10 Questions
Which of the following control structures is used to execute a block of code repeatedly for a specified number of iterations?
For loop
What is the purpose of an array in Java?
To store a collection of values of the same data type
Which of the following is a benefit of using methods in Java?
To reduce code duplication and improve modularity
What is the purpose of a flowchart in programming?
To design and visualize the program's logic
What is the concept of encapsulation in OOP?
Hiding the implementation details of an object from the outside world
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.
What is the output of the following Java code: int[] arr = {1, 2, 3, 4, 5}; System.out.println(arr[3]);?
4
What is the purpose of the return statement in a Java method?
To exit the method and return control to the caller
What is the purpose of pseudocode in programming?
To plan and design a program before writing it
What is an example of abstraction in OOP?
A class that represents a complex system in a simple way
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.
Test your knowledge of Java basics, including control structures, arrays, methods, and object-oriented programming concepts.
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