Java

Object-Oriented Programming has the following reasons to be used:
1) OOP provides a clear modular structure for programs.
2) OOP makes it easy to maintain and modify existing code.
3) OOP provides a good framework for code libraries where supplied software components can be easily adapted and modified by the programmer.
4) Code reusability.
5) It is suitable for real word problems and real world works.
Few more points for better understanding are:
Why? Because if you stick to the rules, it makes complex code easier to develop, reliable, maintainable, and generally better.
OOP insists that you think about what you expose to the outside world, it lets you change the implementation of an object without affecting any other code. (Encapsulation)
It allows you to have many different functions, all with the same name, all doing the same job, but on different data. (Polymorphism)
It lets you write a set of functions then expand them in the different directions without changing or copying them in any way. (Inheritance).

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1) What is the course syllabus?
2) Who is your mentor?
3) Are you covering advance topics in this course?
4) How old the training company is?
5) Are you going to provide tools for practice while in class?
6) And ask if you have any specific requirement to join the course.
7) Whether company is partnered to HPE, Oracle etc.
8) Company is ISO certified or not
9) Ask MNC placements List.
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Currently, Python is doing to Java what Java did to C/C+ when Java was at its peak. Back in those days many applications which needed performance did still use C/C+ but accompanied by high maintenance costs from the sheer amount of code written to achieve simple tasks and also the difficulty in building OS and machine independent applications. However, things changed in favor of Java when computers became powerful and hardware costs came down. People (like me) who looked down on using Java to build applications started accepting Java's advantages in building applications. Back then Python was primarily used as a scripting tool and was used in building test automation (and it still is being used for that purpose too.). Now comes the glorious age of data science and various tech startups in e-commerce and social space. What could be done by writing a thousand lines Java code is achieved in a couple of lines of code in Python. This means that there is less maintenance of code. On top of this, Python does not have arcane syntax and the code is pretty much human readable. For machine learning applications there are very good libraries such as Pandas, sci-kit-learn, etc. The primary advantage with Python is that focus can be put on solving business problems rather than spending the most time on fixing bugs related to faulty code. Coming to web development frameworks such as Django, Tornado provides a wide range of needs from quick development to high-performance websites.

Firstly, I'd be cautious to make a claim that C++ is better than Java. There are pros and cons to both sides.
C++ is basically more power to the programmer (since one can break past all sorts of abstractions), and runs natively instead of on a virtual environment (and hence is also platform dependent). A C++ application can manage its own memory in more finer ways than a Java app can. In C++, one can overload operators, access physical addresses and override values there. One can throw and catch any type (.) and do some nasty stuff around all that. On the other hand, in Java, one can sit back and basically just deal with OO abstractions and code them up in one-way, regardless of the underlying platform. Fine-grained memory management is harder. One can play around with GC params for optimizations and get really far this way, but anything more is not really achievable. In C++, you can easily get as deep as you want to.
But, also remember, with great power comes great responsibility. An irresponsible Java developer would be less harmful to your software, than an irresponsible C++ developer would be. In that sense, Java is a relatively easier and simpler language to work with, than C++ is. With C++, a lot of responsibility and burden is on the shoulders of the programmer and with Java, a lot of this, is taken care of, by the system.
There is also a popular performance myth with C++ and Java. Since C++ runs natively, it used to run faster in most platforms than Java does, given the VM is basically emulated. However, this is increasingly being rendered moot, as JVMs end up being very powerful, and processor speeds and architectures have evolved a lot over time.

Java is a simple, object-oriented, interpreted, distributed, robust, architecture neutral, secure, portable, multi-threaded, high-performance and dynamic language.
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Are you looking for the Java Training institutes with Job guarantee Certification? Then, you could check out the below training centre's who provide practical oriented training for placements.
Here are the list of training centre's from different places:
Carvinc: Java Training Institute in Chennai
Inventa: Java Training in Bangalore
VEDANT - Java Training in Mumbai

Since you aren't a complete novice, I think you're ready for C++, for the following reasons:
It's dangerous. Some may think this is a reason to avoid it, but these are things you are going to have to learn.
It's close to the hardware. This makes it fast and optimization and also suitable for tiny little boxes.
It has a good preprocessor. It's as dangerous as juggling chainsaws, but when you start developing a code base that has to compile on multiple systems, you'll really appreciate it.
It has objects without pointers. Traditional objects always have pointers. C++ lets you have objects that are not allocated and not accessed by pointers. Instead, they look like any other data type. This allows some choices that you might not ordinarily make when thinking in terms of objects, which, because of 2, you can optimize to zero cost for production. My favorite example is units. We lost a $328 million Mars orbiter because of different units of measurement (see MARS CLIMATE ORBITER TEAM FINDS LIKELY CAUSE OF LOSS). It's easy to make a units system in C++ and tweak it for hacking, debugging, and running. Also think currencies.
It has a template system. I think this is the most amazing thing about C++ per se. It has been reported that the system is so powerful because of an early implementation made it more powerful than specified. Good. When you can use templates effectively in C++, you're an expert in C++.