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Java Programming :: Language Fundamentals

Language Fundamentals - General Questions
Language Fundamentals - Finding the output

  1. Which one is a valid declaration of a boolean?

    2. A.
    boolean b1 = 0;
    B.
    boolean b2 = 'false';
    C.
    boolean b3 = false;
    D.
    boolean b4 = Boolean.false();
    E.
    boolean b5 = no;

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  2. Which three are valid declarations of a float?

    1. float f1 = -343;
    2. float f2 = 3.14;
    3. float f3 = 0x12345;
    4. float f4 = 42e7;
    5. float f5 = 2001.0D;
    6. float f6 = 2.81F;

    3. A.
    1, 2, 4
    B.
    2, 3, 5
    C.
    1, 3, 6
    D.
    2, 4, 6

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  3. Which is a valid declarations of a String?

    4. A.
    String s1 = null;
    B.
    String s2 = 'null';
    C.
    String s3 = (String) 'abc';
    D.
    String s4 = (String) '\ufeed';

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  4. What is the numerical range of a char?

    5. A.
    -128 to 127
    B.
    -(215) to (215) - 1
    C.
    0 to 32767
    D.
    0 to 65535

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