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I applied via Naukri.com and was interviewed in Mar 2021. There was 1 interview round.
To connect a component to Redux store, we use the connect function from the react-redux library.
Import the connect function from react-redux.
Use the connect function to wrap the component and connect it to the Redux store.
The connect function takes two parameters: mapStateToProps and mapDispatchToProps.
mapStateToProps is a function that maps the state from the Redux store to the component's props.
mapDispatchToProps is ...
Context API is a way to share data between components without passing props down manually.
Context API provides a way to pass data through the component tree without having to pass props down manually at every level.
It is useful for sharing data that needs to be accessed by many components at different levels of the tree.
Initial state can be set in Context API using the createContext() function.
There is no need to have ...
Yes, it is mandatory for Reducer to have an initial state.
Initial state defines the starting point of the state tree.
It helps in defining the shape of the state tree.
It is used to set default values for the state properties.
It is also used to reset the state to its initial values.
Example: const initialState = { count: 0 };
Example: const initialState = { name: '', age: 0 };
Minimum coverage for an app and code pushed to production/master branch while deployment.
Minimum coverage for an app depends on the project requirements and complexity.
Generally, a coverage of 80% or higher is considered good.
Code pushed to production/master branch should be thoroughly tested and reviewed.
Continuous integration and deployment can help automate this process.
Examples of tools for code coverage include Je
React re-renders just the part of the page that has changed, thanks to its virtual DOM.
React uses a virtual DOM to track changes in the UI.
When a component's state or props change, React compares the virtual DOM with the real DOM and updates only the necessary parts.
This approach improves performance by minimizing the number of DOM manipulations.
React's diffing algorithm efficiently determines the minimal set of change
Service Workers are scripts that run in the background and can intercept network requests, cache or modify responses.
Offline support for web applications
Push notifications
Background synchronization
Reduced network usage and faster page loads
Progressive Web Apps (PWA)
Redux-Saga is a middleware for Redux that handles side effects. Actions can be dispatched from components using mapDispatchToProps.
Redux-Saga is used to handle side effects like API calls and asynchronous actions.
It uses generator functions to make asynchronous code look synchronous.
Sagas listen for specific actions and perform tasks based on those actions.
To dispatch actions from components, use mapDispatchToProps to ...
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I applied via LinkedIn and was interviewed in Sep 2020. There were 3 interview rounds.
Finally block will always execute, even if an exception is thrown in the try or catch block.
Finally block is used to execute code that must always run, regardless of whether an exception was thrown or not.
If an exception is thrown in the try or catch block, the finally block will still execute.
Finally block is often used to release resources like file handles, database connections, etc.
I applied via Naukri.com and was interviewed in Nov 2020. There were 3 interview rounds.
I applied via Referral and was interviewed before Nov 2021. There were 2 interview rounds.
I applied via Naukri.com and was interviewed in Feb 2021. There were 3 interview rounds.
I applied via Referral and was interviewed before Mar 2021. There were 3 interview rounds.
I applied via Referral and was interviewed before Jul 2020. There was 1 interview round.
To add users in data administration, follow these steps:
Log in to the data administration system
Navigate to the user management section
Click on the 'Add User' button
Fill in the required user details such as name, email, and password
Assign appropriate roles and permissions to the user
Save the changes and the user will be added to the system
Libraries for electrical and instrumentation requirements can be created by following a structured approach.
Identify the requirements and specifications of the library
Design the library structure and components
Develop and test the library
Document the library for ease of use and maintenance
Continuously update and improve the library based on feedback and changes in requirements
Examples: National Instruments LabVIEW libr
I applied via Referral and was interviewed in Feb 2021. There were 3 interview rounds.
I applied via Referral and was interviewed before Jun 2021. There were 3 interview rounds.
Functions return a value while procedures do not in Oracle.
Functions are used to perform a specific task and return a value.
Procedures are used to perform a specific task but do not return a value.
Functions can be used in SQL statements while procedures cannot.
Functions can be called from within procedures while procedures cannot be called from within functions.
Cursor is a pointer to a private SQL area that stores information about processing a specific SELECT or DML statement.
Attributes include %FOUND, %NOTFOUND, %ROWCOUNT, %ISOPEN, %BULK_ROWCOUNT, %BULK_EXCEPTIONS
Used to fetch and manipulate data from a result set
Can be declared and used in PL/SQL blocks
Example: OPEN cursor_name FOR SELECT * FROM table_name WHERE column_name = value;
Removing duplicate records in SQL
Use SELECT DISTINCT to retrieve unique records
Use GROUP BY to group records by a specific column
Use HAVING to filter out groups with more than one record
Use DELETE to remove duplicate records from the table
Packages in Oracle provide modularity, encapsulation, and reusability of code.
Packages group related procedures, functions, and variables together.
Packages provide a namespace for the objects they contain, avoiding naming conflicts.
Packages can be compiled and stored in the database for efficient execution.
Packages can be granted privileges, allowing controlled access to their contents.
Packages can be versioned and upg...
I applied via Referral and was interviewed in Mar 2021. There were 3 interview rounds.
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