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Application Scaling and Performance Optimization

Description: This quiz is designed to assess your knowledge of application scaling and performance optimization techniques. It covers topics such as horizontal and vertical scaling, load balancing, caching, and performance monitoring.
Number of Questions: 15
Created by:
Tags: application scaling performance optimization horizontal scaling vertical scaling load balancing caching performance monitoring
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Which of the following is a horizontal scaling technique?

  1. Adding more RAM to a single server

  2. Adding more CPUs to a single server

  3. Distributing the workload across multiple servers

  4. Upgrading the operating system on a single server

Show answer
Correct Option: C
Explanation:

Horizontal scaling involves adding more servers to the system to handle the increased workload, thereby distributing the load across multiple machines.

Which of the following is a vertical scaling technique?

  1. Adding more RAM to a single server

  2. Adding more CPUs to a single server

  3. Distributing the workload across multiple servers

  4. Upgrading the operating system on a single server

Show answer
Correct Option: A
Explanation:

Vertical scaling involves upgrading the hardware of a single server to improve its performance.

Which of the following is a load balancing algorithm?

  1. Round-robin

  2. Least connections

  3. Weighted round-robin

  4. All of the above

Show answer
Correct Option: D
Explanation:

Round-robin, least connections, and weighted round-robin are all load balancing algorithms used to distribute traffic across multiple servers.

What is the purpose of caching?

  1. To reduce the number of requests to the database

  2. To improve the performance of the application

  3. To reduce the bandwidth usage

  4. All of the above

Show answer
Correct Option: D
Explanation:

Caching is used to store frequently accessed data in memory to reduce the number of requests to the database, improve the performance of the application, and reduce bandwidth usage.

Which of the following is a performance monitoring tool?

  1. New Relic

  2. AppDynamics

  3. Dynatrace

  4. All of the above

Show answer
Correct Option: D
Explanation:

New Relic, AppDynamics, and Dynatrace are all performance monitoring tools used to monitor the performance of applications and identify performance bottlenecks.

What is the difference between horizontal and vertical scaling?

  1. Horizontal scaling involves adding more servers to the system, while vertical scaling involves upgrading the hardware of a single server.

  2. Horizontal scaling involves distributing the workload across multiple servers, while vertical scaling involves adding more RAM to a single server.

  3. Horizontal scaling involves adding more CPUs to a single server, while vertical scaling involves distributing the workload across multiple servers.

  4. Horizontal scaling involves upgrading the operating system on a single server, while vertical scaling involves adding more RAM to a single server.

Show answer
Correct Option: A
Explanation:

Horizontal scaling involves adding more servers to the system to handle the increased workload, while vertical scaling involves upgrading the hardware of a single server to improve its performance.

Which of the following is a benefit of horizontal scaling?

  1. Increased scalability

  2. Improved performance

  3. Reduced costs

  4. All of the above

Show answer
Correct Option: D
Explanation:

Horizontal scaling offers increased scalability, improved performance, and reduced costs by distributing the workload across multiple servers.

Which of the following is a benefit of vertical scaling?

  1. Increased scalability

  2. Improved performance

  3. Reduced costs

  4. None of the above

Show answer
Correct Option: B
Explanation:

Vertical scaling offers improved performance by upgrading the hardware of a single server.

Which of the following is a disadvantage of horizontal scaling?

  1. Increased complexity

  2. Increased costs

  3. Reduced performance

  4. All of the above

Show answer
Correct Option: D
Explanation:

Horizontal scaling can lead to increased complexity, increased costs, and reduced performance due to the need to manage multiple servers.

Which of the following is a disadvantage of vertical scaling?

  1. Limited scalability

  2. Increased costs

  3. Reduced performance

  4. All of the above

Show answer
Correct Option: A
Explanation:

Vertical scaling has limited scalability as it is limited by the capacity of a single server.

Which of the following is a best practice for performance optimization?

  1. Use a CDN to reduce latency

  2. Minify and compress CSS and JavaScript files

  3. Use a database caching mechanism

  4. All of the above

Show answer
Correct Option: D
Explanation:

Using a CDN to reduce latency, minifying and compressing CSS and JavaScript files, and using a database caching mechanism are all best practices for performance optimization.

What is the purpose of a CDN?

  1. To reduce latency

  2. To improve performance

  3. To reduce bandwidth usage

  4. All of the above

Show answer
Correct Option: D
Explanation:

A CDN (Content Delivery Network) is used to reduce latency, improve performance, and reduce bandwidth usage by caching content on multiple servers located in different geographic locations.

What is the purpose of minifying and compressing CSS and JavaScript files?

  1. To reduce the size of the files

  2. To improve the performance of the application

  3. To reduce bandwidth usage

  4. All of the above

Show answer
Correct Option: D
Explanation:

Minifying and compressing CSS and JavaScript files reduces the size of the files, improves the performance of the application, and reduces bandwidth usage.

What is the purpose of a database caching mechanism?

  1. To reduce the number of requests to the database

  2. To improve the performance of the application

  3. To reduce bandwidth usage

  4. All of the above

Show answer
Correct Option: D
Explanation:

A database caching mechanism is used to reduce the number of requests to the database, improve the performance of the application, and reduce bandwidth usage by storing frequently accessed data in memory.

What is the difference between horizontal and vertical scaling?

  1. Horizontal scaling involves adding more servers to the system, while vertical scaling involves upgrading the hardware of a single server.

  2. Horizontal scaling involves distributing the workload across multiple servers, while vertical scaling involves adding more RAM to a single server.

  3. Horizontal scaling involves adding more CPUs to a single server, while vertical scaling involves distributing the workload across multiple servers.

  4. Horizontal scaling involves upgrading the operating system on a single server, while vertical scaling involves adding more RAM to a single server.

Show answer
Correct Option: A
Explanation:

Horizontal scaling involves adding more servers to the system to handle the increased workload, while vertical scaling involves upgrading the hardware of a single server to improve its performance.

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