JPMorgan Chase & Co. Software Development Engineer 3 Interview Questions and Answers

Quants, DSA, Logical, Analytical, OS, DBMS

Q1. Please introduce yourself
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Q2. Why UBS and what excited you
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Q1. What are joins in sql
Ans. 
Joins in SQL are used to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables based on a related column

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
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Q2. What is OOP features
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OOP features are key concepts in Object-Oriented Programming that include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

• Inheritance: Ability for a class to inherit properties and behavior from another class

• Polymorphism: Ability for objects to be treated as instances of their parent class or their own class

• Abstractio...read more
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Q3. Primary key , foreign key
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Q4. Exception in java
Ans. 
An exception in Java is a runtime error that disrupts the normal flow of a program.
• Exceptions are objects that are thrown when an error occurs during the execution of a program.

• They can be caught and handled using try-catch blocks.

• Common types of exceptions in Java include NullPointerException, ArrayIndexOutOfBoundsException, and IOException.
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Quant Topics: Interests, Sequence and Series along with Missing items, Time and Distance/Work,
Verbal Topics: Comprehension, Corrections, Grammar etc
CS Core Subjects: DSA, OOPS, DBMS, OS

Overall Test Difficulty was Easy-Medium

System asked to choose one of the programming languages from C, C++ or Java. (Note: You can't change the language once confirmed!)
There were 7 different coding questions along with code. You just need to debug the code to get the correct output.
DSA: Graphs (Basics), Linked Lists, Conditional Statements, and Arrays (Stack and Queue)

Overall Difficulty was Medium (tbh, it depends on the practice you have done!)

Q1. 1. Tell me about yourself 2. What tech stack(s) you have worked on? Why? Why not others? 3. SQL queries based on joins, nesting and aggregations 4. Logical reasoning questions 5. Previous internships exper...read more
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Q1. 1. Tell me about yourself 2. Why you do seek to join this company? 3. Are you comfortable working in shifts? If yes, how will you manage your time? 4. SQL queries 5. Logical question: Total number of squar...read more
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Q1. 1. Tell me about your day. Walk me through it. 2. If given a coding problem, what is your preferred language? Why? 3. Walk me through your best project in your resume. Why/How/When did you make it? 4. Tell...read more
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Work and distance, work and time

SQL server and manual test and Java

Number system and rational and proportion

Clarity on manual test and Java class

Q1. What is the software
Ans. 
Software is a set of instructions that tells a computer what to do.
• Software is a collection of programs, data, and instructions that tell a computer how to perform specific tasks.

• It can be categorized into system software, application software, and middleware.

• Examples of software include Microsoft Office, Adobe Photoshop, and Google Chrome.
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Q2. What is the white Box testing
Ans. 
White Box testing is a software testing technique that examines the internal structure and implementation of the system.
• White Box testing is also known as Clear Box testing, Glass Box testing, or Structural testing.

• It involves testing the code, logic paths, and internal components of the software.

• Test cases are designed based on the knowledge of the internal structure of the system.

• It helps in identifying errors, code ...read more
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Q3. What is the software testing
Ans. 
Software testing is the process of evaluating a software application or system to ensure it meets the specified requirements.
• Software testing is done to identify defects or errors in the software.

• It involves executing the software with test cases and comparing the actual results with expected results.

• Different types of testing include unit testing, integration testing, system testing, and acceptance testing.

• Testing can...read more
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Q1. 1. Question on Projects, Job, Contribution.
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Q2. Javascript : closures, promise
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Q3. Guess Output based questions
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Q4. Coding : Given array and target, find the index pair of elements the sum becomes target
Ans. 
Given an array and target, find the index pair of elements the sum becomes target.
• Use a hash table to store the difference between target and current element

• Check if the difference exists in the hash table

• Return the indices of the current element and the difference
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Q1. RestAPIs and Webservices
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Q2. Microservices and Spring boot
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