IIIT Allahabad, like many educational institutions, has certain subjects that are more challenging for students than others. In this case, five subjects have been singled out: Computer Organization and Microprocessors/Computer Architecture (COM/COA), Storage Technology and Networks (STN), Physics I/II, Mathematics II, and Computer Graphics (CG).

COM/COA is a subject that focuses on the internal workings of a computer and its components, such as processors, memory, and input/output devices. It requires a deep understanding of digital logic and assembly language programming, which can be challenging for students who are not familiar with these concepts. Additionally, the subject covers a wide range of topics, making it difficult for students to master all the necessary information in a short amount of time.

STN is another subject that is known to be difficult for students. This subject deals with the technology behind data storage and network systems, including storage devices such as hard disks and solid-state drives, as well as network protocols and topologies. The subject requires a strong foundation in computer architecture and networking concepts, which can be challenging for students who are not well-versed in these areas.

Physics I/II and Mathematics II are also on the list of most hated subjects. Physics I/II covers a wide range of topics, including mechanics, thermodynamics, and electromagnetism, which can be overwhelming for some students. Mathematics II covers topics such as linear algebra, probability, and statistics, which can be difficult for students who are not comfortable with mathematical concepts.

Finally, Computer Graphics (CG) is another subject that many students find challenging. This subject deals with the creation and manipulation of visual content using computers. It requires a strong understanding of programming languages, algorithms, and data structures, which can be difficult for students who are not well-versed in these areas.

In conclusion, while IIIT Allahabad offers a rigorous curriculum to prepare students for the challenges of the tech industry, there are certain subjects that students find particularly challenging. These subjects require a strong foundation in computer architecture, networking, mathematics, and programming concepts, and it is important for students to seek out additional resources and support to help them succeed.