Mettl Technical Aptitude 4

Question 1

Which gate produces a HIGH output only when ALL inputs are HIGH?

Accepted Answer

AND gate

Answer

An AND gate outputs HIGH (1) only when all of its inputs are HIGH, otherwise it outputs LOW.

Question 2

A spring with a spring constant of 200 N/m is compressed by 0.05 m. How much potential energy is stored?

Accepted Answer

0.25 J

Answer

Spring PE = ½kx² = ½ × 200 × (0.05)² = ½ × 200 × 0.0025 = 0.25 J.

Question 3

In object-oriented programming, what is 'encapsulation'?

Accepted Answer

Bundling data and methods that operate on that data within one unit

Answer

Encapsulation bundles data (attributes) and the methods that act on it into a single class, hiding internal details.

Question 4

Which material is classified as a semiconductor?

Accepted Answer

Silicon

Answer

Silicon is a semiconductor — its conductivity falls between conductors and insulators and can be controlled by doping.

Question 5

Two resistors of 6Ω and 3Ω are connected in parallel. What is the total resistance?

Accepted Answer

2 Ω

Answer

For parallel resistors: 1/R = 1/6 + 1/3 = 1/6 + 2/6 = 3/6 = 1/2, so R = 2 Ω.

Mettl Practice Test