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Master Two-Dimensional Arrays

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Questions and Answers

Which of the following best describes a two-dimensional array?

A table of 10 rows

A collection of data records represented as rows and columns (correct)

A single line of elements

A data record

What is the purpose of using two subscripts to index a two-dimensional array?

To differentiate between primitive and object types

To indicate the type of data stored in the array

To represent the row and column of a specific element (correct)

To determine the size of the array

Which of the following is a characteristic of a two-dimensional array?

The size of the array is determined by the number of rows

Elements can be of different types

The size of the array is determined by the number of columns

All elements must be of the same type (correct)

Which of the following accurately describes the characteristics of a stack?

A stack retrieves items in the same order they are inserted. Signup and view all the answers

What is the purpose of the 'push()' method in a stack?

To push an item onto a stack. Signup and view all the answers

Which of the following applications uses a stack?

A web browser's back button. Signup and view all the answers

In the given example, what is the value of variable X after executing 'X = Numbers.pop()' for the first time?

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Study Notes

Two-Dimensional Arrays

A two-dimensional array is a collection of elements arranged in rows and columns, with each element identified by two subscripts or indices.
Using two subscripts to index a two-dimensional array allows for easy access and manipulation of individual elements.

Characteristics of Two-Dimensional Arrays

A characteristic of a two-dimensional array is that it can be visualized as a table or matrix with rows and columns.

Stacks

A stack is a data structure that follows the Last-In-First-Out (LIFO) principle, meaning the last element added is the first one to be removed.
The purpose of the 'push()' method in a stack is to add an element to the top of the stack.
Applications that use stacks include recursive functions, parsing, and evaluating postfix expressions.

Stack Operations

The 'pop()' method is used to remove and return the top element from the stack.
In the given example, after executing 'X = Numbers.pop()' for the first time, the value of variable X is the topmost element that was added last to the Numbers stack.

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Description

Test your knowledge of abstract data structures with this quiz on two-dimensional arrays. Learn to describe the characteristics of two-dimensional arrays and construct algorithms using them.