Gate facts & stats

Question 1

In which city does the Brandenburg Gate stand?

Accepted Answer

Berlin. The Brandenburg Gate, completed in 1791, is a neoclassical monument in the center of Berlin.

Question 2

In digital electronics, when does a two-input AND gate output 1?

Accepted Answer

When both inputs are 1. An AND gate outputs 1 only if all of its inputs are 1.

Question 3

What does a NOT gate (inverter) do to its input?

Accepted Answer

Flips it to the opposite value. A NOT gate outputs 1 when its input is 0 and 0 when its input is 1.

Question 4

The Golden Gate strait connects San Francisco Bay to which ocean?

Accepted Answer

Pacific Ocean. The Golden Gate is the narrow strait linking San Francisco Bay with the Pacific Ocean.

Question 5

Which gate design lets people pass but keeps livestock in, using a small enclosure?

Accepted Answer

Kissing gate. A kissing gate swings inside a small U- or V-shaped enclosure, so a person can slip through but animals cannot.

Question 6

What is a portcullis?

Accepted Answer

A heavy grille gate lowered vertically at a castle entrance. A portcullis is a latticed grille of wood or metal dropped down grooves to seal a castle gateway.

Question 7

The reconstructed Ishtar Gate is shown in a Berlin museum, but where was it originally built?

Accepted Answer

Babylon. The Ishtar Gate was built around 575 BC by Nebuchadnezzar II as an entrance to the city of Babylon.

Question 8

Which logic gate outputs 1 only when its two inputs are different?

Accepted Answer

XOR. XOR (exclusive OR) gives 1 when exactly one input is 1, so it detects inputs that differ.