked wrong because I was too precise.
In the 90s my high school used Pascal. That seems reasonable if you only want to teach procedural
Just pseudocode.
JavaScript has
[
].lengthdoesnt have
print
nor allow variable declaration without keywordsprint()
will print the text to a physical printer with paper and everything. Don’t confuse it withconsole.log
and use it in a loop.it’s so rough learning this by accident
It would have print if it was previously declared as function.
Also, js is as dirty as you want it to be. Keywords are indeed not necessary for declaring variables.
JavaScript is the language of the assassins, with its infinitely modifiable prototypical setup
Nothing is true
true !== 1
true
true + true + true === 3
true
Everything is permitted
[]+[]
''
Sure you can write
foo = 3
in JavaScript. It’s a global variable and can be referenced as eitherfoo
orwindow.foo
.
That recurring puzzle is among the most interesting aspects of this community, IMHO.
It’s weird that people are so focused on it. It’s pseudocode, and it’s purely meant for day one comp sci students to grasp how data is stored and processed, before they are forced into writing Java, most likely
Most irritating aspect of switching languages. How are switches done in this one again?
•Searches web•
Ah yes
To be honest, that was the biggest value proposition of GitHub Copilot.
My headcanon: it’s a language that gets executed by a LLM. Whatever you write, if the LLM can make sense of it, it will execute it.
The output may well be “24 hours”.
This is quite a cheap answer but maybe it’s just pseudo code. We had exercises in university about pseudo code with examples that intentionally broke all syntax systems and conventions to show that not everything has to be executable that you write down in a theoretical computer science homework
It’s a shitty question. It’s implied by the fact that “24” is wrong that the answer is “6”, the length of the string “Monday”.
In some languages dot access on objects could give you the properties of the object type (things pertaining to a “day” object) but this would still be ambiguous since a day’s length can be measured in many different ways.
In others, it would require you to call length as a function (.length()) or not be available at all, or require you to pass the object into another function [ length_in_seconds(day_x)]
I think the question is fine, but we have to assume they covered this type of method prior to the exam, where .length would result in the character count of a String.
It could be Ruby;
puts
is more common, but there is aprint
. With some silly context, the answer could even be correct:#!/usr/bin/env ruby module DayLength def length if ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"].include? self "24 hours" else super end end end class String prepend DayLength end day = "Monday" x = day.length print(x)
Pseudocode and/or a variant of lua.
Scala and Kotlin are close ones, although those requires variables to be declared with
var day = “Monday”
(unless the variables are declared elsewhere)Same thoughts I had.
- Language which allows variable declaration as
name = value
without any keywords or its a variable declared outside of the example - Has lowercase
.length
and not.len
or other .length
is also a property and not a method? Assuming convention.length()
for method call likeprint(x)
- Language which allows variable declaration as
Why not Python? Because it needs print(str(x))?
It’s len(str) in Python. Not str.length.
Ohhh thanks
The amount of people nitpicking about the brand of pseudocode or arguing the question is tricky reminds me of some coworkers, and not the good kind.
If you belong to the above category, try to learn some new programming language / read about some algorithm descriptions (not implementation) and go out take some sun. The question is super intuitive if you’re not stuck to a single paradigm or language.
Exactly. It’s pseudo code. It’s meant to be universally understandable, not language specific.
So I teach coding to idiots. Confusing or poorly defined abstractions in pseudocode are bad. If you want people to infer useful information from pseudocode, and learn good practices from it, you need to treat it as if there a real underlying class structure written with good practices, or even better, make it comply to some actual language which does that. If you want to imply that this is a member of string, something like string.len_chars is way better imo because it captures the idea of a string being an array<char>. Then the next question can be about string.len_bytes (watch the wheels turn!). That naturally transitions nicely into object oriented paradigms of object containers/storage being at once a templated abstraction with a stride and depth, and also a physical thing in memory.
i’m of the belief that pseudocode should be real code that actually runs. I.E. something like bash. A scripting language.
Starting off a noob programmer in Bash… Pure evil
The first language I tried to learn as a kid was Batch scripting…
(edit: and then some VBScript along the way! Eventually worked my way to C++ though)
thats why i hate pseudocode.
I would much rather just learn an actual language, or two even. At that point.
Good thing this only uses ASCii characters, else you get into some fun discussions about UTF encoding
But does it count the null byte or not?
In most languages, length method doesn’t count the null terminator. Might result in some fun memory errors
Trick question?
attribute error
Poor question more likely
I am currently looking for job opportunity and amount of gotcha type question i see in OA is just something else.
I can’t imagine that’s any fun to deal with.
“You should have known what the intent of the question was. Management won’t know or care about the internals of your code as long as it meets requirements. You have failed this test.”
Or
“You should know that you’re calling a function with invalid parameters. Where did you get your CS degree from again?”
“You should have known what the intent of the question was. Management won’t know or care about the internals of your code as long as it meets requirements. You have failed this test.”
“You should know that you’re calling a function with invalid parameters. Where did you get your CS degree from again?”
sigh you can have your ransom, just remove the cameras.
Do we know it is Python?
looked into it, gcse cs uses python in syllabuses.So, most likely
no the school can realistically choose any sensible language, the one in the exam question is a pseudocode one that is used only to make the exam questions understandable regardless of which language you studied
Are they using a red pen to write the checkmarks for correct answers to make it confusing but logical at least?
Grading in red is generally avoided, nowadays. Red is closely associated with failure/danger/bad, and feedback should generally be constructive to help students learn and grow.
I usually like to grade in a bright colour that students are unlikely to pick: purple, green, pink, orange, or maybe light blue (if most students are working in pencil). Brown is poo. Black and dark blue are too common. Yellow is illegible. Red is aggressive.
Anyway, I’m guessing they just graded everything in green. The only time I’ve ever graded in more than one colour was when I needed to subgrade different categories of grades, like thinking/communication/knowledge/application. In that case, choosing a consistent colour for each category makes it easier to score.
Nah, just using one of those handy pens with blue, black & 2 red ink. ;)
does it give reference to what language this is in?
x = string length of “Monday” => 6
passed my gcse?
86400000
I wonder if day length is given separately in a table prior to the question? I’m not sure what they wanted except maybe seconds?
It’s the length of the string. The number of characters is 6. It’s a play on words and a question.
Oh wow. Thanks
I’m not really a fan of this kind of question. Especially if there’s enough questions that time will be an issue for most. Because at first glance it’s easy to think the answer might be the length of a day.
There shouldn’t be a need to try to trick people into the wrong answer on an open question. Maybe with multiple choice but not an open answer question.
It relies on critical thinking (meaning thinking about your own thinking), basically, and most students aren’t very good at that.
This doesn’t rely on critical thinking. It just relies on understanding what “.length” does, which would’ve been previously covered in the lessons.
Well, both. If you rushed through without recalling that length has specific meaning relative to strings, even though you do know that, that’s a critical thinking failure. But yeah, not knowing strings could do it too.
If you didn’t know the answer, it’s a critical thinking exercise? Not at all.
Answering this question relies completely on understanding programming. A correct answer cannot be reached without an understanding of programming.
A correct answer cannot be reached without an understanding of programming.
Yes. It does not follow, though, that knowledge of programming always leads to a correct answer. Since you seem like someone who might appreciate a formal logical description, you are affirming the consequent here.
Again, without sufficient critical thinking one might just miss the detail that “Monday” is a string and not a custom unit-of-time object, inheriting from
Day
.
I get your point about it being a trick question but I think in this case it’s pretty reasonable that you would see code like this in real life. Where the programming metaphor and your understanding of the real world clash. It’s a very important skill to be able to spot the difference.
The compiler or interpreter does that for you. There’s no point in these “gotcha’s”. They are cute brain teasers that belong on those useless “are you a programmer” quizzes you find on random meme websites, not an exam.
In the error shown a compiler would be just fine and run as usual but the person programming it would be expecting a different result so a compiler wouldn’t do this for you since it’s a logical error and not a syntax error.
If it’s a statically typed language and
x
is of typeDate
, it’s for sure throw a type error when trying to assign a string to it. If it had autoboxing / auto type conversion fromString
toDate
, length could return a number or a string.If this were Javascript on NodeJS, it would fail at
print(x)
because that doesn’t exist in JS. If it were Python it would fail atx.length
because that has to belen(x)
. And so on.If this were all to pass, at the latest at runtime, when the programmer sees the output “6”, they would know something’s up.
As I said, cute, but worthless test.
Software engineering as a discipline is pretty much a series of trick questions.
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I’m assuming they wanted the literal length of the string
That seems to be the consensus.
Naw, they wanted the metaphorical length. Computers are great at metaphors.
Conversations about language aside, the error is that “Monday” is a string with a length of 6.
What is the type of the variable
day
though? As it is we have to make multiple assumptions, based on popular programming languages, about the internals of thestring
type and theprint
function to assume that it prints “6”.There is a fairly good chance that there has been more info presented in the class than we have been given here.
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That’s the variable name, not the type
Most date libraries count to 23h 59m 59s then roll over to 00h 00m 00s. So the answer is 23 hours, not 24.
Edit: I’m big dum dum. It’s asking string length of “Monday”, thus 6.
You’re also mistaken about the time too. The first second of the day is 00:00:00 the last second of the day is 23:59:59
That’s still a full and exact 24 hours.
Yes, it’s a full 24 hours, but a library doesn’t use 24:00:00 to represent the last hour, it’s 23:59:59. Once it hits 24:00, it rolls over to 00:00:00.
Hence my initial error of answering 23.
It’s not valid, but I don’t edit out erronous answers because I believe all data should be preserved, no matter how dumb it makes one look.
00:00:00 is the 1st second of the day. 23:59:59 is the 86400th second of the day. That’s 24 hours.
It’s not valid, but I don’t edit out erronous answers because I believe all data should be preserved, no matter how dumb it makes one look.
Doing the lord’s work.
I have but one up vote and you already have it.
The future is not yet young man.
For 1 hour = 4^(-1) characters