Java Program Structure and printf Method Quiz

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Questions and Answers

What is the first argument of the printf method in Java?

  • A placeholder for a value
  • A list of format specifiers
  • A format string (correct)
  • A comma-separated list of data

Which class in Java enables a program to read data for use in a program?

  • FileReader class
  • InputReader class
  • Scanner class (correct)
  • DataReader class

Which of the following is a primitive type in Java?

  • String
  • Array
  • Integer
  • short (correct)

What are the primitive types in Java?

<p>boolean, byte, int, short, long, float, double, char (C)</p> Signup and view all the answers

What does each format specifier in Java's printf method start with?

<p>A percent sign (%) (C)</p> Signup and view all the answers

Which method in Java is used to display formatted data with multiple method arguments placed in a comma-separated list?

<p>System.out.printf (D)</p> Signup and view all the answers

Which class in Java enables a program to read data for use in a program?

<p>Scanner (D)</p> Signup and view all the answers

Which of the following is a Java primitive type?

<p>double (D)</p> Signup and view all the answers

What does each format specifier in Java's printf method start with?

<p>Percent sign (%) (B)</p> Signup and view all the answers

Which Java arithmetic operation has the highest precedence?

<p>Parentheses (C)</p> Signup and view all the answers

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Study Notes

Java Basics and Key Concepts

  • The first argument of the printf method in Java is a format string that specifies how to format the subsequent arguments.
  • The Scanner class in Java enables programs to read input data from various sources such as keyboard input, files, and streams.
  • Primitive types in Java include int, char, boolean, byte, short, long, float, and double. These are basic data types built into the language.
  • Each format specifier in Java's printf method begins with a percent sign (%) followed by a character that determines the type of value to be formatted (e.g., %d for integers, %f for floating-point numbers).
  • The System.out.printf method in Java is used to display formatted data with multiple arguments, formatting them according to the specified format string.
  • Among the Java arithmetic operations, the multiplication (*) and division (/) operations have higher precedence than addition (+) and subtraction (-), and both have the same precedence level.

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