Answers for "get_posts query ids"

get_posts category

$defaults_param = array(
				'numberposts'      	=> -1,
				'post_type'        	=> 'post',
				'category' 			=> 40 ,
				'suppress_filters'	=> false
			);
$get_featured_post = get_posts($defaults_param);

wp_query post by category id

$args=array(
    'posts_per_page' => 50, 
    'post_type' => 'my_custom_type'
    'cat' => $cat_id,
);
$wp_query = new WP_Query( $args );