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Core Java - Interview Questions and Answers for 'Static final' - 8 question(s) found - Order By Newest | ||||
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Ans. No | ||||
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Like Discuss Correct / Improve  static  final  static final Asked in 1 Companies | ||||
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Ans. Better Control - If the value is being used at multiple locations , that can be controlled better from single place. Any change would only require making single change. Meaning , Aliasing and Better Readability - Sometimes its easy to read the value by its meaning or alias ( 0 as ZERO or 0 as NEUTRAL_VALUE ). | ||||
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Like Discuss Correct / Improve  static final  final variable  variable constants | ||||
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Ans. NUMBER_OF_DAYS_IN_WEEK Constant should be such that it uniquely identifies the value it holds and context of the value. SEVEN uniquely identifies the value but doesn't express the context. Though NUMBER_OF_DAYS_IN_WEEK and NUMBER_OF_DAYS_IN_WEEK_7 makes sense in terms of unique value identification and context but 7 at the end of constant name appears useless as all weeks have 7 days and hence it's the only value it can hold. If it would have been "number of days in a month", it would have made sense to include number of days at the end like NUMBER_OF_DAYS_IN_MONTH_30 NUMBER_OF_DAYS_IN_MONTH_31 NUMBER_OF_DAYS_IN_MONTH_27 NUMBER_OF_DAYS_IN_MONTH_28 | ||||
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Like Discuss Correct / Improve  constant variables  static final variable  java conventions  java naming conventions | ||||
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Ans. NUMBER_OF_DAYS_IN_MONTH_31 Constant should be such that it uniquely identifies the value it holds and context of the value. THIRTY_ONE uniquely identifies the value but doesn't express the context. NUMBER_OF_DAYS_IN_MONTH expresses the context but doesn't specify the value clearly as different month can have different number of days. | ||||
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Like Discuss Correct / Improve  constant variables  static final variable  java conventions  java naming conventions | ||||
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Ans. Objective of constant variable is to provide a context to the value and provide a single point of change. In terms of context, i don't see much need for having constant name for null as null is already self explanatory. In terms of providing single point of change, it doesn't make much sense as it would necessitate that all such placeholders either hold null or a common value. | ||||
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Like Discuss Correct / Improve  constant variables  static final variable  java conventions  java naming conventions | ||||
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Ans. All are valid declarations. | ||||
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Like Discuss Correct / Improve  static final  constants basic | ||||
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Ans. By using static and final modifiers. | ||||
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Like Discuss Correct / Improve  constant variables   static final basic   frequent | ||||
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Ans. 1 Reason being that Class1.xyz is replaced with 1 during pre compilation only and a reference to Class1 is never made. | ||||
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Like Discuss Correct / Improve  static final   pre compilation | ||||