Exams | Repository contains source code of old exams | Learning library

I'm trying to include the following pstricks code snippet in R/exams .Rmd exercises, but I have no idea how to do it:

Good day, everyone. Hope you're doing well. I'm a Django newbie, trying to learn the basics of RESTful development while helping in a small app project. We currently want some of our models to update accordingly based on the data we submit to them, by using the Django ORM and the fields that some of them share wih OneToMany relationsips. Currently, there's a really difficult query that I must do for one of my fields to update automatically given that filter. First, let me explain the models. This are not real, but a doppleganger that should work the same:

First we have a Report model that is a teacher's report of a student:

I saw a video on Youtube for enhancing the performance of Android Studio. I did and now I can't launch my Android Studio. Now it gives an error saying that "If you already have a 64-bit JDK installed, define a JAVA_HOME variable in Computer > System Properties > System Settings Environment Variables. Failed to create JVM. JVM Path C:\Program Files\Android\Android Studio\jre\jre"

I searched the whole internet and tried every solution mentioned but I still get the "define JAVA_HOME variable" error. I tried both completely uninstalling the Android Studio with all files and related folders manually deleted but still get this error and Android Studio just won't simply run. I have exams in a few days and I have a lot to practice.

Edit:

I just removed the JAVA_HOME. I have both the JDK and JVM installed. I am just uninstalling and installing Android Studio at the moment.

Edit 2:

I am creating a question in r-exams that contains a graph made in TikZ, more specifically https://texample.net/tikz/examples/the-3dplot-package/. For its correct operation it is required that the 3dplot.sty file be in a certain R folder. In which folder should I include this file?

Error message in RStudio: "!LaTeX Error: File`3dplot.sty'not found".

The table contains parts of memory:

The registers have these contents:

I have successfully included in an R/exams .Rmd file several graphics made in TikZ. The same does not happen when I try to include a plot under pgfplots using include_tikz(). Whenever \begin {axis} and \end {axis} are included, beware of the error "! LaTeX Error: Environment axis undefined".

In the RStudio console the legend appears: "This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020) (preloaded format = pdflatex) restricted \ write18 enabled.entering extended mode", even having enabled in TexStudio write-18. None of these messages appear when I include other TikZ graphs other than pgfplots.

Any TikZ graph works when run in TexMaker or TexStudio, which indicates that it is not a problem of the absence of LaTeX libraries or packages.

I include a part of my code, adapted from https://www.latex4technics.com/?note=1HCT:

It is not very clear to me how the standard std::unordered_map container uses hashing.

I am pretty new to hashing, and right now I'm trying to pass my university data structure exams.

I understand that if I have a collection of objects, I have to group their keys as random as possible by a criteria so that they lie as uniformly as possible in some buckets, and I can afterwards search/insert/delete in constant time by looking into the bucket associated with the hashed key (this is mainly what hashing with chaining does, correct me if I am wrong).

But, how does std::unordered_map use hashing? How does it set a new (key, value) pair using hashing? I mean, I know that hashing will group the keys by some criteria, but it is not clear at all how it sets a new (key, value) pair using hashing.

I have a question about OptaPlanner constraint stream API. Are the constraint matches only used to calculate the total score and are meant to help the user see how the score results, or is this information used to find a better solution?

With "used to find a better solution" I mean the information is used to get the next move(s) in the local search phase.

So does it matter which planning entity I penalize?

Currently, I am working on an examination scheduler. One requirement is to distribute the exams of a single student optimally. The number of exams per student varies. Therefore, I wrote a cost function that gives a normalized value, indicating how well the student's exams are distributed.

Let's say the examination schedule in the picture has costs of 80. Now, I need to break down this value to the individual exams. There are two different ways to do this:

• Option A: Penalize each of the exams with 10 (10*8 = 80).
• Option B: Penalize each exam according to its actual impact.=> Only the exams in the last week are penalized as the distribution of exams in week one and week two is fine.

Obviously, option B is semantically correct. But does the choice of the option affect the solving process?

I want to split my app in 2 different parts.

An exam list should link to a student list.