Virtusa Consulting Services Interview Questions, Process, and Tips

Q1. Types of Promises
Ans. 
Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.
• Promises can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.

• Promises can be created using the Promise constructor or by using async/await syntax.
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Q2. Difference between useState and useEffect
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useState is used to manage state in functional components, while useEffect is used to perform side effects in functional components.
• useState is used to declare state variables in functional components.

• useEffect is used to perform side effects in functional components, such as data fetching, subscriptions, or manually changing the DOM.

• useState does not trigger re-renders, while useEffect can be used to trigger re-render...read more
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Q3. What is Callback hell
Ans. 
Callback hell is a situation where multiple nested callbacks make the code difficult to read and maintain.
• Occurs when multiple asynchronous operations are nested within each other

• Leads to deeply nested code structure which is hard to understand

• Can be avoided by using Promises, async/await, or modularizing code
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Q4. Difference between traditional function and arrow function
Ans. 
Traditional functions are defined using the function keyword, while arrow functions are defined using a concise syntax with =>.
• Traditional functions are hoisted, while arrow functions are not.

• Arrow functions do not have their own 'this' keyword, they inherit it from the parent scope.

• Arrow functions are more concise and easier to read compared to traditional functions.

• Traditional functions are better for methods in obje...read more
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Q5. Usecase to create counter in react
Ans. 
Creating a counter in React to increment and decrement a value.
• Create a state variable to store the count value

• Use setState to update the count value

• Render the count value in the component

• Add buttons to increment and decrement the count value
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Q6. Program to find frequency of letters in a string
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Program to find frequency of letters in a string
• Create an object to store the frequency of each letter

• Loop through the string and increment the count of each letter in the object

• Convert the object into an array of strings with letter and frequency pairs
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Q7. Program to find if substring is present in a given string without using predefined functions
Ans. 
Iterate through the given string to check if the substring is present.
• Iterate through the given string and check if each character matches the first character of the substring.

• If a match is found, check the subsequent characters to see if they form the substring.

• Return true if the entire substring is found within the given string, otherwise return false.
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First round was mcq. It was difficult.

2 problems to be solved of any language of our choice in 1 hour time.

Q1. They asked questions from whatever in resume.
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Q2. Multithreading in Java
Ans. 
Multithreading in Java allows multiple threads to execute concurrently, improving performance and responsiveness.
• Multithreading is achieved in Java by extending the Thread class or implementing the Runnable interface.

• Threads can be started using the start() method and controlled using methods like join(), sleep(), and interrupt().

• Synchronization is important to prevent race conditions and ensure thread safety, which ca...read more
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Q1. ES6 features and promises
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Q1. What are the core responsibilities of PMO?
Ans. 
Core responsibilities of PMO include project governance, portfolio management, resource management, and process improvement.
• Project governance to ensure projects align with organizational goals and standards

• Portfolio management to prioritize projects based on strategic objectives

• Resource management to allocate resources effectively across projects

• Process improvement to enhance project delivery and efficiency
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Q2. What do you understand by SOW?
Ans. 
SOW stands for Statement of Work, a document that defines project-specific activities, deliverables, and timelines.
• SOW outlines project scope, objectives, and responsibilities of all parties involved.

• It includes detailed descriptions of project deliverables, acceptance criteria, and milestones.

• SOW also specifies project timeline, budget, resources, and any assumptions or constraints.

• It serves as a contract between the ...read more
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Q1. Technical question about OBIEE
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Q2. Technical Questions about OBIEE
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How much salary will you take

Logical, quant, reasoning ,verbal ability

Q1. BUbble sort question
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