Decisivedge Software Support Engineer Interview Questions and Answers

Q1. Basic Linux commands and practical programming stuff!
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Q1. Architecture of web application, out of memory error
Ans. 
The architecture of a web application can affect memory usage and cause out of memory errors.
• The architecture should be designed to minimize memory usage

• Use caching and compression techniques to reduce memory usage

• Implement garbage collection to free up memory

• Consider using a load balancer to distribute traffic and reduce memory usage on individual servers
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Q2. Client, web server, app server , database server Close connections properly
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Q1. What are your salary expectations?
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It was on sql,plsql

Q1. Basic sql questions,joins
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Q1. Strenths,weakness,salary expectation
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Q1. What are custom hooks in React, and what are their use cases? Additionally, can you provide an example of a custom hook that performs an API call and utilizes the retrieved data?
Ans. 
Custom hooks in React are reusable functions that allow you to extract component logic into separate functions for better code organization and reusability.
• Custom hooks are created using the 'use' prefix and can be used to share logic between components.

• Use cases for custom hooks include fetching data from an API, handling form state, managing local storage, and more.

• Example of a custom hook for API call: const useFetc...read more
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Q2. What is the difference between useMemo and useCallback in React?
Ans. 
useMemo is used to memoize a value, while useCallback is used to memoize a function.
• useMemo is used to memoize a value and recompute it only when its dependencies change.

• useCallback is used to memoize a callback function and prevent unnecessary re-renders.

• Example: useMemo can be used to memoize the result of a complex computation, while useCallback can be used to memoize an event handler function.
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Q3. What is the difference between class-based components and functional components in React?
Ans. 
Class-based components use ES6 classes and have lifecycle methods, while functional components are simpler and use functions.
• Class-based components use ES6 classes to create components, while functional components are created using functions.

• Class-based components have lifecycle methods like componentDidMount and componentDidUpdate, while functional components do not.

• Functional components are simpler and more lightweig...read more
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Q4. How can you implement the lifecycle of a React component in a functional component?
Ans. 
Implementing the lifecycle of a React component in a functional component
• Use the useEffect hook to replicate lifecycle methods like componentDidMount, componentDidUpdate, and componentWillUnmount

• Pass an empty array as the second argument to useEffect to mimic componentDidMount

• Pass a variable or state as the second argument to useEffect to mimic componentDidUpdate

• Return a cleanup function inside useEffect to mimic compo
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Q5. What are the various state management techniques available in React?
Ans. 
Various state management techniques in React include Context API, Redux, and local state.
• Context API: React's built-in solution for passing data through the component tree without having to pass props down manually at every level.

• Redux: A popular state management library for React applications, allowing for a centralized store to manage application state.

• Local state: Managing state within individual components using us
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Q6. What is the architecture of Redux, and what purposes do middlewares serve within it?
Ans. 
Redux is a predictable state container for JavaScript apps. Middlewares are functions that intercept actions before they reach the reducer.
• Redux follows a unidirectional data flow architecture.

• Middlewares in Redux are functions that can intercept, modify, or dispatch actions.

• Common use cases for middlewares include logging, asynchronous API calls, and handling side effects.

• Examples of popular Redux middlewares are Redu...read more
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Q7. What is hoisting in JavaScript?
Ans. 
Hoisting in JavaScript is the behavior where variable and function declarations are moved to the top of their containing scope during the compilation phase.
• Variable declarations are hoisted to the top of their scope, but not their initializations.

• Function declarations are fully hoisted, meaning they can be called before they are declared.

• Hoisting can lead to unexpected behavior if not understood properly.
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Q8. What is event bubbling in JavaScript?
Ans. 
Event bubbling is the propagation of events from the target element up through its ancestors in the DOM tree.
• Events triggered on a child element will 'bubble up' and trigger on parent elements.

• Event listeners can be attached to parent elements to handle events from multiple child elements.

• Stopping event propagation can be done using event.stopPropagation() or event.stopImmediatePropagation().
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Q9. What are block scope and function scope in JavaScript?
Ans. 
Block scope and function scope are two types of scopes in JavaScript that determine the visibility and accessibility of variables.
• Block scope refers to the visibility of variables within a block of code enclosed by curly braces. Variables declared with 'let' and 'const' have block scope.

• Function scope refers to the visibility of variables within a function. Variables declared with 'var' have function scope.

• Variables de...read more
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Q10. Have you had experience working with semantic tags in HTML?
Ans. 
Yes, I have experience working with semantic tags in HTML.
• Used semantic tags like <header>, <nav>, <main>, <section>, <article>, <aside>, <footer> for better structure and SEO.

• Understand the importance of using semantic tags for accessibility and search engine optimization.

• Semantic tags help in organizing content and making it more readable for developers and browsers.
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Q11. What are the various methods for creating an object in JavaScript?
Ans. 
Various methods for creating an object in JavaScript include object literals, constructor functions, ES6 classes, and Object.create() method.
• Object literals: var obj = { key: value };

• Constructor functions: function ObjectName() { this.key = value; } var obj = new ObjectName();

• ES6 classes: class ClassName { constructor() { this.key = value; } } var obj = new ClassName();

• Object.create() method: var obj = Object.create(pr
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Q12. What are the differences between shallow copy and deep copy in JavaScript?
Ans. 
Shallow copy only copies the references of nested objects, while deep copy creates new copies of nested objects.
• Shallow copy creates a new object but does not create copies of nested objects, only copies their references.

• Deep copy creates a new object and also creates new copies of all nested objects.

• Shallow copy can be achieved using Object.assign() or spread operator, while deep copy can be achieved using JSON.parse(
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Q13. What will be the output of the following JavaScript code fragment: `const a; function test() { console.log(a); }; test();`?
Ans. 
The code will throw an error because 'a' is declared but not initialized.
• The code will result in a ReferenceError because 'a' is declared but not assigned a value.

• Variables declared with 'const' must be initialized at the time of declaration.

• Initializing 'a' with a value before calling test() will prevent the error.
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Q14. How can you use CSS to arrange elements in a row and column layout?
Ans. 
CSS can be used to arrange elements in a row and column layout using flexbox or grid layout properties.
• Use display: flex; for a row layout and display: flex; flex-direction: column; for a column layout

• Use justify-content and align-items properties to align items in the main axis and cross axis respectively

• For grid layout, use display: grid; and grid-template-columns or grid-template-rows to define the layout
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Q15. Have you utilized CSS preprocessors, and if so, which ones?
Ans. 
Yes, I have utilized CSS preprocessors such as SASS and LESS.
• I have experience using SASS to streamline my CSS workflow by utilizing variables, mixins, and nesting.

• I have also worked with LESS to improve code organization and maintainability through features like variables and functions.
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Q16. If I have assigned different colors to an ID and a class and applied both to the same element, which color will be applied based on CSS specificity precedence?
Ans. 
The color applied will be based on the specificity of the selector, with ID having higher specificity than class.
• ID has higher specificity than class in CSS

• Color applied will be based on the selector with higher specificity

• Example: If ID selector has color red and class selector has color blue, the color applied will be red
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Q1. Everything Regarding python
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Q1. Everything regarding AI/ML/DL with example
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Q1. Most situation-based questions
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Any ideas for an aptitude test?

Q1. You have a good network connection.
Ans. 
Yes as g good network connection
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Q2. Which individuals are currently employed?
Ans. 
The current employees include software developers, project managers, quality assurance analysts, and technical support specialists.
• Software developers

• Project managers

• Quality assurance analysts

• Technical support specialists
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What is education in place?

What is a SQL Server?

Effective communication and any suggestion.

Q1. What is your name?
Ans. 
My name is John Doe.
• Full name is John Doe

• Common name in English-speaking countries

• No middle name or initial
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Q2. What is your educational background?
Ans. 
I have a Bachelor's degree in Computer Science from XYZ University.
• Bachelor's degree in Computer Science

• Graduated from XYZ University

• Specialized in software development

• Took courses in programming languages, algorithms, and software engineering
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Q1. What type of work does the Deloitte company engage in?
Ans. 
Deloitte is a multinational professional services network that provides consulting, audit, tax, and advisory services.
• Deloitte engages in consulting services for various industries

• They provide audit and assurance services to ensure financial accuracy

• The company offers tax services to help clients navigate complex tax regulations

• Deloitte also provides advisory services to help businesses improve performance and manage r
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Q2. What type of work does Deloitte engage in?
Ans. 
Deloitte engages in consulting, audit, tax, and advisory services for clients in various industries.
• Consulting services for businesses

• Audit services for financial statements

• Tax services for individuals and corporations

• Advisory services for strategy and operations

• Industry-specific services such as healthcare, technology, and financial services
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Q1. What is your father's name?
Ans. 
My father's name is John Smith.
• Father's name is John Smith

• He goes by the name John

• His full name is John Smith
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Q2. What is your father's name?
Ans. 
My father's name is John Smith.
• Father's first name is John.

• Father's last name is Smith.

• Full name is John Smith.
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Engage with any assignment provided.

Please provide any assignments you have.

It was a simple Aptitude test designed to test your english proficiency and your quantitative skills.

Q1. Multiple questions meant to test your english communication proficiency
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There were 2 coding questions. The level of questions were not very high. The languages available for the round were Python, Java, C++, C, C#.

Q1. Please Introduce yourself
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Q2. What project did you work on in your final year?
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Q3. Do you have any connections in the industry?
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Q4. Did you undergo any Internships?
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