Dr B R Ambedkar had said ‘the Directive Principles are like the instrument of instructions, which were issued to the Governor-General and to the Governors of the colonies of India by the British Government under the Government of India Act of 1935.’
What is called Directive Principles is merely another name for the instrument of instructions. The only difference is that they are instructions to the legislature and the executive.

Both 1 and 2 are correct.
Statement 1: Acts like Maternity Benefit Act or its recent amendment have been enacted in the spirit of the DPSP (Article 42).
Statement 2: These are socialist principles which draw their moorings from the history of economic thought in India. India upholds an economic system based on the principles of equity, fairness and justice, and therefore, such rights (provisions) are crucial to ensure labour welfare.

The 42nd Amendment Act of 1976 added four new Directive Principles to the original list. They require the State:
(i) To secure opportunities for healthy development of children (Article 39).
(ii) To promote equal justice and to provide free legal aid to the poor (Article 39 A).
(iii) To take steps to secure the participation of workers in the management of industries (Article 43 A).
(iv) To protect and improve the environment and to safeguard forests and wild life (Article 48 A)

Statement 1 is correct.
A Uniform Civil Code is one that would provide for one law for the entire country, applicable to all religious communities in their personal matters such as marriage, divorce, inheritance, adoption etc. Article 44 of the Constitution lays down that the state shall endeavour to secure a Uniform Civil Code for the citizens throughout the territory of India.
Article 44 is one of the directive principles. These, as defined in Article 37, are not justiciable (not enforceable by any court) but the principles laid down therein are fundamental in governance. Fundamental rights are enforceable in a court of law. While Article 44 uses the words “state shall endeavour”, other Articles in the ‘Directive Principles’ chapter use words such as “in particular strive”; “shall in particular direct its policy”; “shall be obligation of the state” etc. Article 43 mentions “state shall endeavour by suitable legislation” while the phrase “by suitable legislation” is absent in Article 44. All this implies that the duty of the state is greater in other directive principles than in Article 44.

Statement 1 is correct.
If they are violated one cannot approach the court and seek their enforcement. Therefore, the government (Central, state and local) cannot be compelled to implement them.
The Directive Principles, though non-justiciable in nature, help the courts in examining and determining the constitutional validity of a law.
The Supreme Court has ruled many a times that in determining the constitutionality of any law, if a court finds that the law in question seeks to give effect to a Directive Principle, it may consider such law to be ‘reasonable’ in relation to Article 14 (equality before law) or Article 19 (six freedoms) and thus save such law from unconstitutionality.