20+ Zyoin Interview Questions and Answers

Swapping two numbers without using a temporary variable.

• Use XOR operation to swap two numbers without using a temporary variable.

• Example: a = 5, b = 10. After swapping, a = 10, b = 5.

psvm in Java stands for public static void main, which is the entry point for a Java program.

• psvm is the method signature for the main method in Java programs.

• It is used to start the execution of a Java program.

• It must be declared as public, static, and void.

• It takes an array of strings as an argument, which can be used to pass command line arguments.

A collection is a group of related objects or data items that are stored together.

• Collections can be implemented using data structures like arrays, lists, sets, maps, etc.

• Collections allow for easy manipulation and organization of data.

• Examples of collections include arrays of integers, lists of strings, sets of unique values, and maps of key-value pairs.

Self keyword is used to refer to the instance of the class in Python. Return keyword is used to return a value from a function, while yield is used to return a generator object.

• Self keyword is used inside a class method to refer to the instance of the class.

• Return keyword is used to return a value from a function and exit the function.

• Yield keyword is used to return a generator object and pause the function execution.

• Example: def example_function(): return 10 Example: def gen...read more

Reverse individual strings in a big string with spaces

• Split the big string into an array of strings using spaces as delimiter

• Reverse each individual string in the array

• Join the reversed strings back together with spaces in between

Use a stack to check if a string is balanced without push and pop methods.

• Create an empty array to act as a stack

• Iterate through each character in the string

• If the character is an opening bracket, add it to the stack

• If the character is a closing bracket, check if the stack is empty or the top element is not the corresponding opening bracket

• If the stack is empty or the top element does not match, the string is not balanced

• If all characters are processed and the stack is empty,...read more

An automation framework is a set of guidelines, rules, and tools used for automated testing of software applications.

• Automation frameworks provide a structured way to automate testing processes, making it easier to write and maintain test scripts.

• They help in reducing manual intervention, increasing test coverage, and improving the efficiency of the testing process.

• Examples of automation frameworks include Selenium, Appium, and Robot Framework.

• Frameworks like Data-driven, Key...read more

HashMap is not thread-safe while ConcurrentHashMap is thread-safe and allows concurrent modifications.

• HashMap is not thread-safe and can lead to ConcurrentModificationException if modified concurrently.

• ConcurrentHashMap allows concurrent modifications without the need for external synchronization.

• ConcurrentHashMap achieves thread-safety by dividing the map into segments, allowing multiple threads to operate on different segments concurrently.

• ConcurrentHashMap is suitable for ...read more

Window functions are used to perform calculations across a set of rows in a table, while analytical functions compute values based on a group of rows.

• Window functions include functions like ROW_NUMBER, RANK, and LAG.

• They are used to calculate running totals, moving averages, and cumulative sums.

• Analytical functions include functions like SUM, AVG, and COUNT.

• They are used to compute aggregate values within a group of rows.

A table with foreign keys and primary keys is created to establish relationships between tables.

• Foreign keys are used to link a column in one table to the primary key of another table.

• Primary keys uniquely identify each record in a table.

• Foreign keys ensure referential integrity and maintain data consistency.

• Example: Creating a 'Orders' table with a foreign key 'customer_id' referencing the 'Customers' table's primary key.

Azure template is a JSON file that defines the resources needed for an Azure solution.

• Azure template is used for deploying and managing Azure resources in a declarative manner.

• It allows you to define the infrastructure and configuration of your Azure resources in a single file.

• Templates can be used to create virtual machines, storage accounts, networking resources, etc.

• Azure Resource Manager (ARM) uses templates to automate the deployment of resources.

I have extensive experience working with large datasets in various projects.

• Worked with large datasets in previous roles

• Utilized tools like SQL, Python, and R for data analysis

• Performed data cleaning, transformation, and visualization on large datasets

• Built predictive models using big data

Find the most occurred letter in a given string.

• Iterate through the string and count the occurrences of each letter

• Store the counts in a map or array

• Find the letter with the highest count

Find duplicates in an array of strings

• Iterate through the array and store each element in a hash set

• If an element is already in the hash set, it is a duplicate

• Return a list of all duplicates found

Company culture refers to the values, beliefs, and behaviors that shape the work environment.

• Company culture influences how employees interact and collaborate

• It can impact employee morale, productivity, and retention

• Examples include a focus on innovation, work-life balance, or diversity and inclusion initiatives

My expertise in accounting will benefit the company by ensuring accurate financial records and identifying areas for cost savings.

• I will maintain accurate financial records to help the company make informed decisions

• I will identify areas for cost savings and help the company reduce expenses

• I will ensure compliance with financial regulations and minimize the risk of penalties

• I will provide financial analysis and insights to help the company grow and improve profitability

Garnishments are deductions from an employee's wages to satisfy a debt or legal obligation. Leaves and PTO exceptions refer to situations where garnishments may not apply.

• Garnishments are court-ordered deductions from an employee's wages to pay off debts such as child support or tax obligations.

• Employee leaves and PTO exceptions may impact garnishment calculations, as the employee may not be receiving their full wages during these periods.

• Examples of leaves and PTO exceptions...read more

SQL query of join

• Use JOIN keyword to combine rows from two or more tables based on a related column between them

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

P&L account stands for Profit and Loss account. It is a financial statement that shows a company's revenues, expenses, and net income or loss over a specific period.

• P&L account is also known as an income statement.

• It shows the company's financial performance over a specific period.

• Revenues and gains are listed on the credit side, while expenses and losses are listed on the debit side.

• The difference between the two sides is the net income or loss.

• P&L account is used by investo...read more

SDLC stands for Software Development Life Cycle and STLC stands for Software Testing Life Cycle. API Testing is a type of software testing that involves testing APIs directly.

• SDLC is a process used by software development teams to design, develop, and test high-quality software.

• STLC is a process used by software testing teams to plan, design, execute, and report on software testing activities.

• API Testing involves testing the application programming interfaces (APIs) directly ...read more

The best way to handle escalation process is to have a clear and defined escalation path.

• Establish a clear escalation path with defined levels of authority

• Ensure all stakeholders are aware of the escalation process

• Set clear response times for each level of escalation

• Regularly review and update the escalation process

• Document all escalations and their outcomes for future reference

A program to reverse an array of strings.

• Create a function that takes an array of strings as input.

• Loop through each string in the array and reverse it.

• Return the reversed array of strings.

A program that matches a given string pattern in an array of strings.

• Use regular expressions to match the pattern

• Loop through the array of strings and check for matches

• Return the matched strings in an array

Design principle is a set of guidelines that help software developers create maintainable and scalable code.

• Design principles help in creating code that is easy to understand, modify, and maintain.

• Examples of design principles include SOLID principles, DRY (Don't Repeat Yourself), KISS (Keep It Simple, Stupid), and YAGNI (You Aren't Gonna Need It).

Project Architecture refers to the overall structure and design of a software project, including components, modules, and their interactions.

• Project Architecture defines how different components of a software project are organized and interact with each other.

• It includes decisions on technologies, frameworks, databases, and communication protocols to be used.

• Common architectural patterns include MVC (Model-View-Controller), Microservices, and Layered Architecture.

• Project Arch...read more

I would begin by introducing myself and the purpose of the facilitation. Then, I would engage the participants in an interactive activity to encourage participation and collaboration.

• Introduce myself and the purpose of the facilitation

• Engage participants in an interactive activity

• Encourage participation and collaboration

• Provide opportunities for reflection and feedback