20+ Calfus Interview Questions and Answers

SAM scope includes software inventory, license compliance, usage tracking. Standard process involves discovery, normalization, optimization. Effective management requires policies, tools, regular audits.

• Scope of SAM includes software inventory, license compliance, and usage tracking.

• Standard process involves discovery of all software assets, normalization of data, and optimization of licenses.

• Effective management of SAM requires implementing policies, utilizing tools for trac...read more

I would use a middleware to handle the integration of different REST APIs.

• Identify the endpoints of the different REST APIs

• Create a middleware that can handle requests and responses from the different APIs

• Map the endpoints of the different APIs to the middleware

• Use the middleware to handle requests and responses from the different APIs

Unstructured data can be converted to structured data by using techniques such as data mining, natural language processing, and machine learning.

• Identify the relevant data points and attributes

• Use data mining techniques to extract patterns and relationships

• Apply natural language processing to extract meaning from text

• Use machine learning algorithms to classify and categorize data

• Transform the data into a structured format such as a database or spreadsheet

A pick rule determines how items are picked from a warehouse location, while a putaway rule determines where items are stored in the warehouse.

• Pick rule dictates the order in which items are picked from a location for an order fulfillment process.

• Putaway rule determines where items are stored in the warehouse after being received.

• Pick rule focuses on optimizing the picking process for efficiency and accuracy.

• Putaway rule focuses on optimizing storage space and organization wi...read more

Microservices is an architectural approach to building applications as a collection of small, independent services.

• Microservices break down a large application into smaller, independent services that can be developed, deployed, and scaled independently.

• Each microservice is responsible for a specific business capability and communicates with other microservices through APIs.

• Microservices architecture promotes agility, scalability, and resilience.

• Examples of companies that use ...read more

Query to find third highest salary of employee

• Use ORDER BY and LIMIT to select the third highest salary

• Join the employee table with salary table to get the salary information

• Exclude duplicate salaries using DISTINCT keyword

Types of label printing modes include direct thermal, thermal transfer, and inkjet.

• Direct thermal printing uses heat-sensitive paper to produce images.

• Thermal transfer printing uses a ribbon to transfer ink onto the label.

• Inkjet printing uses liquid ink to create images on the label.

Lambda expression to find and sort even numbers using streams

• Use filter() method to find even numbers

• Use sorted() method to sort the even numbers in ascending order

• Use collect() method to collect the sorted even numbers into a list

• Lambda expression: list.stream().filter(n -> n % 2 == 0).sorted().collect(Collectors.toList())

Spark increment data load is a process of loading only the new or updated data into an existing dataset.

• It helps in reducing the processing time and resources required for loading the entire dataset.

• It involves identifying the changes in the source data and only loading those changes into the target dataset.

• Spark provides various APIs and tools to perform incremental data loading such as Delta Lake and Structured Streaming.

• Example: Loading only the new sales data into a sales...read more

I handle SAM process end to end by ensuring proper software asset management from procurement to retirement.

• Developing and implementing SAM policies and procedures

• Regularly auditing software licenses and usage

• Managing software procurement and vendor relationships

• Ensuring compliance with software license agreements

• Retiring software licenses and assets properly

• Training staff on SAM best practices

Tungsten is a project in Spark that provides a high-level API for distributed data processing.

• Tungsten optimizes Spark's execution engine by using memory management and binary processing.

• It improves performance by reducing garbage collection overhead and CPU usage.

• Tungsten also provides a new columnar storage format called Catalyst that improves query performance.

• Example: Tungsten can be used to process large datasets in parallel across a cluster of machines.

• Example: Tungsten...read more

Veeva migration activities involve transferring data and configurations from one Veeva instance to another.

• Veeva migration typically includes migrating data such as accounts, contacts, activities, and configurations like custom fields, page layouts, and workflows.

• Data mapping is crucial in Veeva migration to ensure that data is accurately transferred between systems.

• Validation and testing are important steps in Veeva migration to ensure data integrity and system functionality...read more

To read file name in Spark, use the 'input_file_name' function.

• Use 'input_file_name' function in Spark to read file name.

• This function returns the name of the file being processed.

• Example: df.select(input_file_name().alias('filename')).show()

• This will show the file name in a new column named 'filename'.

Spark configurations are settings that determine how Spark applications run on a cluster.

• Spark configurations can be set using command-line arguments, properties files, or programmatically in code.

• Configurations can control various aspects of Spark, such as memory usage, parallelism, and logging.

• Examples of Spark configurations include spark.executor.memory, spark.driver.cores, and spark.eventLog.enabled.

Broadcast join is a type of join operation in distributed computing where a small table is broadcasted to all nodes for joining with a larger table.

• Broadcast join is used in distributed computing to optimize join operations.

• It involves broadcasting a small table to all nodes in a cluster.

• The small table is then joined with a larger table on each node.

• This reduces the amount of data that needs to be shuffled across the network.

• Broadcast join is useful when the small table can ...read more

Serialization is the process of converting data into a format that can be stored or transmitted.

• In Spark, serialization is used to convert data into a format that can be sent over the network or stored in memory.

• Spark supports two types of serialization: Java serialization and Kryo serialization.

• Kryo serialization is faster and more efficient than Java serialization.

• Serialization is important in Spark because it allows data to be transferred between nodes in a cluster.

• Seriali...read more

A program to reverse a string

• Create an empty string to store the reversed string

• Loop through the original string from the end to the beginning

• Add each character to the new string

• Return the new string

Profile defines the baseline permissions for a user, while permission set grants additional permissions to a user.

• Profiles are assigned to users at the time of user creation, while permission sets can be assigned at any time.

• Profiles control access to objects, fields, and records, while permission sets grant additional permissions beyond the profile settings.

• Profiles are one-size-fits-all, while permission sets can be tailored to specific user needs.

• Users can have only one pr...read more

Catalyst optimizer is a tool used in computer programming to improve the performance of code by optimizing the execution process.

• It is used in programming languages like Python, Scala, and Spark.

• It analyzes the code and makes changes to improve its efficiency.

• It can improve the speed of code execution and reduce memory usage.

• Examples include PySpark's Catalyst optimizer and Scala's Catalyst optimizer.

Solid design principles are important in Spring Boot to ensure maintainability and scalability of the application.

• Single Responsibility Principle (SRP) - each class should have only one responsibility

• Open/Closed Principle (OCP) - classes should be open for extension but closed for modification

• Liskov Substitution Principle (LSP) - subclasses should be able to replace their parent classes without affecting the behavior of the program

• Interface Segregation Principle (ISP) - clien...read more

BGP attributes are used to make routing decisions in Border Gateway Protocol networks.

• BGP attributes are used to influence the best path selection process in BGP.

• Examples of BGP attributes include AS Path, Next Hop, Local Preference, and Weight.

• AS Path attribute shows the path that the route has taken through different autonomous systems.

• Next Hop attribute specifies the next router to reach for a particular destination.

• Local Preference attribute is used to influence outbound ...read more

Data storage best practices include regular backups, encryption, access control, and data retention policies.

• Regularly backup data to prevent loss in case of system failure or cyber attacks.

• Encrypt sensitive data to protect it from unauthorized access.

• Implement access control measures to ensure only authorized personnel can access certain data.

• Establish data retention policies to determine how long data should be stored and when it should be deleted.

• Consider using cloud stora...read more

Spark submit command to run a Scala application on a cluster

• Include the path to the application jar file

• Specify the main class of the application

• Provide any necessary arguments or options

• Specify the cluster manager and the number of executors

• Example: spark-submit --class com.example.Main --master yarn --num-executors 4 /path/to/application.jar arg1 arg2

VIP and Pool Creation in F5 involves configuring virtual servers and pools to manage traffic.

• Create a virtual server with a unique IP address and port number

• Associate the virtual server with a pool of servers that will handle the incoming traffic

• Configure health monitors to check the status of the servers in the pool

• Set up load balancing methods such as round robin or least connections

• Test the configuration to ensure proper traffic distribution