Understanding Algorithms and Sorting Techniques

The video introduces algorithms, focusing on sorting and graph search problems. It explains the importance of efficient algorithms in computer science, using examples like Selection Sort and Merge Sort for sorting, and Dijkstra's algorithm for graph search. The video highlights the computational complexity of these algorithms and their practical applications.

What is an algorithm in the context of computer science?

• A software application

• A set of specific steps to solve a problem

• A programming language

• A type of computer hardware

Which of the following is a characteristic of Selection Sort?

• It has a complexity of N log N

• It is a recursive algorithm

• It is the most efficient sorting algorithm

• It involves nested loops

What is the main disadvantage of Selection Sort?

• It requires a lot of memory

• It has a high time complexity of N squared

• It cannot sort large arrays

• It is not stable

How does Merge Sort improve efficiency over Selection Sort?

• By using less memory

• By sorting in place

• By splitting and merging arrays

• By using a single loop

What is the time complexity of Merge Sort?

• N squared

• N log N

• N factorial

• N

What is a graph in computer science?

• A network of nodes connected by lines

• A type of sorting algorithm

• A programming language

• A data storage format

What is the purpose of Dijkstra's algorithm?

• To compress data

• To find the shortest path in a graph

• To encrypt information

• To sort arrays

How does Dijkstra's algorithm determine the shortest path?

• By using a brute force approach

• By checking all possible paths

• By sorting nodes alphabetically

• By iteratively selecting the node with the lowest cost

What is the improved time complexity of Dijkstra's algorithm?

• N factorial

• N squared

• N log N

• N log N plus the number of lines

Why are algorithms crucial in computer science?

• They are used to design hardware

• They help in writing software applications

• They are a type of programming language

• They provide efficient solutions to computational problems