Which construct is used by regular queues?Report an Errorlast-in, last-outfirst-in, last-outfirst-in, first-outlast-in, first-out

Step 1: Break Down the Problem

We need to identify the correct construct that describes how regular queues operate. The options provided are different types of data structures based on the order of processing elements.

Step 2: Relevant Concepts

1. LIFO (Last-In, First-Out): This construct describes stacks, where the most recently added element is the first one to be removed.
2. FIFO (First-In, First-Out): This construct describes queues, where the first element added is the first one to be removed.
3. Other combinations: Terms like "first-in, last-out" and "last-in, last-out" do not match common data structure definitions.

Step 3: Analysis and Detail

• In a queue, elements are added at the back and removed from the front.
• FIFO means that if you add elements A, B, and C in that order, then when you remove an element, A will be removed first, followed by B, and then C.

Step 4: Verify and Summarize

Since regular queues adhere to the FIFO principle, we can confirm that the correct construct for regular queues is "first-in, first-out."

Final Answer

The correct construct used by regular queues is "first-in, first-out" (FIFO).