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Best Computer Institute Taught Theory with Practical

TCCI is Best Computer Coaching Institute at Ahmedabad, Gujarat. TCCI-Tririd Computer Coaching Institute focuses on providing best teaching to students through different learning method/media. We try our best to give best quality education without any burden at efficient cost.


Team at TCCI consists of experienced and highly qualified professionals. And precise time management help our students in being an edge ahead of their competitors. All computer courses for BCA, MCA, BSC-MSc-IT, Diploma-Degree-Engineering, school-students (any standard), any person are taught at the institute by highly qualified and experienced faculties. One to one teaching method exists here.

Theory with practical session makes student knowledge more strong. TCCI provides Online and Offline both class. Also contains Latest configured PC, Software and IT computer Courses. The institute provides corporate trainings to many of the IT companies & other educational institutes. Teaching Hours are according to students’ convenient time.

So, all of these fetchers make TCCI best computer learning Institute at Ahmedabad.

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What is Abstract class and abstract Method in Java

means something, which is in thoughts but not it exists in reality. It is like that we know that what should be done, but we don’t know how it would be done.

Take an example, there is a ‘Shape’ class which contains a method ‘area()’ but we cannot implement area() method here as we do not know what will be the shape(a square, a rectangle, a triangle or any other shape) in future. In that case, we will declare area() in the Shape class and will implement the same method in our subclasses as per the requirement.

Abstract class & Method in Java_simple


1. public abstract class Shape

2. {

3.       public abstract void area(int var); // Abstract method

4. }

6. public class Circle extends Shape

7. {

8.      int radius;

9.      double pi=3.14;

10.    public void area(int var)

11.      {

12.         radius=var;

13.         System.out.println(“Arear of Circle: “+(pi*radius*radius));

14.       }

15.   }

16. public class Square extends Shape

17.  {

18.    int side;

19.    public void area(int var)

20.      {

21.         side=var;

22.         System.out.println(“Area of Square: “+side*side);

23.      }

24. }

25. public class Result

26. {

27.       public static void main(String[] args)

28.         {

29.             Shape obj=new Square();

30.             obj.area(4);

32.             Shape obj1=new Circle();

33.             obj1.area(3);

34.          }

35. }

In JAVA, Abstraction can be achieved using the abstract class, abstract methods, and interface. Using the abstract class we can achieve the different level of abstraction, but using the interfaces we can achieve 100% abstraction.

Abstract Class:

1. An abstract class would be declared using ‘abstract’ keyword.

2. Creation of object is not possible of an abstract class.

3. It may contain data members, methods, abstract methods, constructors.

4. Data members can’t be abstract.

5. It must be inherited by the subclass(es) using ‘extends’ keyword.

6. The subclass should implement each and every abstract method declared in Super Class. Otherwise, subclass would act like abstract class which needs to be extended further.

Abstract Method:

1. An abstract method can be placed within an abstract Class only.

2. It would be declared using ‘abstract’

3. The abstract method should be declared only without any implementation

4. It can be implemented only in the subclass(concrete class) using ‘extends’ or ‘implements’.

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What is the real example of polymorphism?

Polymorphism means more than one form.


If we represent one thing in different form then it’s called Polymorphism.

The real example of Polymorphism:

Calculator is an example Polymorphism .If we want to do operations like addition, multiplication we can use two methods. It can take any type of arguments like Integer Addition or Double Addition etc and same applies for all other operations i.e the methods specified in your class Calculator. The whole point here is that a single method can take any type of arguments (Integer, Float, Double). Overriding is one way of polymorphism.

A man is Father at home for his children, Husband for his wife and an employee at office. This is also polymorphism. One person have more than one role in his life.

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What is JFX in Java? –

In simple words Java FX is a Framework built on a Java core for visual effect programming.

What is JFX in Java

It is the replacement for SWING. JFX actually uses a scripting language called Java FX Script that is structurally similar to JavaScript, Actionscript and other EX4-type languages. JFX provides a library (or set of libraries) which contain classes, objects, and event handlers designed to streamline the process of creating visual effects.

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Python Constructors

A constructor is a special type of method (function) which is used to initialize the instance members of the class.


2 Types of Constructor

1.parameterized 2. non-parameterized

Constructor definition executes when we create object of the class. Constructors also verify that there are enough resources for the object to perform any start-up task.


Destructors are called when an object gets destroyed. It’s the polar opposite of the constructor, which gets called on creation.

These methods are only called on creation and destruction of the object. They are not called manually but completely automatic.

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Break Statement in C –

The break statement is used to exit from inside loops or switch statement.


The break statement is used to terminate the loop. As soon as the break statement is encountered from within a loop, the loop iterations stops there and control returns from the loop immediately to the first statement after the loop.

Example of Break Statement:

If we want to stop iteration from 6th number then apply condition with break statement.


{ if(i==6)




printf(“hello world\n”);


i                                                       op


1                                                           he…..

2                                                           he…

3                                                            he;;;

4                                                           he;;;

5                                                           he;;;

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Array in C Programming Language –

What is Array?

Array is collection of more than one element of same type at a same memory location.


Declaration Syntax:

Data Type arrayname[size];

Here , size represent number elements stored in Array. This size is maximum
so, user can enter equal or less elements but nor more than elements.

All Elements store in sequence in memory. An each element contain position
which always start from zero.





0 1 2 3

For Example , if we want to store 4 student rollno at a same location then
array has been declared like this:

int rn[4];


Variable cannot store more than one data at a time. Array removes this
limit of variable.


Array can store an elements of same type only.

To enter data in given an array:



Scanf (“%d”,a[i]);


To display data in given an array:

For (i=0;i<n;i++)


Printf (“%d”,a[i]);


We can find maximum element , minimum element , sort the array , search an element from an Array.

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