International Law MCQs for Judiciary

Judiciary International Law questions 1-23 of 235, with answer keys and explanations covering sources, treaties, State responsibility, recognition, jurisdiction, law of the sea, the United Nations, use of force, and human rights.

235 questions37 topics1-23 on this page

Topics in this subject

Practice judiciary exam MCQs with answers and explanations across substantive law, procedure, evidence, constitutional law, and state judicial service subjects.

  • Air and Space Law4
  • Asylum and Extradition1
  • Diplomatic and Consular Law1
  • Diplomatic Protection2
  • Dispute Settlement3
  • Environmental Law2
  • Extradition and Asylum4
  • Human Rights9
  • Human Rights and Refugee Law3
  • Immunities12
  • International Court of Justice10
  • International Criminal Law14
  • International Economic Law5
  • International Environmental Law5
  • International Humanitarian Law9
  • International Investment Law3
  • International Law and Municipal Law2
  • International Organisations4
  • International Watercourses1
  • Jurisdiction14
  • Law of the Sea22
  • Nationality4
  • Recent Developments5
  • Recognition1
  • Recognition and Non-Recognition1
  • Refugee Law2
  • Self-Determination1
  • Sources of International Law14
  • State Recognition2
  • State Responsibility15
  • State Succession5
  • Statehood and Recognition8
  • Subjects of International Law1
  • Treatment of Aliens1
  • Treaty Law24
  • United Nations10
  • Use of Force11
Question 1MediumSources of International Law

Obligations erga omnes are owed:

  1. A

    To the international community as a whole.

  2. B

    Only to the state that signed a bilateral treaty.

  3. C

    Only to private companies registered abroad.

  4. D

    Only to the Security Council.

View answer and explanation

Correct answer: A. To the international community as a whole.

Erga omnes obligations are obligations owed to the international community as a whole. The Barcelona Traction case is the classic authority for this concept.

Source note: Barcelona Traction, ICJ 1970

Question 2HardSources of International Law

When a treaty codifies customary international law, it may bind a non-party state if:

  1. A

    The treaty is printed in English.

  2. B

    The relevant rule also exists independently as custom.

  3. C

    The non-party state attended one diplomatic meeting.

  4. D

    The treaty has a long preamble.

View answer and explanation

Correct answer: B. The relevant rule also exists independently as custom.

A non-party is not bound by the treaty as treaty. It may, however, be bound by the same rule if that rule has an independent customary character.

Source note: North Sea Continental Shelf Cases, ICJ 1969

Question 3HardSources of International Law

A unilateral declaration by a state may create legal obligations when it is:

  1. A

    Only whispered in a private meeting.

  2. B

    Contrary to every peremptory norm.

  3. C

    Made publicly with an intention to be bound.

  4. D

    Made by a private citizen without authority.

View answer and explanation

Correct answer: C. Made publicly with an intention to be bound.

The Nuclear Tests cases recognise that public unilateral declarations may be legally binding where the state intends to be bound.

Source note: Nuclear Tests Cases, ICJ 1974

Question 4EasyTreaty Law

The principle pacta sunt servanda requires parties to a treaty to:

  1. A

    Withdraw from every treaty after five years.

  2. B

    Treat all treaty clauses as non-binding.

  3. C

    Apply only domestic law in treaty interpretation.

  4. D

    Perform the treaty in good faith.

View answer and explanation

Correct answer: D. Perform the treaty in good faith.

Article 26 of the VCLT states that every treaty in force is binding upon the parties and must be performed by them in good faith.

Source note: VCLT Article 26

Question 5MediumTreaty Law

Under the Vienna Convention, a state generally cannot invoke its internal law as justification for:

  1. A

    Failure to perform a treaty.

  2. B

    Negotiating a treaty.

  3. C

    Publishing a treaty text.

  4. D

    Using supplementary means of interpretation.

View answer and explanation

Correct answer: A. Failure to perform a treaty.

Article 27 VCLT prevents a state from relying on internal law to justify non-performance of treaty obligations, subject to the separate rule on manifest violation of internal law concerning competence to conclude treaties.

Source note: VCLT Article 27

Question 6EasyTreaty Law

A reservation to a treaty is impermissible when it is:

  1. A

    Compatible with the object and purpose of the treaty.

  2. B

    Incompatible with the object and purpose of the treaty.

  3. C

    Made in writing.

  4. D

    Accepted by all relevant parties where acceptance is legally required.

View answer and explanation

Correct answer: B. Incompatible with the object and purpose of the treaty.

The object and purpose test is central to the law of reservations, especially in multilateral treaties.

Source note: Reservations to the Genocide Convention Advisory Opinion, ICJ 1951; VCLT Article 19

Question 7EasyTreaty Law

The primary rule of treaty interpretation under Article 31 of the vclt combines ordinary meaning, context, and:

  1. A

    The most politically convenient meaning.

  2. B

    Only the subjective preference of one state.

  3. C

    Object and purpose.

  4. D

    Domestic precedent alone.

View answer and explanation

Correct answer: C. Object and purpose.

Article 31 requires interpretation in good faith in accordance with ordinary meaning in context and in light of object and purpose.

Source note: VCLT Article 31

Question 8MediumTreaty Law

Preparatory work under Article 32 of the vclt is best described as:

  1. A

    The only binding interpretive method.

  2. B

    A rule of state immunity.

  3. C

    A method for creating nationality.

  4. D

    A supplementary means of interpretation.

View answer and explanation

Correct answer: D. A supplementary means of interpretation.

Travaux preparatoires may confirm meaning or assist when the Article 31 analysis leaves ambiguity, obscurity, or manifest absurdity.

Source note: VCLT Article 32

Question 9MediumTreaty Law

The rule pacta tertiis nec nocent nec prosunt means that a treaty:

  1. A

    Neither creates obligations nor rights for a third state without its consent.

  2. B

    Automatically binds all neighbouring states.

  3. C

    Can never benefit any third state even with consent.

  4. D

    Applies only to private contracts.

View answer and explanation

Correct answer: A. Neither creates obligations nor rights for a third state without its consent.

Treaties are based on consent. A third state is not bound, nor generally entitled, without the legal requirements for third state obligations or rights being satisfied.

Source note: VCLT Articles 34 to 37

Question 10HardTreaty Law

Coercion of a state by the threat or use of force in concluding a treaty makes the treaty:

  1. A

    Automatically stronger.

  2. B

    Void under the Vienna Convention framework.

  3. C

    Binding only on private persons.

  4. D

    Valid if published on a government website.

View answer and explanation

Correct answer: B. Void under the Vienna Convention framework.

Article 52 VCLT treats a treaty procured by coercion of a state through threat or use of force in violation of the Charter as void.

Source note: VCLT Article 52

Question 11HardTreaty Law

A material breach of a bilateral treaty may entitle the other party to:

  1. A

    Annex the breaching state.

  2. B

    Ignore all human rights obligations permanently.

  3. C

    Invoke the breach as a ground for terminating or suspending the treaty in whole or in part.

  4. D

    Create a new state automatically.

View answer and explanation

Correct answer: C. Invoke the breach as a ground for terminating or suspending the treaty in whole or in part.

Article 60 VCLT deals with termination or suspension for material breach. The remedy is legally structured and does not authorise unrelated coercive measures.

Source note: VCLT Article 60

Question 12HardTreaty Law

The doctrine of fundamental change of circumstances is applied restrictively because:

  1. A

    Treaties are never binding.

  2. B

    Only domestic judges can interpret treaties.

  3. C

    It applies to every minor inconvenience.

  4. D

    An easy exit rule would undermine treaty stability.

View answer and explanation

Correct answer: D. An easy exit rule would undermine treaty stability.

Article 62 VCLT sets a narrow test. The doctrine protects exceptional cases without converting treaties into promises terminable on ordinary inconvenience.

Source note: VCLT Article 62

Question 13HardTreaty Law

Where successive treaties relate to the same subject matter, the legal analysis mainly concerns:

  1. A

    Priority, compatibility, and the intention of parties under the treaty framework.

  2. B

    The colour of treaty covers.

  3. C

    Private company registration.

  4. D

    Automatic extinction of custom.

View answer and explanation

Correct answer: A. Priority, compatibility, and the intention of parties under the treaty framework.

Successive treaty issues require analysis of party identity, compatibility, lex specialis, and applicable VCLT rules. They are not solved by formality alone.

Source note: VCLT Article 30

Question 14MediumTreaty Law

Provisional application of a treaty means that:

  1. A

    The treaty has no legal relevance at any stage.

  2. B

    The treaty or part of it may be applied before formal entry into force if the treaty or parties so provide.

  3. C

    Only courts may apply the treaty after final judgment.

  4. D

    It applies only to maritime boundaries.

View answer and explanation

Correct answer: B. The treaty or part of it may be applied before formal entry into force if the treaty or parties so provide.

Article 25 VCLT recognises provisional application where agreed. It is useful when states want immediate legal operation pending completion of formal requirements.

Source note: VCLT Article 25

Question 15MediumTreaty Law

Article 102 of the UN Charter requires treaty registration primarily to:

  1. A

    Make all unregistered treaties void everywhere.

  2. B

    Create territorial sovereignty.

  3. C

    Promote publicity and prevent secret treaty diplomacy.

  4. D

    Replace ratification.

View answer and explanation

Correct answer: C. Promote publicity and prevent secret treaty diplomacy.

UN Charter Article 102 is directed at transparency. Non-registration affects the ability to invoke the treaty before UN organs, but it does not by itself make the treaty void.

Source note: UN Charter Article 102

Question 16EasyStatehood and Recognition

The Montevideo criteria of statehood classically include permanent population, defined territory, government, and:

  1. A

    Membership of the Security Council.

  2. B

    A written constitution in English.

  3. C

    Recognition by every state.

  4. D

    Capacity to enter into relations with other states.

View answer and explanation

Correct answer: D. Capacity to enter into relations with other states.

The Montevideo Convention formulation is widely used as a concise statement of statehood indicators. Universal recognition is not listed as a formal criterion.

Source note: Montevideo Convention 1933

Question 17MediumStatehood and Recognition

For statehood, a defined territory means:

  1. A

    There must be a reasonably identifiable territorial base, not necessarily perfectly settled boundaries.

  2. B

    Every boundary dispute must be finally adjudicated.

  3. C

    The territory must be larger than a continent.

  4. D

    Only maritime zones matter.

View answer and explanation

Correct answer: A. There must be a reasonably identifiable territorial base, not necessarily perfectly settled boundaries.

Statehood does not require absence of all boundary disputes. The requirement is a territorial base capable of identification.

Source note: Statehood doctrine

Question 18MediumStatehood and Recognition

Under the declaratory theory of recognition, recognition by other states:

  1. A

    Is the only source of statehood.

  2. B

    Acknowledges an existing factual and legal situation rather than creating statehood by itself.

  3. C

    Always creates nationality for all residents of the world.

  4. D

    Abolishes the need for territory.

View answer and explanation

Correct answer: B. Acknowledges an existing factual and legal situation rather than creating statehood by itself.

The declaratory theory treats statehood as depending on objective criteria. Recognition is evidence and has practical effects, but it is not constitutive in itself.

Source note: Recognition doctrine

Question 19MediumStatehood and Recognition

The constitutive theory of recognition gives legal weight to:

  1. A

    Only geographical maps.

  2. B

    Domestic tax records.

  3. C

    Recognition by existing states in bringing international personality into practical operation.

  4. D

    Private contracts between individuals.

View answer and explanation

Correct answer: C. Recognition by existing states in bringing international personality into practical operation.

The constitutive view emphasises recognition as legally significant for international personality. Modern practice often reflects elements of both declaratory and constitutive reasoning.

Source note: Recognition doctrine

Question 20EasyStatehood and Recognition

Recognition of a government differs from recognition of a state because it concerns:

  1. A

    Creation of territory from nothing.

  2. B

    Only private property rights.

  3. C

    The automatic invalidity of all past treaties.

  4. D

    The authority that represents an already existing state.

View answer and explanation

Correct answer: D. The authority that represents an already existing state.

Recognition of a government addresses who speaks for the state. Recognition of a state concerns international personality of the entity itself.

Source note: Recognition doctrine

Question 21MediumStatehood and Recognition

The right of self-determination is most clearly connected with:

  1. A

    The ability of peoples to determine their political status and pursue development.

  2. B

    The right of every private company to create a state.

  3. C

    Abolition of all borders in every case.

  4. D

    Only diplomatic immunity of ministers.

View answer and explanation

Correct answer: A. The ability of peoples to determine their political status and pursue development.

Self-determination is a core principle of modern international law, especially in decolonisation and human rights contexts. Its application outside those contexts may be complex.

Source note: UN Charter; common Article 1 ICCPR and ICESCR

Question 22MediumState Succession

The clean slate doctrine is most closely associated with:

  1. A

    A new state being free from all customary international law.

  2. B

    Newly independent states not being automatically bound by every predecessor treaty.

  3. C

    Automatic invalidity of all human rights obligations.

  4. D

    Permanent denial of nationality to all residents.

View answer and explanation

Correct answer: B. Newly independent states not being automatically bound by every predecessor treaty.

The clean slate idea concerns treaty succession, especially in decolonisation. It does not mean the new state is outside custom or general international law.

Source note: State succession doctrine

Question 23HardState Succession

Boundary treaties are often treated differently in succession because stability of boundaries is linked with:

  1. A

    Private contract pricing.

  2. B

    The number of diplomatic passports.

  3. C

    Certainty, peace, and territorial order.

  4. D

    Automatic state immunity.

View answer and explanation

Correct answer: C. Certainty, peace, and territorial order.

Territorial and boundary arrangements often show stronger continuity because international law values stability of frontiers and peaceful relations.

Source note: State succession and boundary stability doctrine