Digital Technologies Flashcards

A student notices her program sometimes gives wrong answers because of rounding decimal numbers. This is MOST likely caused by:

Answer: Floating-point precision limitations

Floating-point numbers cannot represent every decimal value exactly in binary, which can cause small rounding errors in calculations.

Which of the following sorting algorithms repeatedly finds the minimum element and places it at the beginning?

Answer: Selection sort

Selection sort scans the unsorted portion of the list, selects the smallest element, and swaps it into its correct position at the front.

In cybersecurity, what does '2FA' stand for?

Answer: Two-Factor Authentication

2FA (Two-Factor Authentication) requires users to provide two different types of verification before accessing an account, increasing security.

Which of the following BEST describes an algorithm?

Answer: A step-by-step set of instructions to solve a problem

An algorithm is a finite, ordered set of well-defined instructions designed to perform a task or solve a problem.

What is the main advantage of using a 'relational database' over a flat-file database?

Answer: It links related data across multiple tables, reducing duplication

A relational database organizes data into linked tables, which eliminates redundancy and makes it easier to query and maintain large datasets.

Which unit measures processor speed?

Answer: Gigahertz (GHz)

Processor (CPU) speed is measured in Hertz (Hz) — typically Gigahertz (GHz) — which indicates how many clock cycles per second the processor can execute.

A student wants her website to look good on both phones and desktop computers. Which design approach should she use?

Answer: Responsive web design

Responsive web design uses flexible grids and media queries to adapt the layout automatically to different screen sizes and devices.