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programming languages Online Quiz - 68

Description: programming languages Online Quiz - 68
Number of Questions: 20
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Tags: programming languages
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We can modify value of literals as below: char *name="David"; *name='X';
technology programming languages

  1. True

  2. False

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Correct Option: B

The expression: i++ * ++i; is not well defined.

technology programming languages

  1. True

  2. False

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Correct Option: A

Casting the return value from malloc function is necessary.

technology programming languages

  1. True

  2. False

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Correct Option: B

In the init(ServletConfig) method of Servlet life cycle, what method can be used to access the ServletConfig object ?
technology programming languages

  1. getServletInfo()

  2. getInitParameters()

  3. getServletConfig()

  4. None

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Correct Option: C

Which of the implicit objects won’t be available ?
technology programming languages

  1. session, request

  2. exception, request

  3. exception, config

  4. session, exception

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Correct Option: D

ejbCreate() method of CMP bean returns

technology programming languages

  1. null

  2. Primary Key class

  3. Home Object

  4. Remote Object

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Correct Option: A

Which of the following is correct syntax for an Abstract class ?
technology programming languages

  1. abstract double area() { }

  2. abstract double area()

  3. abstract double area();

  4. abstract double area(); { }

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Correct Option: C

What is the output of following block of program ? boolean var = false; if(var = true) { System.out.println(“TRUE”); } else { System.out.println(“FALSE”); }

technology programming languages

  1. TRUE

  2. FALSE

  3. Compilation Error

  4. Run-time Error

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Correct Option: A

What is an infinite loop?

technology programming languages

  1. A loop that functions infinitely well

  2. A loop that runs forever

  3. A loop that never starts

  4. A loop that will never function

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Correct Option: B

One of the new features in the JDBC 2.0 API is the ability to move a result set's cursor Backward as well as Forward
technology programming languages

  1. True

  2. False

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Correct Option: B

Which interface is implemented by the services in order to pass configuration information to a Servlet when it first starts
technology programming languages

  1. Structs Config

  2. WebXML

  3. ServletConfig

  4. None of the above

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Correct Option: C

In JDBC ______________ used to create an instance of a driver and register it with the DriverManager. When you have loaded a driver, it is available for making a connection with a DBMS.
technology programming languages

  1. Class.forName

  2. Class.JDBCODBC

  3. Class.JdbcDriver

  4. Class.Loader

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Correct Option: A

_________ method for posting the information in Action class

technology programming languages

  1. doGet()

  2. doPost()

  3. execute()

  4. validate()

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Correct Option: B

Which abstract class is the super class of all classes used for writing characters. Select the one correct answer.

technology programming languages

  1. FileWriter

  2. CharWriter

  3. Writer

  4. OutputStream

  5. FileOutputStream

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Correct Option: C

__________ will be automatically invoked when an object is created.

technology programming languages

  1. method

  2. garbage collection

  3. finalizer

  4. Constructor

  5. none of the above

Show answer
Correct Option: D

AI Explanation

To answer this question, you need to understand the concept of constructors.

Option A) method - This option is incorrect because a method is a block of code that performs a specific task. It is not automatically invoked when an object is created.

Option B) garbage collection - This option is incorrect because garbage collection is the process of automatically reclaiming the memory occupied by objects that are no longer in use. It is not invoked when an object is created.

Option C) finalizer - This option is incorrect because a finalizer is a special method that is automatically called before an object is garbage collected. It is not invoked when an object is created.

Option D) Constructor - This option is correct because a constructor is a special method that is automatically invoked when an object is created. It is used to initialize the state of the object and allocate memory for it.

Option E) none of the above - This option is incorrect because option D, Constructor, is the correct answer.

The correct answer is D) Constructor. This option is correct because a constructor is automatically invoked when an object is created.

In order for a source code file, containing the public class Test, to successfully compile, which of the following must be true?
technology programming languages

  1. It must have a package statement

  2. It must be named Test.java

  3. It must import java.lang

  4. It must declare a public class named Test

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Correct Option: B

_____________ is the mechanism that servlets use to have a client hold a small amount of state information associated with the user.
technology programming languages

  1. sessions

  2. HttpRequest

  3. HttpResponse

  4. Java Beans

  5. Cookies

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Correct Option: E

If you want to modify the servlet, The webserver need to be shutdown.

technology programming languages

  1. True

  2. False

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Correct Option: B

The following is NOT an example of a data type.

technology programming languages

  1. int

  2. public

  3. Button

  4. void

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Correct Option: B

One of the new features in the JDBC 2.0 API is the ability to move a result set's cursor Backward as well as Forward
technology programming languages

  1. True

  2. False

Show answer
Correct Option: B
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