Sinch Senior Manager Interview Questions and Answers

Q1. Asked to write a program to check whether string is valid or not. String consists of only three kind of special characters "(), [], {}". We need to return true if all special characters are in correct for...read more
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Q2. What is useRef hook used for?
Ans. 
useRef hook is used to persist a mutable value across renders without causing a re-render.
• Used to store mutable values that do not trigger re-renders.

• Commonly used for accessing DOM elements or storing previous values.

• Does not cause a re-render when the value changes.
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Q3. What are the best practices to avoid rerenders and to improve performance
Ans. 
Use memoization, virtual DOM, and shouldComponentUpdate to avoid unnecessary rerenders and improve performance.
• Implement memoization to store the result of expensive function calls and avoid recalculating them.

• Use virtual DOM to efficiently update only the parts of the UI that have changed.

• Override shouldComponentUpdate to prevent unnecessary rerenders by comparing current and next props/state.
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Q4. What are callbacks, Promises, async await
Ans. 
Callbacks, Promises, async await are asynchronous programming concepts in JavaScript.
• Callbacks are functions passed as arguments to another function to be executed later.

• Promises are objects representing the eventual completion or failure of an asynchronous operation.

• async await is a syntax for writing asynchronous code that looks synchronous, making it easier to read and maintain.

• Example: Using a callback to handle th...read more
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Asked to design an API, which has multiple hits of timestamps. We have to store that and also built a method to get the counter given a timestamp. Find all such timestamps which has occured between the given timestamp and 5 minutes.

Q1. Tell me about your last company experience.
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Q2. Explain your role and responsibilities with more in debt so that can understand more of your weightage.
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Q1. Job duties last performed
Ans. 
As a Senior Executive, my job duties included overseeing daily operations, managing staff, developing strategies, and ensuring company goals were met.
• Managed a team of employees to ensure productivity and efficiency

• Developed and implemented strategies to achieve company objectives

• Analyzed performance metrics and made data-driven decisions

• Collaborated with other departments to streamline processes and improve communicat
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Q2. What is the expectation
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The expectation is to meet and exceed the goals and objectives set by the organization.
• Demonstrate a clear understanding of the organization's goals and objectives

• Develop a strategic plan to achieve those goals

• Lead and motivate teams to execute the plan effectively

• Regularly monitor progress and make adjustments as needed

• Communicate effectively with stakeholders to ensure alignment and support
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Q1. Basic questions of related role.
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Q1. Deeper technology-related questions and simple coding
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Was asked to profile companies

Q1. How will you approach a market research problem
Ans. 
I will approach a market research problem by first defining the objectives, conducting thorough research, analyzing data, and presenting actionable insights.
• Define the research objectives clearly to ensure focus

• Conduct thorough research using a mix of qualitative and quantitative methods

• Analyze the data collected to identify trends, patterns, and insights

• Present actionable recommendations based on the findings

• Stay upda
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Basic DSA Question on dynamic Programming

Q1. Basic Go Fundamentals
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Q2. Different design patterns in Go Lang
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Go Lang supports various design patterns like Singleton, Factory, Observer, etc.
• Singleton pattern ensures a class has only one instance and provides a global point of access. Example: sync.Once in Go.

• Factory pattern creates objects without specifying the exact class to create. Example: encoding/json package in Go.

• Observer pattern defines a one-to-many dependency between objects so that when one object changes state, al...read more
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