Practice Basic Structure Of A Java Program (4.2) - Chapter 4: Programming in Java

Practice: Basic Structure of a Java Program

Lesson 4.2Programming in Java

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9 questions

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6 sample questions

Question 1.
What is the purpose of the class in a Java program?
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Think about what holds all elements of the program together.
Question 2.
What will the main method always look like in a Java program?
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Remember the keywords for declaring the main method.
3Question 3.
What is the output of the following code snippet: System.out.println("Hello, World");?
- Hello, World
- Hello World, Error
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Think about how strings are represented.
4Question 4.
True or False: Every Java program must contain a main method.
- True
- False
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Recall the significance of the main method in Java.
Question 5.
Write a Java program that declares a class named 'Calculator' with a main method that performs basic arithmetic operations: addition, subtraction, multiplication, and division. Print the results to the console.
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Think about how to use the System.out.println statement for each operation.
Question 6.
Explain why the main method is static, and provide an example of running a Java program without creating an instance of any class.
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Consider how the Java runtime invokes the main method directly.

5 more questions in this section. Enroll free to practise them all.