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Java Programming Fundamentals

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Questions and Answers

Which of the following control structures is used to execute a block of code repeatedly for a specified number of iterations?

While loop

For loop (correct)

Switch statement

If-else statement

What is the purpose of an array in Java?

To display output to the user

To store a collection of values of the same data type (correct)

To store a single value

To perform arithmetic operations

Which of the following is a benefit of using methods in Java?

To make the code more complex

To increase code redundancy

To reduce code duplication and improve modularity (correct)

To decrease code readability

What is the purpose of a flowchart in programming?

To design and visualize the program's logic Signup and view all the answers

What is the concept of encapsulation in OOP?

Hiding the implementation details of an object from the outside world Signup and view all the answers

What is the primary difference between a while loop and a do-while loop in Java?

A while loop checks the condition before the loop body, while a do-while loop checks the condition after the loop body. Signup and view all the answers

What is the output of the following Java code: `int[] arr = {1, 2, 3, 4, 5}; System.out.println(arr[3]);`?

4 Signup and view all the answers

What is the purpose of the `return` statement in a Java method?

To exit the method and return control to the caller Signup and view all the answers

What is the purpose of pseudocode in programming?

To plan and design a program before writing it Signup and view all the answers

What is an example of abstraction in OOP?

A class that represents a complex system in a simple way Signup and view all the answers

Study Notes

Control Structures

A for loop is used to execute a block of code repeatedly for a specified number of iterations.

Arrays in Java

An array in Java is a data structure that stores a fixed-size sequential collection of elements of the same type.

Benefits of Methods

Using methods in Java provides modularity, reusability, and ease of maintenance of code.

Flowcharts in Programming

A flowchart is a graphical representation of an algorithm or a program, used to visualize the flow of control and the logic of the program.

Encapsulation in OOP

Encapsulation is a fundamental concept in Object-Oriented Programming (OOP) that binds together the data and the methods that manipulate that data, and hides them from the outside world.

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Description

Test your knowledge of Java basics, including control structures, arrays, methods, and object-oriented programming concepts.