GMAT changed the question bank again? Let's talk about those things about changing the library.
It took 18 days to change the database last time, which is called "the longest persistence this year".
Just like all the exams for studying abroad at present, the GMAT exam will have a huge question bank, which will add some new questions every year and eliminate some questions from it.
In the official GMAT guide, the topics updated every year have been deleted from this question bank. The topics of GMAT formal examination are also extracted from this question bank.
Changing the database, as the name implies, is to re-select some new questions from the big question bank and put the questions currently being tested back into the big question bank. In this way, the candidates in the new library will not encounter the problems of the candidates in the old library a few days ago.
This is a way to ensure the fairness of the GMAT exam, and at the same time, it also controls the exposure times of a topic in a period of time, thus protecting the topic from being restored by the outside world.
Unlike other exams, GMAT has exams all over the world almost every day, and its question bank changes very frequently.
In fact, before 20 15, the change of question bank was quite stable, about once a month, but after 20 15, the speed of changing questions became extremely unstable, and the time became shorter and irregular, which further strengthened the fairness of the examination.
Because the database exchange cycle is relatively stable, some opportunistic students will hear the students' discussion after the exam before the exam, get some information in advance, and deliberately sign up for the exam near the next database exchange time, so as to grasp the information in advance to the maximum extent, thus affecting the exam results.
In fact, GMAT has a huge general question bank, which contains all kinds of GMAT exam questions. According to the type, knowledge, difficulty and discrimination of each question, the staff will combine these questions into n small question bank partitions.
Every time I change the database, I take a short section from the big question bank to take the exam. For example, the last exam was C 1, and the next time you change the topic, you will change it to G3. In order to ensure the comparability of the results of each database change, the number of questions, the distribution of knowledge points and the distribution of difficulty in each small partition are similar.
As for the law of changing banks, as I said before, in order to prevent some people from opportunism, the GMAT exam makes the cycle of changing banks irregular and ensures the fairness of the GMAT exam as much as possible.
From the following figure, we can see that the change speed of GMAT official question bank is faster year by year, and the average length of the database is getting shorter and shorter, and there is no way to find the law.
PS: The calculation of warehouse length starts from the date of warehouse change:
*? 20 19 has changed 17 times, with an average duration of 1 1 day;
*? I changed my pants 28 times in 20 18, and the average length was 13 days.
*? I changed my pants 25 times in 20 17, with an average length of 15 days.
*? I changed my pants 18 times in 20 16, with an average length of 20 days;
*? I changed my pants 12 times in 20 15, with an average length of 30 days.
Finally, some careful students found that the shortest time interval allowed by GMAT is 16 days, and the change cycle of GMAT database is often longer than 16 days. Then, "If I am lucky, I will take two exams in the same reservoir area. Will I meet the questions I have done before?"
The answer is no, you will never meet the questions you have done before when you take the GMAT exam. Whether you took the GMAT exam twice in the same reservoir area or a topic was included in several different reservoirs, you won't encounter any topic you have participated in before.
Many students are still struggling: will the problems encountered in going abroad for exams be simpler? Is there a difference between the question bank of domestic examination and that of foreign examination?
In fact, the test bank of GMAT exam is globally synchronized, and the time to change the test bank is also globally synchronized, and the exams in different places are basically the same. On the day of the library exchange, it started from the examination room in New Zealand, then went to Australia, Japan and China, then passed through West Asia, Europe and America, and finally ended in various examination rooms in the western United States.
Perhaps the only difference is that candidates who took the exam in an earlier time zone on the day of changing their pants will find that they have changed their libraries when they enter the examination room, while candidates from Europe and the United States will know that they have entered a new library area by brushing the ChaseDream forum early.
This little difference is not worth taking an international exam at all. Just find a convenient examination room and time.
Because GMAT has a question bank, I have to say machine classics.
Students who pass the exam will discuss their problems with others to see which ones are right and which ones are wrong, so that they can get higher scores in the next exam. Some careful students collected and sorted out the problems discussed by everyone for further communication, and gradually formed machine masterpieces.
However, we should also pay attention to a problem, because the contents of the machine classics are discussed through our own memories after the exam, so many times the information you can provide is not accurate, and sometimes even limited by the ability of the owner of the machine classics, there will be wrong machine classics.
If you expect to improve your exam results by reciting machine classics, don't expect it.
The best way is to look at the machine classics issued by everyone during the review, better find out the loopholes in your knowledge points and enhance your confidence in the exam. Blindly mindless will only make the wrong machine classic and variant topics bite back.
Correct use of computer classics review, every time you change the database, although the topics discussed by everyone will not be encountered again, but because you have mastered the correct ideas and methods of solving problems, it will not have any impact on your exam. Simply pursuing the "tail database" will only make your mentality fluctuate in the examination room and affect your normal play.
Anyway, if you have enough time, you can refer to the classics of the machine and check whether there are any omissions or omissions. If you don't have enough time to prepare for the exam, there is no need to read it The exam really depends on your hard power, and to improve your hard power, you must choose the correct review method.
No matter how good the knowledge points and methods are, if the learners don't allocate them properly, they can't achieve the expected results. Learning without the guidance of a good teacher can only be a blind man touching an elephant.
GMAT.la will have a "Must Out 700+ Community Class" every month, so it is a good choice to lead everyone to systematically review and prepare for the exam!