Podcast
Questions and Answers
What is the term used when a user attempts to remove an element from an empty stack?
What is the term used when a user attempts to remove an element from an empty stack?
If elements '5', '6', '7', and '8' are added in a stack, what would be the correct order for their removal?
If elements '5', '6', '7', and '8' are added in a stack, what would be the correct order for their removal?
Which data structure is known for being immutable?
Which data structure is known for being immutable?
In Python, which keyword is used to define functions?
In Python, which keyword is used to define functions?
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Which brackets are used in Python to create a list?
Which brackets are used in Python to create a list?
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What is the built-in method in Python for adding an element to a list acting as a stack?
What is the built-in method in Python for adding an element to a list acting as a stack?
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What is an important characteristic that a step in an algorithm must possess?
What is an important characteristic that a step in an algorithm must possess?
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Why is measuring execution times not a good measure of efficiency?
Why is measuring execution times not a good measure of efficiency?
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In an algorithm, which element varies with the programming language and the style of the programmer?
In an algorithm, which element varies with the programming language and the style of the programmer?
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When the running time of all inputs is shortest and key operations are executed the minimum number of times, it is referred to as the ____________.
When the running time of all inputs is shortest and key operations are executed the minimum number of times, it is referred to as the ____________.
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Where does the running time of an algorithm fall when it is between worst and best cases?
Where does the running time of an algorithm fall when it is between worst and best cases?
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Which of the following is a compact, informal, and environment-independent description of a computer programming algorithm?
Which of the following is a compact, informal, and environment-independent description of a computer programming algorithm?
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What principle does a queue follow?
What principle does a queue follow?
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Which of the following is a postfix expression?
Which of the following is a postfix expression?
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What data structure is commonly used for testing a palindrome?
What data structure is commonly used for testing a palindrome?
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What is a list in terms of data structures?
What is a list in terms of data structures?
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Which of the following is a non-linear data structure?
Which of the following is a non-linear data structure?
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What operation defines the insertion in stack terminology?
What operation defines the insertion in stack terminology?
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Study Notes
Stacks and Queues
- A stack is also known as Last In First Out (LIFO).
- Removing an element from an empty stack is called Underflow.
- The order of removal in a stack is Last In First Out (LIFO).
- Elements in a stack are removed in the reverse order they were added.
Data Structures
- A tuple is an immutable data structure.
- A list is a mutable data structure.
- A list in Python is created using square brackets
[].
Functions and Lists in Python
- The keyword
defis used to define functions in Python. - To get the second element in a list called "bus", use
bus[1]. - The
append()method is used to add an element to a list (or stack).
Stacks and Queues (continued)
- Inserting an item into a stack when it's not full is called a Push operation.
- Deleting an item from a stack when it's not empty is called a Pop operation.
- A queue follows the First In First Out (FIFO) principle.
Postfix Expressions and Palindromes
- The expression
abc*+de-+is an example of a postfix expression. - A stack is used to test a palindrome.
Data Structures (continued)
- A linked list is a sequence of data elements connected to each other.
- A graph is a non-linear data structure.
Stacks (continued)
- The
Peek()function returns the top data element of the stack. - The
Push()operation inserts an element into a stack. - The
Pop()operation deletes an element from a stack.
Algorithms
- An algorithm should have unambiguous, feasible, and definite steps.
- The effectiveness of an algorithm is a measure of its performance.
Algorithm Analysis
- The running time of an algorithm can vary with the computer's processor speed.
- The number of statements in an algorithm can vary with the programming language and programmer's style.
- The best case is when the running time of an algorithm is the shortest.
- The average case is when the running time of an algorithm falls between the worst and best cases.
- Pseudocode is a compact, informal, and environment-independent description of a computer programming algorithm.
Recursion
- A stack is used to perform recursion.
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Description
Test your knowledge about stack data structure with this quiz. Questions cover topics like stack terminology, operations, and order of removal of elements.
