Ques:- What is the difference between a Choice and a List?
Ques:- Explain .bind() vs .live() vs .delegate() vs .on()
Asked In :-
itworx,
Right Answer:
- **.bind()**: Attaches event handlers to the selected elements, but does not work for dynamically added elements.
- **.live()**: Attaches event handlers to elements that match the selector, even if they are added to the DOM later. (Deprecated in jQuery 1.7 and removed in 1.9)
- **.delegate()**: Attaches event handlers to a parent element, which can handle events for its child elements, including those added later. (Deprecated in jQuery 3.0)
- **.on()**: The preferred method to attach event handlers; can be used for both static and dynamically added elements, and can also handle events for child elements when used with event delegation.
- **.bind()**: Attaches event handlers to the selected elements, but does not work for dynamically added elements.
- **.live()**: Attaches event handlers to elements that match the selector, even if they are added to the DOM later. (Deprecated in jQuery 1.7 and removed in 1.9)
- **.delegate()**: Attaches event handlers to a parent element, which can handle events for its child elements, including those added later. (Deprecated in jQuery 3.0)
- **.on()**: The preferred method to attach event handlers; can be used for both static and dynamically added elements, and can also handle events for child elements when used with event delegation.
Comments
All these 4 jQuery methods are used for attaching events to selectors or elements. But they all are different from each other.
.bind(): This is the easiest and quick method to bind events. But the issue with bind() is that it doesn't work for elements added dynamically that matches the same selector. bind() only attach events to the current elements not future element. Above that it also has performance issues when dealing with a large selection.
.live(): This method overcomes the disadvantage of bind(). It works for dynamically added elements or future elements. Because of its poor performance on large pages, this method is deprecated as of jQuery 1.7 and you should stop using it. Chaining is not properly supported using this method.
.delegate(): The .delegate() method behaves in a similar fashion to the .live() method, but instead of attaching the selector/event information to the document, you can choose where it is anchored and it also supports chaining.
.on(): Since live was deprecated with 1.7, so new method was introduced named ".on()". This method provides all the goodness of previous 3 methods and it brings uniformity for attaching event handlers.
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Ques:- What are the Important Components of Struts?
Ques:- What are the negative indexes in Python?
Asked In :-
NIHILENT LIMITED, Allied Softech, Shaligram InfoTech Inc, Ranosys Technologies, Argil DX, Quick Release, HiLabs, transunion, etsy, icddr,b,
Ques:- How do you check the file existence and their types in python ?
Asked In :-
First Zen, InRhythm Solutions, Falcon Autotech, G S Lab, Qseap Technologies, Sigmoid Analytics, Elcamino Software, WhiteSnow Software, Vaayu, Synthesis Healthcare (Chennai),
Right Answer:
You can check file existence and their types in Python using the `os` module. Here's how:
```python
import os
file_path = 'path/to/your/file'
# Check if the file exists
if os.path.exists(file_path):
print("File exists.")
# Check if it's a file or directory
if os.path.isfile(file_path):
print("It's a file.")
elif os.path.isdir(file_path):
print("It's a directory.")
else:
print("File does not exist.")
```
You can check file existence and their types in Python using the `os` module. Here's how:
```python
import os
file_path = 'path/to/your/file'
# Check if the file exists
if os.path.exists(file_path):
print("File exists.")
# Check if it's a file or directory
if os.path.isfile(file_path):
print("It's a file.")
elif os.path.isdir(file_path):
print("It's a directory.")
else:
print("File does not exist.")
```
Ques:- What are the key features of Python?
Asked In :-
Media Agility, Zenon, chetu, iOPEX, Tekskills, NetProphets Cyberworks, Concerto Software, Ebaotech, Kcloud Technologies, Emertxe,
Ques:- What are the inheritance styles in django?
Asked In :-
TVISHA TECHNOLOGIES PVT, sciative, Blackbuck Insights, Estuate, Kyro, Invenger Technologies, Sankey Solutions, MG Motor, Olive Crypto Systems, Aggregate Intelligence,
Right Answer:
Django supports three inheritance styles:
1. **Abstract Base Classes**: A base class that doesn't create a database table but allows child classes to inherit fields and methods.
2. **Multi-table Inheritance**: Each model has its own database table, and Django creates a one-to-one relationship between the parent and child models.
3. **Proxy Models**: Allows you to create a new model class that behaves like the original model but can have different behavior or additional methods without creating a new database table.
Django supports three inheritance styles:
1. **Abstract Base Classes**: A base class that doesn't create a database table but allows child classes to inherit fields and methods.
2. **Multi-table Inheritance**: Each model has its own database table, and Django creates a one-to-one relationship between the parent and child models.
3. **Proxy Models**: Allows you to create a new model class that behaves like the original model but can have different behavior or additional methods without creating a new database table.
Ques:- How can you delete a file in Python?
Asked In :-
Thales Group, Nalsoft, Technoforte Software, Accelya, BridgeLabz Solutions, Thinkcore Technologies, Cittabase Solutions, Harman, sandvik, scientific games,
Comments
In order to delete files in Python, you must first import the OS module, then use the os.remove() function.
Ques:- What are outliers and how do you handle them in data analysis
Asked In :-
Fluid AI, Trigent Software, Itobuz Technologies, RANDSTAD INDIA PVT, GOQii Technologies, Dhruvsoft Services, Radicle Software, Webvillee Technology, Fission Infotech, Noesys Consulting,
Right Answer:
Outliers are data points that significantly differ from the rest of the dataset. They can skew results and affect statistical analyses. To handle outliers, you can:
1. Identify them using methods like the IQR (Interquartile Range) or Z-scores.
2. Remove them if they are errors or irrelevant.
3. Transform them using techniques like log transformation.
4. Use robust statistical methods that are less affected by outliers.
5. Analyze them separately if they provide valuable insights.
Outliers are data points that significantly differ from the rest of the dataset. They can skew results and affect statistical analyses. To handle outliers, you can:
1. Identify them using methods like the IQR (Interquartile Range) or Z-scores.
2. Remove them if they are errors or irrelevant.
3. Transform them using techniques like log transformation.
4. Use robust statistical methods that are less affected by outliers.
5. Analyze them separately if they provide valuable insights.
Ques:- What is classification analysis and how does it work
Asked In :-
Unyscape Infocom Pvt. Ltd., Xoriant Solutions Pvt Ltd, Fluid AI, Queppelin Technology Solutions, MattsenKumar Services, Protege Solutions, STIC SOFT E-SOLUTIONS, Toxsl Technologies, TNQ Technologies, Oodles Technologies,
Right Answer:
Classification analysis is a data analysis technique used to categorize data into predefined classes or groups. It works by using algorithms to learn from a training dataset, where the outcomes are known, and then applying this learned model to classify new, unseen data based on its features. Common algorithms include decision trees, logistic regression, and support vector machines.
Classification analysis is a data analysis technique used to categorize data into predefined classes or groups. It works by using algorithms to learn from a training dataset, where the outcomes are known, and then applying this learned model to classify new, unseen data based on its features. Common algorithms include decision trees, logistic regression, and support vector machines.
Ques:- What is data normalization and why is it important
Asked In :-
KRIOS Info Solutions, WSNE Consulting, MattsenKumar Services, Shipco IT, Itobuz Technologies, Fortunesoft IT Innovations, Spadeworx Software Services, Namecheap Web Services, TNQ Technologies, Define Labs,
Right Answer:
Data normalization is the process of organizing data in a database to reduce redundancy and improve data integrity. It involves structuring the data into tables and defining relationships between them. Normalization is important because it helps eliminate duplicate data, ensures data consistency, and makes it easier to maintain and update the database.
Data normalization is the process of organizing data in a database to reduce redundancy and improve data integrity. It involves structuring the data into tables and defining relationships between them. Normalization is important because it helps eliminate duplicate data, ensures data consistency, and makes it easier to maintain and update the database.
Ques:- What is the role of SQL in data analysis
Asked In :-
Unyscape Infocom Pvt. Ltd., Hidden Brains InfoTech, Queppelin Technology Solutions, Protege Solutions, Trigent Software, Itobuz Technologies, Aranca (Mumbai), Indocosmo Systems, RANDSTAD INDIA PVT, Namecheap Web Services,
Right Answer:
SQL (Structured Query Language) is used in data analysis to query, manipulate, and manage data stored in relational databases. It allows analysts to retrieve specific data, perform calculations, filter results, and aggregate information to derive insights from large datasets.
SQL (Structured Query Language) is used in data analysis to query, manipulate, and manage data stored in relational databases. It allows analysts to retrieve specific data, perform calculations, filter results, and aggregate information to derive insights from large datasets.
Ques:- What are descriptive and inferential statistics
Asked In :-
Vinove Software & Services Pvt Ltd, KRIOS Info Solutions, Shipco IT, STIC SOFT E-SOLUTIONS, Toxsl Technologies, GOQii Technologies, Namecheap Web Services, iROID Technologies, TRICON INFOTECH PVT, SWYM,
Right Answer:
Descriptive statistics summarize and describe the main features of a dataset, using measures like mean, median, mode, and standard deviation. Inferential statistics use sample data to make predictions or inferences about a larger population, often employing techniques like hypothesis testing and confidence intervals.
Descriptive statistics summarize and describe the main features of a dataset, using measures like mean, median, mode, and standard deviation. Inferential statistics use sample data to make predictions or inferences about a larger population, often employing techniques like hypothesis testing and confidence intervals.
Ques:- What are the different types of APIs
Asked In :-
Vinove Software & Services Pvt Ltd, Object Frontier Software, Hidden Brains InfoTech, AnAr Solutions, Netaxis IT Solutions (p), Walkover Web Solutions, Itobuz Technologies, Codiant Software Technologies, Infinity Labs LLP, Define Labs,
Right Answer:
The different types of APIs are:
1. **Open APIs (Public APIs)** - Available to developers and third parties.
2. **Internal APIs (Private APIs)** - Used within an organization.
3. **Partner APIs** - Shared with specific business partners.
4. **Composite APIs** - Combine multiple endpoints into a single call.
5. **Web APIs** - Accessible over the internet using HTTP/HTTPS.
The different types of APIs are:
1. **Open APIs (Public APIs)** - Available to developers and third parties.
2. **Internal APIs (Private APIs)** - Used within an organization.
3. **Partner APIs** - Shared with specific business partners.
4. **Composite APIs** - Combine multiple endpoints into a single call.
5. **Web APIs** - Accessible over the internet using HTTP/HTTPS.
Ques:- What are HTTP methods and how are they used in APIs
Asked In :-
Xoriant Solutions Pvt Ltd, KRIOS Info Solutions, Itobuz Technologies, Addweb solutions, Solace Infotech, TNQ Technologies, MatchMove India, Sun Technology Integrators, Spectra Medix India, Novalnet e-Solutions,
Right Answer:
HTTP methods are standardized request types used in APIs to perform actions on resources. The main methods are:
1. **GET**: Retrieve data from a server.
2. **POST**: Send data to a server to create a new resource.
3. **PUT**: Update an existing resource on the server.
4. **DELETE**: Remove a resource from the server.
5. **PATCH**: Apply partial modifications to a resource.
These methods define the action to be performed on the specified resource in the API.
HTTP methods are standardized request types used in APIs to perform actions on resources. The main methods are:
1. **GET**: Retrieve data from a server.
2. **POST**: Send data to a server to create a new resource.
3. **PUT**: Update an existing resource on the server.
4. **DELETE**: Remove a resource from the server.
5. **PATCH**: Apply partial modifications to a resource.
These methods define the action to be performed on the specified resource in the API.
Ques:- What are Webhooks and how do they differ from APIs
Asked In :-
AnAr Solutions, Shipco IT, Trigent Software, Toxsl Technologies, Codiant Software Technologies, Solace Infotech, Born Commerce, iROID Technologies, Dhruvsoft Services, Infinity Labs LLP,
Right Answer:
Webhooks are user-defined HTTP callbacks that are triggered by specific events in a web application, allowing real-time data transfer. They differ from APIs in that APIs require a request to be made to receive data, while webhooks automatically send data when an event occurs without needing a request.
Webhooks are user-defined HTTP callbacks that are triggered by specific events in a web application, allowing real-time data transfer. They differ from APIs in that APIs require a request to be made to receive data, while webhooks automatically send data when an event occurs without needing a request.
Ques:- What are RESTful principles and how do they apply to API design
Asked In :-
STIC SOFT E-SOLUTIONS, Addweb solutions, Dhruvsoft Services, Elite Software Solutions, QUALYS SECURITY TECHSERVICES, Tredence Analytics Solutions, Spark Infosys, Noesys Consulting, Deligence Technologies, Technostacks Infotech,
Right Answer:
RESTful principles include:
1. **Statelessness**: Each API call must contain all the information needed to understand and process the request, with no stored context on the server.
2. **Client-Server Architecture**: The client and server are separate, allowing for independent development and scalability.
3. **Uniform Interface**: A consistent way to interact with resources, typically using standard HTTP methods (GET, POST, PUT, DELETE).
4. **Resource-Based**: APIs should expose resources (data entities) through URIs, and clients interact with these resources.
5. **Representation**: Resources can be represented in various formats (like JSON or XML), and clients can request the format they prefer.
6. **Cacheability**: Responses should indicate whether they can be cached to improve performance and reduce server load.
These principles guide the design of APIs to be scalable, efficient, and easy to use.
RESTful principles include:
1. **Statelessness**: Each API call must contain all the information needed to understand and process the request, with no stored context on the server.
2. **Client-Server Architecture**: The client and server are separate, allowing for independent development and scalability.
3. **Uniform Interface**: A consistent way to interact with resources, typically using standard HTTP methods (GET, POST, PUT, DELETE).
4. **Resource-Based**: APIs should expose resources (data entities) through URIs, and clients interact with these resources.
5. **Representation**: Resources can be represented in various formats (like JSON or XML), and clients can request the format they prefer.
6. **Cacheability**: Responses should indicate whether they can be cached to improve performance and reduce server load.
These principles guide the design of APIs to be scalable, efficient, and easy to use.
Ques:- What is API versioning and why is it important
Asked In :-
DREAMORBIT SOFTECH PVT, AnAr Solutions, STIC SOFT E-SOLUTIONS, Born Commerce, LiteBreeze Infotech, Oodles Technologies, Sun Technology Integrators, Webvillee Technology, SENSEI Technologies, Deligence Technologies,
Right Answer:
API versioning is the practice of managing changes to an API by assigning version numbers to different iterations of the API. It is important because it allows developers to introduce new features or make changes without breaking existing client applications that rely on older versions, ensuring backward compatibility and a smoother transition for users.
API versioning is the practice of managing changes to an API by assigning version numbers to different iterations of the API. It is important because it allows developers to introduce new features or make changes without breaking existing client applications that rely on older versions, ensuring backward compatibility and a smoother transition for users.
