Java Basics Exercises – Part 3

Use camel case convention to name this variable.

                class Main {
  public static void main(String[] args) {
    String "" = "Yesterday";
  }
}

lastseen lastSeen last_seen

Use numbers to define related variables.

                class Main {
  public static void main(String[] args) {
    String securityQuestion1 = "What was the name of your first pet?";
    String securityQuestion2 = "What is your favorite book?";
    String securityQuestion"" = "In which city were you born?";
  }
}

What is the output of this Java code?

                class Main {
  public static void main(String[] args) {
    String addressLine1 = "123 Main St.";
    String addressLine2 = "Apt. 4B";
    String fullAddress = addressLine1 + addressLine2;

    System.out.println(fullAddress);
  }
}

Apt. 4B 123 Main St.Apt. 4B

Complete the name of this variable by using camel case convention.

                class Main {
  public static void main(String[] args) {
    String "" = "A4";
  }
}

papersize paper_size paperSize

What’s wrong with this variable?

                class Main {
  public static void main(String[] args) {
    String product category = "electronics";
  }
}

There is no wrong in the code We can’t use spaces in variable names

Which variable name is more descriptive for holding a total budget value?

tb totalBudget

Select the variable name that is more descriptive and meaningful.

                class Main {
  public static void main(String[] args) {
    String "" = "C:\\files\\test.txt";
  }
}

p path

What’s wrong with this code?

                class Main {
  public static void main(String[] args) {
    String budget = "$10000";
    system.out.println(budget);
  }
}

We can’t put numbers into strings The first letter of the system must be in upper-case, so Java won’t run the code successfully

What’s wrong with this code?

                class Main {
  public static void main(String[] args) {
    String url = "https://dejavucode.com";
    System.out.println(URL);
  }
}

We can’t put slash inside a string Java is case-sensitive, so it won’t run the code successfully

What does case sensitivity mean in Java?

It means uppercase and lowercase letters are distinct, for example hello and Hello are not the same It means all letters are automatically converted to lowercase

Java Exercises for Variables

If you’ve faced difficulties with these exercises, take a look at Variables Module on my Java course.

You can also share ‘Java Variables’ Exercises on your:
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Happy Coding!
Behnam Khani

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Java Basics Exercises – Part 3

Java Exercises for Variables