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11 Cards in this Set
- Front
- Back
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What does the phrase short circuit mean?
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Once the answer is known - stop evaluation of the expression. For example, if a program contained the line "if(x > 5 || y > 5)" then the sub-expression "y > 5" would only be evaluated if the sub-expression "x > 5" was false.
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What is the result of the following code snippet:
if(i > 10) i = 10; System.out.println("i was greater than 10"); |
In cases where the variable i was greater than 10, i will be set to 10. In all cases the string "i was greater than 10" will be printed.
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How can you avoid confusion when using nested if-elses?
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By indenting and blocking carefully, code readability can be drastically improved. This can significantly reduce the number of bugs present in your code.
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What does is the function of the key word final?
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Final signifies a variable whose value will not and can not change. It can help a programmer avoid bugs when using a value that should remain constant because the IDE will raise an error flag if you attempt to change a final variable from its initial value.
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What constitutes a legal variable name?
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o All characters must be letters, digits, $, or _.
o Variable names can't start with a digit, $, or _. o Variable names can't be reserved words (i.e. final, class, public). |
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What convention is used in java for variables names of more than one word?
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Camel case. For example, dataList, myFavoriteMartian, or showMeTheMoney.
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What feature is used to execute the same line(s) of code multiple times?
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A loop.
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What is the difference between a while-loop and a do-while-loop?
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A do-while-loop is always executed at least once, where as a while-loop is never executed if the condition is initially false.
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What type of loop should be used to execute a body of code a set number of times?
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A for-loop.
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What is the scope of a global variable?
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An entire program.
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What is the scope of a local variable?
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A block.
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