Java MCQs Based online Test-1

Question-1.

Which statements are true regarding ServletContext Init Parameters in the deployment descriptor?

They are set at deployment-time, but accessed at run-time.

They are accessible from any session within that context.

They are not set at deployment-time, but accessed at run-time.

They are set at deployment-time and can be updated at run-time

Question-2.

Which of the following symbols are metacharacters supported by the java.util.regex API?

.

\

@

#

Question-3.

SQLException has a feature of chaining – identify the right code to execute the same from the following

catch(SQLException e) { out.println(e.getMessage()); while((e=e.getNextException())!=null) { out.println(e.getMessage()); } }

catch(SQLException e) { out.println(e.getNextException()); while((e=e.getMessage())!=null) { out.println(e.getMessage()); } }

catch(SQLException e) { out.println(e.getMessage()); while((e=e.getEncapsulatedException())!=null) { out.println(e.getMessage()); } }

catch(ClassNotFoundException e) { out.println(e.getMessage()); while((e=e.getNextException())!=null) { out.println(e.getMessage()); } }

catch(ClassNotFoundException e){ { out.println(e.getMessage()); } }

Question-4.

What is the result of an attempt to compile and run the given program?

public class Test107 {
public static void main(String[] args) {
System.out.println(test());
}
private static int test() {
return (true ? null : 0);
}
}

It gets a compiler error, because of an attempt to return null from the method with return type “int”.

It compiles, but throws NullPointerException at run-time.

It compiles, runs, and prints “null” (without quotes).

It compiles, runs, and prints “0” (without quotes).

Question-5.

Which of the following methods are members of the Vector class and allow you to input a new element?

addItem

append

insert

addElement

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Java MCQs Based Online Test 1

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