How to enable social login directly on question page?

Hi Ejaz !
At the moment, we don’t support the social login for Q&A plugin yet, but you can try to find some social login plugins on the WordPress repository, or just check out this article: http://wp.smashingmagazine.com/2012/05/29/login-wordpress-using-social-network/.
After you install a plugin (for ex: wordpress social login plugin), open up the answers.php file in plugins/dw-question-answer/inc/templates/default folder, find the following code (somewhere at the bottom of the file):

<h3 class="dwqa-title">
 <?php 
 printf('%1$s <a href="%2$s" title="%3$s">%3$s</a> %4$s',
 __('Please login or','dwqa'),
 site_url( 'wp-login.php?action=register' ),
 __('Register','dwqa'),
 __('to Submit Answer','dwqa')
 );
 ?>
 </h3>
 <div class="login-box">
 <?php wp_login_form( array(
 'redirect' => get_post_permalink( $question_id )
 ) ); ?>
 </div>

.. and replace it with your new social login code.
Regards,

I used the article you provided http://wp.smashingmagazine.com/2012/05/29/login-wordpress-using-social-network/ to find the wp plugin https://wordpress.org/plugins/wordpress-social-login/. However this is what I used to modify the submit a question section instead of the answer section. 

dw-question-answer/inc/template-functions.php

You can find this section:

<div class="user-email">
 <label for="user-email" title="<!--?php  _e( 'Enter your email to receive notification regarding your question. Your email is safe with us and will not be published.','dwqa' ) ?>"><!--?php _e( 'Your email *','dwqa' ) ?><!--label> 
 <input type="email" name="_dwqa_anonymous_email" id="_dwqa_anonymous_email" class="large-text" placeholder="<!--?php  _e( 'Email address ...','dwqa' ) ?>" required> 
 <span><!--?php  printf( __( 'or login to submit question', 'dwqa' ), wp_login_url( apply_filters( 'the_permalink', get_permalink( get_the_ID() ) ) ) ) ?><!--span>
div>

Edit the span tag to something like this to allow for the option to register or login

 <!--?php printf( __( '
 *Please Login, ', 'dwqa' ), wp_login_url( apply_filters( 'the_permalink', get_permalink( get_the_ID() ) ) ) ) ?>
 <!--?php printf( '%1$s %3$s %4$s', __( '', 'dwqa' ), wp_registration_url(), __( 'Register,', 'dwqa' ), __( 'or provide your email to Submit Question', 'dwqa' ) ); ?>

Hello,
Thanks to Daniel, I can now provide social login to users.
The problem is, when a anonymous user clicks on "ask a question" link without social login buttons (first they don’t realize they have to register even I tell them) it redirects to default wp-login page.
How do we force them to use social buttons, or at least how do we hide "ask question" button to anonymous users?
Thanks in advance.