Robert Half Assessment Test IT and Programming Concepts 4

Question 1

What does 'polymorphism' mean in object-oriented programming?

Accepted Answer

Objects of different types can be treated through a shared interface, with each responding differently

Answer

A class can only have one constructor

Answer

Two classes cannot share the same method name

Answer

A method must always return a value

Question 2

Which HTTP status code indicates a successful request?

Accepted Answer

200

Answer

404

Answer

500

Answer

301

Question 3

What is the main advantage of using a virtual machine (VM)?

Accepted Answer

It allows multiple isolated operating systems to run on one physical machine

Answer

It eliminates the need for a CPU

Answer

It doubles the RAM available to applications

Answer

It replaces the need for a network switch

Question 4

In CSS, what does the 'box model' describe?

Accepted Answer

The layout model that includes content, padding, border, and margin around elements

Answer

The 3D rendering of HTML elements

Answer

A JavaScript library for creating animations

Answer

The process of loading web fonts

Question 5

What is a 'primary key' in a relational database?

Accepted Answer

A unique identifier for each row in a table

Answer

The first column in any table

Answer

The column with the largest data values

Answer

A password used to access the database

Question 6

Which programming paradigm treats computation as the evaluation of mathematical functions and avoids changing state?

Accepted Answer

Functional Programming

Answer

Object-Oriented Programming

Answer

Procedural Programming

Answer

Event-Driven Programming

Question 7

What does SSL/TLS provide in web communications?

Accepted Answer

Encrypted and authenticated communication between a client and server

Answer

Faster page load times by compressing data

Answer

Dynamic IP address assignment for web servers

Answer

Automatic code minification for JavaScript files