Data Types in Programming
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Questions and Answers

What is the default data type used for integral values unless there is a concern about memory space?

  • int (correct)
  • long
  • short
  • float
  • What data type is used to store a single character in Java?

  • double
  • float
  • boolean
  • char (correct)
  • Which of the following data types is used when a wider range than int is needed?

  • int
  • short
  • float
  • long (correct)
  • What is the purpose of the float data type?

    <p>To save memory in large arrays of floating-point numbers</p> Signup and view all the answers

    What is the default data type used for decimal values?

    <p>double</p> Signup and view all the answers

    Which class in the java.util package is used to read data from the standard input device and store data into variables?

    <p>Scanner</p> Signup and view all the answers

    What is the purpose of using the import statement in Java?

    <p>To import a specific class or package into the current file</p> Signup and view all the answers

    What is the syntax to import a specific class into the current file in Java?

    <p>import package_name.Class_name;</p> Signup and view all the answers

    What is the purpose of using the asterisk (*) wildcard character in an import statement?

    <p>To import all the classes contained in a particular package</p> Signup and view all the answers

    What is the hierarchy of integer data types in Java from lowest to highest precision?

    <p>byte, short, int, long</p> Signup and view all the answers

    What is the purpose of using the byte data type in Java?

    <p>To save memory space in large arrays</p> Signup and view all the answers

    How many built-in primitive data types are supported in Java?

    <p>8</p> Signup and view all the answers

    In Java, what is the purpose of the import statement?

    <p>To import external libraries</p> Signup and view all the answers

    What is the return type of a method that does not return any value?

    <p>void</p> Signup and view all the answers

    What is the data type of the variable 'a' in the given code snippet?

    <p>int</p> Signup and view all the answers

    What is the purpose of the package statement in Java?

    <p>To declare a package</p> Signup and view all the answers

    What happens if the return type of a method is not compatible with the type of value being returned?

    <p>The program will not compile</p> Signup and view all the answers

    What is the data type of the variable 'name' in the given code snippet?

    <p>String</p> Signup and view all the answers

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