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?

<p>A stack retrieves items in the same order they are inserted. (B)</p> Signup and view all the answers

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

<p>To push an item onto a stack. (C)</p> Signup and view all the answers

Which of the following applications uses a stack?

<p>A web browser's back button. (A)</p> 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?

<p>3 (A)</p> Signup and view all the answers

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.

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