OpenText Technologies Interview Questions and Answers

Setting up environment in Angular app, understanding pipes, async, pure/impure, Subject and BehaviorSubject in theory

• Setting up environment in Angular app involves configuring environment files for different environments like development, production, etc.

• Pipes in Angular are used for transforming data in templates. Async pipes are used for handling asynchronous data streams.

• Pure pipes are stateless and only recompute when the input values change, while impure pipes can be cal...read more

UART, SPI, and I2C are communication protocols used in embedded systems. Static and extern are keywords in object-oriented programming.

• UART stands for Universal Asynchronous Receiver/Transmitter and is used for serial communication between devices.

• SPI stands for Serial Peripheral Interface and is used for synchronous communication between devices.

• I2C stands for Inter-Integrated Circuit and is used for communication between integrated circuits.

• Static is a keyword used to defin...read more

printf is a function in C language used to print the output whereas echo is a command in shell scripting used to display the output.

• printf is a function in C language while echo is a command in shell scripting

• printf can format the output while echo cannot

• printf is faster than echo

• printf can print to a file while echo cannot

• printf requires a format string while echo does not

Microfrontend is a software architectural style where a frontend application is decomposed into smaller, more manageable pieces.

• Microfrontend allows teams to work on different parts of the frontend independently.

• Each microfrontend can be developed, tested, and deployed separately.

• Microfrontend architecture helps in scaling large frontend applications.

• Examples of microfrontend frameworks include single-spa, Webpack Module Federation, and Module Federation Plugin.

Code to load CSV file to dataframe

• Use pandas library in Python to read CSV file into a dataframe

• Specify the file path and delimiter if needed

• Handle any missing or incorrect data during loading process

A Rollup component is used to aggregate data from multiple rows into a single row.

• Rollup component is commonly used in SQL queries to perform calculations on grouped data.

• It can be used to calculate subtotals, grand totals, and other aggregate functions.

• For example, you can use a Rollup component to calculate the total sales for each region in a sales dataset.