What happens if a method is called on an object that does not define it but its prototype does?
- The method will throw an error
- The method will be executed using the prototype's implementation
- The method will be executed using the object's implementation
- The method will call the constructor of the object
If a method is called on an object that does not define it but its prototype does, the method will be executed using the prototype's implementation. This is a key feature of prototype-based inheritance in JavaScript.
In Google Cloud, which load balancer is suitable for distributing traffic globally across multiple regions?
- Global Load Balancer
- Regional Load Balancer
- Internal Load Balancer
- Network Load Balancer
Understanding the capabilities of different load balancers in Google Cloud is essential for designing resilient and efficient architectures that can serve users worldwide. Google Cloud's Global Load Balancer is a key component for achieving global scalability and high availability.
_______ is a key feature of Cloud Deployment Manager that allows users to manage deployments as code.
- Infrastructure as Code
- Software Development Kit
- Container Orchestration
- Graphical User Interface
Infrastructure as Code (IaC) is a fundamental concept in modern cloud computing, allowing for automation, consistency, and scalability in infrastructure management.
What are the limitations of using the spread operator for deep cloning complex objects?
- It does not handle circular references well.
- It only works for primitive data types.
- It cannot clone objects with prototype chains.
- It cannot clone functions.
The spread operator is limited in deep cloning when dealing with circular references, making it less suitable for complex object structures. Circular references can result in infinite loops during cloning.
________ tools are crucial in analyzing and removing unused code through tree shaking.
- Babel
- Linter
- Bundler
- Minifier
Bundlers play a key role in tree shaking. They are responsible for analyzing the dependencies between modules, identifying unused code, and removing it during the build process. Common bundlers like Webpack and Rollup are often configured to perform tree shaking to optimize the final bundle size.
What is tail call optimization in recursive functions and how is it handled in ES6?
- Tail call optimization is a technique where the JavaScript engine optimizes recursive functions to avoid stack overflow errors. In ES6, tail call optimization is not explicitly mandated, but certain engine implementations may provide it.
- Tail call optimization in ES6 can be achieved through the use of proper coding practices, such as making the recursive call the last operation in the function and ensuring no additional processing is performed after the recursive call.
- ES6 introduces the concept of proper tail calls (PTC), allowing some recursive functions to be optimized for tail calls. This optimization is not universally supported across all JavaScript engines.
- Tail call optimization is automatically applied to all recursive functions in ES6, ensuring that stack overflow errors are mitigated, and the recursive calls are optimized for better performance.
Proper tail calls in ES6 involve making the recursive call the last operation in a function. While not all recursive calls benefit from tail call optimization, adhering to PTC principles can enhance performance in situations where tail call optimization is applied.
In ES6, which method is commonly used as a higher-order function for arrays?
- map()
- concat()
- reduce()
- slice()
The map() method in ES6 is commonly used as a higher-order function for arrays, allowing the transformation of each element with a provided function.
What distinguishes the Symbol.iterator property in an iterable?
- It uniquely identifies the iterable object
- It defines the iteration logic of the iterable
- It represents the number of iterations
- It is used to check if an object is iterable
In ES6, the Symbol.iterator property is a special symbol used to define the default iterator for an object. The value assigned to this symbol is a function that returns the iterator object, providing the logic for iterating over the object's elements. This allows customizing the iteration behavior for user-defined objects.
Can Promises help in avoiding callback hell in asynchronous JavaScript code?
- TRUE
- FALSE
- Only in specific cases
- Depends on the browser
Promises play a crucial role in avoiding callback hell in asynchronous JavaScript code. By using promises, you can chain asynchronous operations more cleanly, making the code more readable and maintainable. Option A is correct because Promises are indeed effective in this context.
In Cloud CDN, what is the purpose of the origin server?
- To provide the original source of the content that gets cached and delivered by the CDN.
- To handle user authentication and authorization.
- To manage DNS and routing for content requests.
- To perform load balancing across different servers.
In a CDN architecture, the origin server is crucial as it holds the original content that is then cached and delivered by the CDN nodes to ensure efficient and quick access for users.
Virtual machines allow users to run multiple _______ systems on a single physical server.
- operating
- network
- databases
- containers
Running multiple operating systems on a single physical server through virtual machines enhances resource utilization, isolation, and flexibility, making it a key concept in virtualization and cloud computing.
What is the purpose of the Cloud Shell Editor in Google Cloud Shell?
- To edit files directly within the Google Cloud Shell environment
- To visualize cloud infrastructure
- To manage virtual machines
- To deploy applications
The Cloud Shell Editor allows users to edit files directly within the Google Cloud Shell environment, streamlining development workflows and reducing the need for additional tools.