Explanation

• Full Form: Structured Query Language
• SQL is the standard language used to store, retrieve, update, and manage data in relational databases.

Additional information:

• Designed by: Donald D. Chamberlin & Raymond F. Boyce
• First appeared: 1974
• Latest ISO Standard: SQL:2016 (December 2016)
• Main SQL Commands: SELECT, INSERT, UPDATE, DELETE, CREATE

Last verified on 22-07-2026

Explanation

• LAN is ideal for connecting computers in closely located buildings, such as within a campus or office block.
• LAN stands for Local Area Network.
• It offers high speed and cost-effective connectivity over short distances.

Last verified on 19-04-2026

Explanation

• Hazrat Abu Ubaidah bin al-Jarrah (RA) was one of the Ashra Mubashra.
• He was given the title Ameen-ul-Ummat (Trustee of the Ummah).
• He was known for honesty, trustworthiness, and leadership.
• He played an important role in Islamic conquests in Syria.
• He was among the closest companions of the Prophet (PBUH).

Last verified on 28-04-2026

Explanation

• Headquarters: Washington, D.C., USA
• Founded: 27 December 1945
• Members: 190 countries
• Official language: English
• Purpose: Global financial stability & loans support

Last verified on 24-06-2026

Explanation

• AI stands for Artificial Intelligence.
• It refers to machines that can think, learn, and make decisions like humans.
• AI is widely used in computers, mobile apps, and robotics.
• It helps in tasks like voice recognition, image detection, and automation.
• This is used in 5th generation computers.

Last verified on 19-04-2026

Explanation

• The SI unit of sound intensity is watt per square meter (W/m²).
• Sound intensity is the amount of sound power passing through a unit area.
• It shows how strong or weak a sound wave is at a particular point.
• Sound intensity decreases as the distance from the source increases.
• Decibel (dB) is used to measure sound intensity level, not the actual intensity

Last verified on 20-07-2026

Explanation

• Finland is called the "Land of a Thousand Lakes".
• Because it has over 188,000 lakes.
• It covering about 10% of its land area.
• It is a Nordic country located in Northern Europe.

Additional information:

• Land of the Rising Sun: Japan
• Land of the Midnight Sun: Norway
• Land of Fire and Ice: Iceland
• Land of White Elephant: Thailand

Last verified on 03-07-2026

Explanation

• A Modem (Modulator-Demodulator) converts digital signals into analog signals and vice versa.
• It is used to connect computers to the internet via telephone lines or other networks.

Additional information:

• Switch – connects multiple devices in a network
• Hub – basic network connector
• Repeater – boosts signal strength
• Router – directs internet traffic

Last verified on 19-04-2026

Explanation

• The Berlin Wall fell on 9 November 1989.
• It separated East Germany and West Germany during the Cold War.
• The fall symbolized the end of division in Europe.
• It marked the beginning of the end of the Cold War.
• Germany was officially reunified on 3 October 1990.

Additional information:

• Start of construction → 13 August 1961
• Length of wall → 155 km
• Height → 3.6 meters

Last verified on 20-04-2026

Explanation

• Ctrl + N is to open a new document in MS Word.

Additional information:

• Ctrl + M -- Indent the paragraph.
• Ctrl + B -- Bold highlighted selection.
• Ctrl + D -- Font options.
• Alt + F -- File menu options in the current program.
• Alt + E -- Edits options in the current program.

Last verified on 19-04-2026