Tag: programming languages

Questions Related to programming languages

class A extends Thread { public void run() { System.out.print("A"); } } class B { public static void main (String[] args) { A a = new A(); a.start(); a.start(); // 1 } }
technology programming languages

  1. Run Time Exception

  2. Compile Error

  3. the code compile and runs fail

  4. None of the above

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Correct Option: A

What type of inheritance does Java have?
technology programming languages

  1. Single Inheritence

  2. Double Inheritence

  3. Multiple Inheritence

  4. Class Inheritence

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Correct Option: A

Java runs on.
technology programming languages

  1. Windows

  2. Unix

  3. Solaris

  4. All of the above

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Correct Option: D

The Java interpreter is used for the execution of the source code.
technology programming languages

  1. True

  2. False

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Correct Option: A

A Vector is declared as follows. What happens if the code tried to add 6 th element to this Vector new vector(5,10)
technology programming languages

  1. The element will be successfully added

  2. ArrayIndexOutOfBounds Exception

  3. The Vector allocates space to accommodate up to 15 elements

  4. None of the above

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Correct Option: A,C

Which is the data structure used to store sorted map elements
technology programming languages

  1. HashSet

  2. Hashmap

  3. Map

  4. TreeMap

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Correct Option: D

Which of the following is true ?
technology programming languages

  1. Stateless session beans doesn’t preserve any state across method calls

  2. Stateful session beans can be accesses by multiple users at the same time

  3. None of the above

  4. Allof the above

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Correct Option: A

Stateful Session beans contain
technology programming languages

  1. Home Interface

  2. Remote Interface

  3. Bean Class

  4. All of the above

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Correct Option: D

A method is defined in a class as : void processUser(int i) { } If this method is overriden in a sub class,
technology programming languages

  1. the new method should return int

  2. the new method can return any type of values

  3. the argument list of new method should exactly match that of overriden method

  4. the return type of new method should exactly match that of overriden method

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Correct Option: C,D

What is the output of following piece of code ? int x = 2; switch (x) { case 1:System.out.println(”1?); case 2: case 3:System.out.println(”3?); case 4: case 5:System.out.println(”5?);
technology programming languages

  1. No output

  2. 3 and 5

  3. 1, 3 and 5

  4. 3

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Correct Option: B