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a. HashMap came before HashTable. b. HashMap allows null values whereas Hashtable doesn’t allow null values. c. HashTable and HashMap allow Key-Value pairs. d. Hashtable is synchronized whereas HashMap is not.
Ans. HashMap came before HashTable.
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Q2676. Which of the following is not the advantage of Mocking frameworks ?
a. It helps testing the module independently b. It helps in faster unit testing c. It helps in testing code even when external dependencies like service calls are not working d. It helps in doing end to end Integration Testing
Ans. It helps in doing end to end Integration Testing
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Q2677. Which of the following is fastest to locate the DOM element ?
a. document.getElementById b. document.getElementByName c. document.ElementName.SubElementName d. They all result in similar performance in retrieving the DOM element.
Ans. document.ElementName.SubElementName
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Q2678. Why should we have Javascript method definitions within HTML Head section ?
a. Its safe to have javascript code within head section b. Head section gets loaded even if there is any error in loading HTML page c. Head section gets executed first and hence assure that js method definition will be loaded before they are called d. So that we can have method definition and method call at the same place
Ans. Head section gets executed first and hence assure that js method definition will be loaded before they are called
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Q2687. Which of the following is dependency exclusion ?
a. A doesn't depend on C and then A marks C as excluded. b. A Depends on B and B depends on C and then A can mark B as excluded. c. A and B depends on C and then they can mark C as excluded. d. A depends upon B and B depends upon C then A marks C as excluded.
a. try block followed by catch b. try block followed by finally c. try block followed by catch block and then finally d. try block without catch or finally block
Ans. try block without catch or finally block
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try block followed by catch block and then finally
try block without catch or finally block
Q2690. Which of the following is not the difference between Singleton and Static class ( Class with static members only ) ?
a. Only one object can be created for Singleton class whereas No objects are created for static class. b. Singleton class instance is initiated using new keyword whereas static class instance is created using static method. c. Singleton class can be serialized whereas Static class cannot be. d. Singleton Class can participate in runtime Polymorphism whereas Static class cannot.
Ans. Singleton class instance is initiated using new keyword whereas static class instance is created using static method.
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Q2691. Which of the following is false about main method ?
a. It should be declared public and static
b. it should have only 1 argument of type String array
c. We can override main method
d. We can overload main method
Q2692. Which of the following is false about Constructors ?
a. Constructor can be overloaded b. A no argument constructor is provided by the compiler if we declare only constructors with arguments. c. Constructors shouldn't have any return types , not even void. d. If super is not explicitly called, still super() is intrinsically added by the compiler.
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Sample Code for Synchronized
Which of the following is false ?
