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Java Scanner input

Quiz by Michael Engel

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16 questions
Show answers
  • Q1
    Which method can be used to retrieve an integer input from the user using the Scanner class?
    nextLine
    nextInt
    nextBoolean
    nextDouble
    30s
  • Q2
    Which method is used to retrieve a string input from the user using the Scanner class?
    nextBoolean
    nextDouble
    nextLine
    nextInt
    30s
  • Q3
    Which method can be used to retrieve a double input from the user using the Scanner class?
    nextBoolean
    nextInt
    nextDouble
    nextLine
    30s
  • Q4
    How can you create an instance of the Scanner class to read user input from the console?
    Scanner scanner = new Scanner(System.out);
    Scanner scanner = new Scanner(System.console());
    Scanner scanner = new Scanner(System.in);
    Scanner scanner = new Scanner();
    30s
  • Q5
    Which method can be used to read a character input from the user using the Scanner class?
    nextInt
    next().charAt(0)
    nextBoolean
    nextLine
    30s
  • Q6
    What will be the result of casting a double to an int in Java?
    The result will be zero.
    The decimal portion will be truncated.
    The value will be rounded to the nearest integer.
    The value will be increased by 1.
    30s
  • Q7
    What happens when you cast a boolean to an int in Java?
    It is not possible to cast a boolean to an int in Java.
    The boolean value true is converted to 1 and false is converted to 0.
    The boolean value true is converted to -1 and false is converted to 0.
    The result will be a random integer value.
    30s
  • Q8
    What happens when you cast a char to an int in Java?
    The result will be a random integer value.
    It is not possible to cast a char to an int in Java.
    The character is converted to its uppercase representation as the int value.
    The ASCII value of the character is returned as the int value.
    30s
  • Q9
    What is the purpose of casting in Java?
    To change the value of a variable.
    To convert a primitive data type to an object.
    To convert a value from one data type to another.
    To perform arithmetic operations.
    30s
  • Q10
    Which of the following is true about casting primitives in Java?
    Casting is always safe and doesn't cause any issues.
    Casting can only be done between compatible types.
    Casting is only used for converting numeric types.
    Casting can result in loss of data or precision.
    30s
  • Q11
    Which of the following is NOT a primitive type in Java?
    String
    boolean
    int
    double
    30s
  • Q12
    What is the difference between parseInt and parseDouble in Java?
    There is no difference between parseInt and parseDouble.
    parseInt parses a double while parseDouble parses an integer.
    parseInt parses a string to an integer while parseDouble parses a string to a double.
    parseInt parses an integer while parseDouble parses a double.
    30s
  • Q13
    Which of the following is true about parseInt and parseDouble in Java?
    parseDouble can handle decimal numbers while parseInt cannot.
    parseInt and parseDouble can both handle decimal numbers.
    parseInt can handle decimal numbers while parseDouble cannot.
    Both parseInt and parseDouble can handle decimal numbers.
    30s
  • Q14
    Which method should you use to convert a string to an integer in Java?
    parseInt
    parseString
    convertInt
    parseInteger
    30s
  • Q15
    When should you use parseInt instead of parseDouble in Java?
    When you want to convert an integer to a string.
    When you want to convert a double to a string.
    When you want to convert a string to a double.
    When you want to convert a string to an integer.
    30s

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