Paytm Software Development Engineer Intern Interview Questions and Answers

The DSA round happens with pseudo code

Q1. Question asked from my resume
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Q2. How I implemented everything
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Q1. Why you want to join
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Q2. Where do you see yourself in five years
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First round basic aptitude questions like profit loss,work time etc

Q1. Tell about youself
Ans. 
I am a software engineer with 5 years of experience in developing web applications using Java, Spring, and Angular.
• 5 years of experience in software development

• Proficient in Java, Spring, and Angular

• Strong problem-solving skills

• Experience in developing web applications

• Good team player
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Q2. Oops concepts and basic implemenation
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Q3. Reverse a number
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Reverse a number by converting it to a string and then reversing the string
• Convert the number to a string

• Reverse the string

• Convert the reversed string back to a number
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Q1. Why this company
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Q2. Are you okay with relocation
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Simple aptitude questions and multiple choice coding questions were asked.

Q1. Explanation about project
Ans. 
I have worked on a project to develop a mobile application for tracking fitness activities and providing personalized workout plans.
• Developed user-friendly interface for inputting and tracking fitness data

• Implemented algorithms to generate personalized workout plans based on user's goals and progress

• Integrated with wearable devices to automatically sync activity data

• Conducted thorough testing to ensure accuracy and rel...read more
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Q2. SQL queries which were easy
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Q3. Linked list and arrays
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Q1. One leetcode easy-medium problem
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Q2. Java, springboot and oops question
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Q1. Project related questions
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Q2. System design questions
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The topic was -> "One nation one election"

Q1. What is a String pool in Java?
Ans. 
String pool in Java is a pool of unique strings stored in memory to optimize memory usage.
• String pool is a part of Java's memory where unique string literals are stored.

• When a new string is created, Java checks if it already exists in the pool to save memory.

• Strings created using double quotes are added to the pool, while those created using 'new' keyword are not.

• Example: String str1 = "hello"; String str2 = "hello"; /...read more
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Q2. Explain different types of exception in Java.
Ans. 
Java has checked and unchecked exceptions. Checked exceptions must be handled at compile time, while unchecked exceptions do not need to be handled explicitly.
• Checked exceptions: Must be caught or declared in the method signature. Example: IOException, SQLException

• Unchecked exceptions: Do not need to be caught or declared. Example: NullPointerException, ArrayIndexOutOfBoundsException
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