Explanation:

Question Hour

• It is during this one hour that Members of Parliament ask questions of ministers and hold them accountable for the functioning of their ministries. 
• The questions that MPs ask are designed to elicit information and trigger suitable action by ministries.
• Induces transparency: The questions asked have exposed financial irregularities and brought data and information regarding government functioning to the public domain. 
• The live broadcast of Question Hour has become one the most visible aspects of parliamentary functioning.
• Question Hour in both Houses is held on all days of the session.  

Exceptions: 

• There is no Question Hour on the day the President addresses MPs from both Houses in the Central Hall. 
• The President’s speech takes place at the beginning of a new Lok Sabha and on the first day of a new Parliament year. 
• Question Hour is not scheduled either on the day the Finance Minister presents the Budget. 
• The presiding officers of the two houses are the final authority with respect to the conduct of Question Hour.

Zero Hour

• While Question Hour is strictly regulated, Zero Hour is an Indian parliamentary innovation which is not mentioned in the rules of procedure. 
• Usually Question Hour is the first hour of a parliamentary sitting. In 2014, Rajya Sabha Chairman shifted Question Hour in the House from 11 am to 12 noon. The move was to prevent the disruption of Question Hour.

Hence both statements are correct.