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Q942. 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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Q944. 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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Q946. How can we execute a Java class independently if it doesn't have a static main method ?
a. By initiating the flow in any of the static method b. By initiating the flow in any of static block c. By initiating the flow in any other instance method named as main d. By initiating the flow in any other instance method named as main and making it final
Ans. By initiating the flow in any of static block
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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
Q957. 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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Q967. Which of the following do you think is the primary reason you would never use a static class even the application doesn't need multiple requests or threads ?
a. Serialization
b. Runtime Polymorphism
c. Lazy Loading
d. Memory
Ans. Runtime Polymorphism
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a. A Sequence File contains a binary encoding of an arbitrary number of homogeneous writable objects. b. A Sequence File contains a binary encoding of an arbitrary number key-value pairs. Each key must be the same type. Each value must be of same type. c. A Sequence File contains a binary encoding of an arbitrary number of heterogeneous writeable objects. d. A Sequence File contains a binary encoding of an arbitrary number of Writable Comparable objects, in sorted order.
Ans. A Sequence File contains a binary encoding of an arbitrary number key-value pairs. Each key must be the same type. Each value must be of same type.
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a. One Key and One Value b. Multiple Keys and Multiple associated Values c. Multiple Keys and One associated values with each d. One key and associated values.
Ans. One key and associated values.
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java testing junit unit testing
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Rarely asked as it was introduced with Java 8.
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Which of the following is not possible ?
