[CARBONDATA-3791] Frequently Asked Question doc changes

Why is this PR needed?
faq.md docis not as per code
unwanted FAQs are present.

What changes were proposed in this PR?
changed faq.md doc as per code
removed the unwanted changes.

This closes #3741
diff --git a/docs/faq.md b/docs/faq.md
index f3f0a6d..a330e24 100644
--- a/docs/faq.md
+++ b/docs/faq.md
@@ -42,7 +42,6 @@
 - [Failed to load data on the cluster](#failed-to-load-data-on-the-cluster)
 - [Failed to insert data on the cluster](#failed-to-insert-data-on-the-cluster)
 - [Failed to execute Concurrent Operations(Load,Insert,Update) on table by multiple workers](#failed-to-execute-concurrent-operations-on-table-by-multiple-workers)
-- [Failed to create a table with a single numeric column](#failed-to-create-a-table-with-a-single-numeric-column)
 - [Failed to create_index and drop index is also not working](#failed-to-create-index-and-drop-index-is-also-not-working)
 
 ## 
@@ -279,7 +278,7 @@
   2. Use the following command :
 
   ```
-  mvn -Pspark-2.4 -Dspark.version {yourSparkVersion} clean package
+  mvn -Pspark-2.4 -Dspark.version={yourSparkVersion} clean package
   ```
   
 Note : Refrain from using "mvn clean package" without specifying the profile.
@@ -388,7 +387,7 @@
 
    Follow the steps to ensure the following configuration files are consistent across all the nodes:
 
-   1. Copy the core-site.xml, hive-site.xml, yarn-site,carbon.properties files from the master node to all the other nodes in the cluster.
+   1. Copy the core-site.xml, hive-site.xml, yarn-site, carbon.properties files from the master node to all the other nodes in the cluster.
       For example, you can use scp to copy this file to all the nodes.
 
       Note : Set the path to hdfs ddl in carbon.properties in the master node.
@@ -419,7 +418,7 @@
 
    Follow the steps to ensure the following configuration files are consistent across all the nodes:
 
-   1. Copy the core-site.xml, hive-site.xml, yarn-site,carbon.properties files from the master node to all the other nodes in the cluster.
+   1. Copy the core-site.xml, hive-site.xml, yarn-site, carbon.properties files from the master node to all the other nodes in the cluster.
       For example, you can use scp to copy this file to all the nodes.
 
       Note : Set the path to hdfs ddl in carbon.properties in the master node.
@@ -444,24 +443,6 @@
 
   Worker must wait for the query execution to complete and the table to release the lock for another query execution to succeed.
 
-## Failed to create a table with a single numeric column
-
-  **Symptom**
-
-  Execution fails with the following exception :
-
-  ```
-  Table creation fails.
-  ```
-
-  **Possible Cause**
-
-  Behaviour not supported.
-
-  **Procedure**
-
-  A single column that can be considered as dimension is mandatory for table creation.
-
 ## Failed to create index and drop index is also not working
   
   **Symptom**