Programming

It is very straightforward, but not easy. You should learn in an effective general way like you would study any other subject.
Pick study materials of an appropriate level, do not rush things. For example, pick a book on programming language like Python for beginners, take a MOOC course and practice a lot as you learn new material.
Read a few books on different topics like programming languages, networks, web, OS, databases, algorithms and data structures, GIT. This will set a good base for you.
After you read a few books and practice all that you will know yourself how to continue, what to learn and what's the most efficient way for you.
It's really straightforward, but takes time to become good at it.
Keep learning new languages like every year or so, and master at least one.

Hi,
Here is the preparation strategy for TISSNET to avoid some of the common mistakes in the exam:
Getting through HRM & LR programme at TISS Mumbai involves three stages:
TISSNET
Group Discussion and Essay
Personal Interview
TISSNET: It is an online aptitude exam and is divided in three sections (weightage is roughly equal for each section, though subject to change every year):
Quant: If you are already preparing for other management exams then you will find the Quantitative Aptitude questions to be fairly easy. However, if you are only aiming for TISSNET then I would suggest you to cover all Quant topics that are covered in management exams. You only need to practice low-medium level of difficulty questions.
Also, in 2016, the paper had some questions based on Data Interpretation, therefore, again I would suggest you to be well-versed with different types of questions in DI on the low-medium difficulty scale.
Verbal: Verbal section again is fairly easy. You need to have a decent command over the language to score full in this section. Be well-versed with basic Reading Comprehension passages.
General Knowledge: This is the make or break section in TISSNET. The GK is both current and static and covers areas ranging from economics to geography to politics. Therefore, your preparation on the subject should be thorough. I suggest you to do the following to prepare the section:
Read newspapers daily
Solve online GK questions covering all areas (The Aspirants Committee of HRM & LR, TISS Mumbai posts sample General Knowledge questions every alternate day on Facebook)
Be well versed with the new laws
Read up in detail about the government schemes
Additional Information:
Practice sample question papers (Extremely Important, also focus on speed)
The cutoff is high (based on the difficulty level), therefore, aim at scoring full marks in Quantitative and Verbal section.
Personal Interview:
Personal Interview is the game changer for getting into the course. Therefore, lay a strong focus on its preparation.
This part of the answer is just to you give you a sense of the characteristics the interviewers might be looking for in a prospective HR student and will not jot down the entire half an hour interview because the questions can vary from person to person and the assessment criteria for the interview is confidential. So, there are no fixed questions and no questions that the coaching centers have prepared you for.

The qualification for the NET exam is minimum 55% marks in Masters degree from any recognized university or institute of India.
As you have completed the MA in History, if you have got more than 55% marks in your Masters degree than you can surely apply for the NET exam.
There is 5% percentage relaxation for the reserved category candidates.
I found a blog where, you can check the complete eligibility criteria in detail from the link given below:
https://scoop.eduncle.com/ugc-net-exam-eligibility check in details here.
The NET exam is conducted for the selection of the candidates for assistant professor posts or junior research fellowship in top most institutes of India.
There is no age limit for the assistant professor posts while candidates applying for Junior Research Fellowship should be below 28 years old.
Also you can check official website for more detail about the latest information regarding the NET exam.

The syllabus of TISS NET:
1) English- 30 marks
2) Maths and logical reasoning- 30 marks
3) General Awareness- 40 marks
The topics in English include:
Reading Comprehension, Antonyms, Synonyms, one-word substitutes, odd man out, right usage of word in fill in the blank, homophones, idioms and phrases
The topics in maths include:
Percentage, profit and loss, average, ratio, number system, Time and work and basic geometry.
The topics in logical reasoning include:
Number series, alphabet series, eye for detail, coding-decoding, arrangement, assumptions, conclusions, argument, puzzle, vein diagrams, cubes.
Topics in General awareness:
Current affairs, Environment & Ecology, Politics, History, Governance, Law, Economy/ Policy, Gender/Health/Education, Labour, Media, ICTs, Literature, Art, Culture, sports.