Tag: programming languages

Questions Related to programming languages

What is the rule of anonymous class
technology programming languages

  1. Can have only one constructor

  2. a.Cannot have a constructor

  3. Can have more than one constructor

  4. May or May not have constructors

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Correct Option: B

The following code creates one array and one string object. which object is eligible for garbage collection after the code executes? ... String[] students = new String[10]; String studentName = "Peter Parker"; students[0] = studentName; studentName = null; ...
technology programming languages

  1. Array Object

  2. Neither Object

  3. String Objec

  4. Both of the Objects

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Correct Option: B

Singleton class can have?
technology programming languages

  1. More than one Object

  2. No Objects

  3. Only One Objects.

  4. Two Objects.

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Correct Option: C

Identify the following. x. public final String getDetails(final File file, final String key) throws IOException y. getDetails(File, String)
technology programming languages

  1. X is a method Signature and Y is a method Header

  2. Both X and Y is a method Header

  3. X is a method Header and Y is a method Signature

  4. Both X and Y is a method Signature

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Correct Option: C

Static nested classes do not have access to
technology programming languages

  1. Its non-static members

  2. Static members of the enclosing class

  3. Its Static members

  4. Non-Static members of the enclosing class

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Correct Option: D

Facilities that are provided by Runtime class are:
technology programming languages

  1. Reading data through key board

  2. Using system properties and environment variables

  3. Running non-java programs from within a java application.

  4. All of the Above

  5. None of the Above

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Correct Option: D

Which of the following statements accurately describe the use of access modifiers within a class definition?
technology programming languages

  1. They can be applied to both data & methods

  2. They must precede a class's data variables or methods

  3. They can follow a class's data variables or methods

  4. They can appear in any order

  5. They must be applied to data variables first and then to methods

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Correct Option: A,B,D

What modifiers may be used with top-level class?
technology programming languages

  1. Public

  2. Private

  3. Abstract

  4. Final

  5. Protected

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Correct Option: A,C,D

What is the output of the following Program public class withoutmain{ static{ System.out.println("without the main method"); System.exit(0); } }
technology programming languages

  1. Compile failure

  2. sucessfully compiled, but through exception in run time

  3. It runs sucessfuly and prints "without the main method"

  4. It runs sucessfuly, but No output.

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Correct Option: C

Class C { public static void main(String[] args) { int[]a1[]=new int[3][3]; //3 int a2[4]={3,4,5,6}; //4 int a2[5]; //5 } } What is the result of attempting to compile and run the program ?
technology programming languages

  1. compiletime error at lines 3,4,5

  2. compiltime error at line 4,5

  3. compiletime error at line 3

  4. Runtime Exception

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Correct Option: B