Tuesday, 13 October 2026

Consider the following statements about a quantum bit (qubit):

1. 1.A qubit can exist in a quantum superposition of basis states.
2. 2.Measurement generally produces a definite classical outcome.
3. 3.A qubit is simply a classical bit operating at a higher clock frequency.

Which of the statements given above are correct?

Consider the following statements about geostationary satellites:

1. 1.They orbit in the equatorial plane.
2. 2.Their orbital period is approximately equal to Earth's rotational period.
3. 3.They appear fixed over one longitude to a ground observer under ideal conditions.

Which of the statements given above are correct?

An Advanced Persistent Threat (APT) is best characterized by:

Consider the following statements about antigen and nucleic-acid based diagnostic tests:

1. 1.An antigen test detects a component of a pathogen or other target rather than its genetic sequence.
2. 2.A nucleic-acid amplification test can detect genetic material by amplification.
3. 3.A positive nucleic-acid test necessarily proves that a person is infectious at the time of testing.

Which of the statements given above are correct?

Consider the following statements regarding a smart border-surveillance system:

1. 1.It may combine ground sensors, electro-optical/infrared cameras and radar.
2. 2.Sensor fusion can reduce dependence on any single sensor.
3. 3.Such systems make physical terrain, human patrols and command decisions entirely unnecessary.

Which of the statements given above are correct?

Consider the following statements about gene drives:

1. 1.They can bias inheritance of a genetic element.
2. 2.They are necessarily restricted to laboratory populations and cannot raise ecological concerns.
3. 3.Their potential spread through populations creates biosafety and governance questions.

A neutron moderator in a thermal nuclear reactor primarily:

Consider the following scenario: A generative AI system is supplied with a malicious instruction hidden inside retrieved documents, causing it to ignore higher-priority instructions and reveal sensitive information. This is most closely associated with:

A critical military communication network faces simultaneous GPS interference, phishing of administrators, malicious code inserted through a vendor update and a drone-based physical reconnaissance attempt. Which security architecture best reflects the required response?

Consider the following statements about a modern layered air-defence architecture:

1. 1.Long-range systems can engage threats at greater distances than short-range systems.
2. 2.Networked sensors can provide tracks to different effectors.
3. 3.Layering means that every interceptor must have identical range and guidance characteristics.