Explanation

• Interference occurs when two waves overlap or cross each other.
• The waves may produce a stronger wave (constructive interference) or a weaker wave (destructive interference).
• It is a fundamental property of all types of waves, such as light, sound, and water waves.

Last verified on 07-07-2026

Explanation

• nPr represents the number of arrangements of r objects selected from n objects.
• In permutation, the order of objects matters.
• Different arrangements are counted as different results.
• It is used when the position or sequence is important.
• Formula: nPr = n! / (n − r)!

Last verified on 07-07-2026

Explanation

Explanation

• Aitekaaf during Ramadan is Sunnah Muakkadah (an emphasized Sunnah).
• It is highly recommended.
• It is usually observed during the last 10 days of Ramadan.
• The purpose of Aitekaaf is to devote oneself to worship, prayer, and remembrance of Allah.
• It was the regular practice of Prophet Muhammad (ﷺ).

Last verified on 07-07-2026

Explanation

• Bus, Star, and Ring are all types of network topologies.
• A network topology is the physical or logical arrangement of devices in a network.

Additional information:

• Bus Topology – All devices share a single communication cable.
• Star Topology – All devices connect to a central hub or switch.
• Ring Topology – Devices are connected in a circular loop.
• Mesh Topology – Every device connects to multiple or all other devices.
• Tree Topology – Combination of star and bus topologies.

Last verified on 07-07-2026

Explanation

• Meaning: The committee has finished its report.
• Committee is treated as a singular collective noun, so it takes has.
• Has completed is the correct present perfect tense.

Last verified on 07-07-2026

Explanation

• Scarcity means قلت
• Abundance means کثرت

Last verified on 01-07-2026

Explanation

Explanation

• "Turn over a new leaf" means to change one's behaviour for the better and start a better life.
• It is an English idiom used when someone leaves bad habits behind.
• It refers to making a fresh start with positive actions.

Last verified on 07-07-2026

Explanation

• Facial recognition is a prime example of Artificial Intelligence (AI).
• It uses AI algorithms to detect, analyze, and identify human faces.
• The technology compares facial features with stored data for identification or verification.
• It is widely used in security systems, smartphones, airports, and surveillance.

Last verified on 07-07-2026