ITSW 3175 D288 Back-End Programming
Access The Exact Questions for ITSW 3175 D288 Back-End Programming
💯 100% Pass Rate guaranteed
🗓️ Unlock for 1 Month
Rated 4.8/5 from over 1000+ reviews
- Unlimited Exact Practice Test Questions
- Trusted By 200 Million Students and Professors
What’s Included:
- Unlock 100 + Actual Exam Questions and Answers for ITSW 3175 D288 Back-End Programming on monthly basis
- Well-structured questions covering all topics, accompanied by organized images.
- Learn from mistakes with detailed answer explanations.
- Easy To understand explanations for all students.
Trouble sleeping before an exam? Sleep well after using our ITSW 3175 D288 Back-End Programming questions.
Free ITSW 3175 D288 Back-End Programming Questions
Describe the significance of CRUD operations in back-end development.
-
CRUD operations are only relevant for front-end development.
-
CRUD operations are fundamental for managing data in a database, allowing applications to create, read, update, and delete records.
-
CRUD operations are used to secure databases from unauthorized access.
-
CRUD operations are primarily concerned with user interface design.
Explanation
Explanation:
CRUD operations—Create, Read, Update, and Delete—form the core functionality of back-end development by enabling applications to manage data in a database. They allow developers to add new records, retrieve existing records, modify data, and remove unnecessary or outdated information. Understanding and implementing CRUD operations is essential for building functional APIs and server-side applications, as they define how the application interacts with persistent data. These operations are not limited to front-end development or security and do not pertain directly to user interface design.
Correct Answer:
CRUD operations are fundamental for managing data in a database, allowing applications to create, read, update, and delete records.
By generating front-end code for the mobile application.
-
By generating front-end code for the mobile application.
-
By providing routing and middleware support to handle HTTP requests and responses.
-
By optimizing the performance of the mobile application.
-
By managing the database schema for the application.
Explanation
Explanation:
Express.js is a web application framework for Node.js that simplifies the process of building REST APIs. It provides robust routing capabilities, allowing developers to define endpoints for handling HTTP requests such as GET, POST, PUT, and DELETE. Additionally, Express.js supports middleware functions that can process requests and responses, handle authentication, log activity, and manage errors. It does not generate front-end code, optimize mobile app performance, or manage database schemas directly; its primary role is to facilitate server-side handling of requests and responses efficiently.
Correct Answer:
By providing routing and middleware support to handle HTTP requests and responses.
MongoDB provides a function called _________ which is used for retrieval of documents from a MongoDB database.
-
db.collection.search()
-
db.collection.seek()
-
db.collection.query()
-
db.collection.find()
Explanation
Explanation:
The db.collection.find() method in MongoDB is used to retrieve documents from a collection that match specified criteria. It returns a cursor pointing to the matched documents, which can then be converted to an array or iterated over. Other options like search(), seek(), or query() are not valid methods in the MongoDB Node.js API for document retrieval. The find() method is fundamental for querying and accessing data in MongoDB collections.
Correct Answer:
db.collection.find()
Describe how code snippets enhance the learning experience in back-end development exercises.
-
Code snippets are not necessary for learning back-end development.
-
Code snippets provide concrete examples that help students understand how to implement specific functionalities in their projects.
-
Code snippets only serve as a reference for advanced developers.
-
Code snippets are used to replace the need for documentation.
Explanation
Explanation:
Code snippets play a critical role in back-end development learning by providing practical, concrete examples of how to implement specific features or operations. They allow students to see the exact syntax, structure, and flow of code in action, making abstract concepts more tangible. By experimenting with and modifying these snippets, students gain hands-on experience, reinforcing their understanding and improving their ability to write functional back-end code in real-world scenarios. Code snippets complement documentation rather than replace it and are valuable for learners at all levels, not just advanced developers.
Correct Answer:
Code snippets provide concrete examples that help students understand how to implement specific functionalities in their projects.
Which of the following best describes the purpose of Express.js in Node.js development?
-
Handling HTTP requests and responses
-
Automating server deployment
-
Generating frontend HTML templates
-
Managing database connections
Explanation
Explanation:
Express.js is a minimal and flexible Node.js framework that simplifies the process of building web servers and APIs. Its primary purpose is to handle HTTP requests and responses, providing routing, middleware support, and tools for managing client-server interactions. While it can serve static files or integrate with templating engines, it does not automate server deployment or directly manage databases. Its main role is to streamline server-side application development and request handling.
Correct Answer:
Handling HTTP requests and responses
Describe the purpose of the deleteOne() method in MongoDB.
-
The deleteOne() method creates a new document in a MongoDB collection.
-
The deleteOne() method retrieves documents from a MongoDB collection.
-
The deleteOne() method updates a document in a MongoDB collection.
-
The deleteOne() method is used to remove a single document that matches a specified filter from a MongoDB collection.
Explanation
Explanation:
The deleteOne() method in MongoDB is designed to remove a single document from a collection that meets the criteria specified in a filter object. This method ensures that only the first document matching the filter is deleted, leaving other documents unaffected. It is commonly used in scenarios where precise deletion is required, such as removing a user by username or email. It does not create, update, or retrieve documents—it solely performs targeted deletion.
Correct Answer:
The deleteOne() method is used to remove a single document that matches a specified filter from a MongoDB collection.
If a developer performs a delete operation in MongoDB and the result object indicates that 0 documents were deleted, what could this imply about the operation?
-
No documents matched the criteria for deletion
-
The operation was unsuccessful due to a connection error
-
The operation was performed on an empty database
-
The operation was successful but affected only one document
Explanation
Explanation:
When a delete operation in MongoDB returns a result indicating that 0 documents were deleted, it means that the filter criteria provided did not match any existing documents in the collection. The operation itself was successfully executed, but there were no documents that met the specified conditions to remove. This result does not indicate a connection error, nor does it imply that the database is empty unless the collection contains no documents at all. It also does not indicate partial deletion of a single document; it simply means no matches were found.
Correct Answer:
No documents matched the criteria for deletion
If a student is struggling to understand how to connect to a MongoDB database, how might they utilize code snippets from the practical exercises?
-
They should ignore the code snippets and try to write their own code from scratch.
-
They can refer to the code snippets to see a working example of how to establish a connection to MongoDB.
-
They can use the code snippets to learn about front-end development instead.
-
They should only focus on theoretical concepts without using code snippets.
Explanation
Explanation:
Code snippets from practical exercises serve as concrete examples that demonstrate correct implementation of concepts, such as establishing a connection to MongoDB. By examining these snippets, students can see how the MongoClient or Mongoose is used, understand required parameters like the database URL, and observe the workflow in action. This allows learners to replicate, modify, and experiment with the code, bridging the gap between theory and practice. Ignoring these examples or focusing only on theory would hinder learning.
Correct Answer:
They can refer to the code snippets to see a working example of how to establish a connection to MongoDB.
Describe how the countDocuments method can be useful in a back-end application.
-
The countDocuments method helps determine the number of records that meet certain criteria, which can be useful for pagination and data analysis.
-
The countDocuments method retrieves all documents in a collection.
-
The countDocuments method deletes documents from a collection.
-
The countDocuments method updates documents in a collection.
Explanation
Explanation:
In back-end applications, countDocuments() is particularly useful for understanding the size of data sets and for implementing features like pagination, where knowing the total number of matching records is necessary to divide results into pages. It can also support data analysis by quickly providing counts of documents that meet specific conditions, such as users with a certain status or orders within a date range. Unlike methods that retrieve, delete, or update documents, countDocuments() focuses solely on quantifying data without returning the full records.
Correct Answer:
The countDocuments method helps determine the number of records that meet certain criteria, which can be useful for pagination and data analysis.
If you need to update the email address of a user in a MongoDB collection, which method would you use and how would you structure the command?
-
You would use deleteOne() to remove the user and then insertOne() to add them back with the new email.
-
You would use insertOne() to add a new user with the updated email.
-
You would use find() to retrieve the user and then manually update the email.
-
You would use updateOne() with a filter to find the user and an update object to change the email.
Explanation
Explanation:
To update a specific field in a MongoDB document, the updateOne() method is the correct approach. It allows you to specify a filter to locate the target document (for example, by username or ID) and an update object using operators such as $set to modify the desired fields. This method updates only one document that matches the filter and preserves all other data, providing a safe and efficient way to make changes without deleting or re-inserting the document. Other methods like deleteOne() and insertOne() are inappropriate for updating existing fields.
Correct Answer:
You would use updateOne() with a filter to find the user and an update object to change the email.
How to Order
Select Your Exam
Click on your desired exam to open its dedicated page with resources like practice questions, flashcards, and study guides.Choose what to focus on, Your selected exam is saved for quick access Once you log in.
Subscribe
Hit the Subscribe button on the platform. With your subscription, you will enjoy unlimited access to all practice questions and resources for a full 1-month period. After the month has elapsed, you can choose to resubscribe to continue benefiting from our comprehensive exam preparation tools and resources.
Pay and unlock the practice Questions
Once your payment is processed, you’ll immediately unlock access to all practice questions tailored to your selected exam for 1 month .