Tag: programming languages

Questions Related to programming languages

if("String".toString() == "String") System.out.println("Equal"); else System.out.println("Not Equal");

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  1. Code will give compile time error

  2. Code will give runtime error

  3. Code will print "Equal"

  4. Code will print "Not Equal"

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Correct Option: D

What is the super class of hash table?

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  1. Dictionary

  2. Comparative

  3. HashMap

  4. Treeset

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Correct Option: A
Explanation:

To answer this question, the user needs to know about the concept of inheritance in object-oriented programming and the relationship between classes.

The super class of hash table is the Dictionary class.

Option A is correct because Dictionary is the superclass of Hashtable. In Java, the Hashtable class extends the Dictionary class to inherit its methods and properties.

Option B is incorrect because there is no superclass called Comparative for Hashtable or any other Java collection class.

Option C is incorrect because HashMap is not the superclass of Hashtable. Although both classes are used for mapping keys to values, they have different implementation details and are not related by inheritance.

Option D is incorrect because Treeset is also not the superclass of Hashtable. Treeset is a class that implements the Set interface and is used to store a sorted collection of unique elements.

Therefore, the correct answer is:

The Answer is: A

Can an exception be rethrown?

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  1. True

  2. False

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Correct Option: A

What are the implicit packages that need not get imported into a class file?

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  1. java.object

  2. java.io

  3. java.lang

  4. java.applet

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Correct Option: C

Can u overload main()method?

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  1. True

  2. False

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Correct Option: A

Can you make an instance of an abstract class?

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  1. True

  2. False

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Correct Option: A

What is XML?

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  1. Extensible MarkUp Language

  2. Extra Modern Link

  3. Extensible MakeUp Language

  4. X-Markup Language

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Correct Option: A

Which Statement about xml is true?

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  1. Elements may have multiple atrribute with the same name

  2. Quoting attribute is optional

  3. Elements may nest but not overlap

  4. All of the above.

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Correct Option: C

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) Elements may have multiple attributes with the same name - This option is incorrect. In XML, elements cannot have multiple attributes with the same name. Each attribute within an element must have a unique name.

Option B) Quoting attribute is optional - This option is incorrect. In XML, attribute values must always be quoted. The quotes can be either single or double quotes, but they are required to specify the attribute value.

Option C) Elements may nest but not overlap - This option is correct. In XML, elements can be nested within each other, meaning an element can be a child of another element. However, elements cannot overlap or be positioned within each other.

Option D) All of the above - This option is incorrect because only Option C is true.

The correct answer is C. Elements may nest but not overlap. This means that elements in XML can be nested within each other, but they cannot be positioned or overlapped within each other.

What is the correct declation syntax for the version of an XML document?

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  4. none of the above

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Correct Option: C

How is an empty XML element defined?

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  3. None of the above

  4. Option 1 & 2

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Correct Option: D