DTCC Lead Software Engineer Interview Questions and Answers

Q1. What is the difference between normal and arrow functions
Ans. 
Arrow functions are more concise and have a lexical 'this' binding compared to normal functions.
• Arrow functions do not have their own 'this' keyword, they inherit it from the parent scope.

• Arrow functions do not have their own 'arguments' object.

• Arrow functions cannot be used as constructors with 'new'.

• Arrow functions are more concise and have implicit return when no curly braces are used.
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Q2. All basic JS Questions to cover Hoisting closure
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Q3. They asked to show me an example using the API call
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Q4. Difference between forEach and Map
Ans. 
forEach is used to iterate over an array and perform a function on each element, while map creates a new array by applying a function to each element.
• forEach does not return a new array, while map does

• forEach does not modify the original array, while map creates a new array

• forEach is used for side effects, while map is used for transformation

• Example: forEach - array.forEach(item => console.log(item)), map - const newAr
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Q1. What is dependency injection
Ans. 
Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
• Dependency injection helps in achieving loose coupling between classes.

• It allows for easier testing by providing mock dependencies.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.
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Q2. What is state in react
Ans. 
State in React is a JavaScript object that stores data and determines how a component renders and behaves.
• State is mutable and can be updated using the setState() method

• State should be used for data that will change over time and affect the component's rendering

• State should not be modified directly, use setState() instead
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Q1. DS & Algo topics
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Q2. GoLang concepts
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Q1. More on Server Architectural Questions
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Q2. Questions related to database & all
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Q1. Why are you switching the job
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Q2. What is your goal in next 5years
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Q1. What is HTML and CSS?
Ans. 
HTML and CSS are markup languages used for creating and styling web pages.
• HTML stands for HyperText Markup Language and is used for structuring content on web pages.

• CSS stands for Cascading Style Sheets and is used for styling the appearance of web pages.

• HTML uses tags to define elements like headings, paragraphs, images, and links.

• CSS allows for customization of colors, fonts, layout, and other visual aspects of a web...read more
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Q2. Operating Systems, DBMS, Python
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Basic Arithmetic Aptitude , Computer Application and SQL

Q1. Create a Fitness Tracking Application
Ans. 
A fitness tracking application to monitor and track user's physical activities and progress.
• Include features like tracking steps, calories burned, distance traveled, and workout sessions.

• Allow users to set goals, view progress charts, and receive notifications for reminders.

• Integrate with wearable devices like Fitbit or Apple Watch for real-time data syncing.

• Provide social sharing options to motivate users and compete ...read more
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It continues for 15 mins

Practical Question based on case study

Q1. More about the Techno Managerial
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Q2. More about the Techno functional round
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Q3. Technical Question
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Q4. Related to Skills
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Q5. Based on work we did
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