Test
2
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Preguntas del test (20)
1None of the wrapper classes own any static methods.
- AVerdadero
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2You can invoke String methods from a String literal.
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3Two instances of the Integer wrapper class can be compared for equality, on the basis of their int values, using ==.
- AVerdadero
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4The StringTokenizer .nextToken() method actually removes tokens from the tokenizer object.
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5If a method performs an action that could result in an Exception, that action must be contained in a try/catch block.
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6The code that might generate an exception that you wish to catch must be written just before the beginning of the try block.
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7A try/catch block is used to catch exceptions.
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8Exceptions are Objects
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9The value contained in a static attribute can be different for every instance of the class that defines that attribute.
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10A class definition determines and limits the behaviour of an instance of that class.
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11Classes can contain static or non-static methods, but not both.
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12A constructor method is only invoked once during the instantiation of an object.
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13When writing Java programs, it is good programming practice to close all open files before the program terminates.
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14Reading data from a file does not modify the contents of the file.
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15Opening a text file for ‘write’ from a Java program with a FIleOutputStream object can throw a FileNotFoundException.
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16In a Java program, it is possible to have the same file open for output at one point in the program, and open for input at a different point in the program.
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17If a method assigns a new value to an "int" parameter, that value is also assigned to the variable that was passed to the parameter.
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18Suppose Fish is a defined class. It is possible to have two variables myFish1 and myFish2 that refer to the same Fish object.
- AVerdadero
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19A comparison of two objects using == will yield true only if the attribute contents of both objects are exactly the same.
- AVerdadero
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20The == equality operator will always return "true" when applied to two Strings if the two Strings appear the same when printed.
- AVerdadero
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Información
- Descripción
- Test sobre 2, creado por Ricky Zhang el 18/04/2018.
- Autor
- Ricky Zhang
- Idioma
- English
- Visitas
- 13
- Valoración
- Aún sin valoraciones Valora este test