7 Questions
Which of the following best describes a two-dimensional array?
A collection of data records represented as rows and columns
What is the purpose of using two subscripts to index a two-dimensional array?
To represent the row and column of a specific element
Which of the following is a characteristic of a two-dimensional array?
All elements must be of the same type
Which of the following accurately describes the characteristics of a stack?
A stack retrieves items in the same order they are inserted.
What is the purpose of the 'push()' method in a stack?
To push an item onto a stack.
Which of the following applications uses a stack?
A web browser's back button.
In the given example, what is the value of variable X after executing 'X = Numbers.pop()' for the first time?
3
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.
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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