Wells Fargo Senior Software Engineer Specialist 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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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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General apti questions

Work-life balance and career progression

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. Full Java deep knowledge including oops concepts then rest APIs then have some basic knowledge of microservices then spring boot all the things have mastery
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Q1. What is fast wrto performance?hashmap or treemap and why
Ans. 
HashMap is faster than TreeMap wrto performance due to its constant time complexity for most operations.
• HashMap has O(1) time complexity for most operations while TreeMap has O(log n) time complexity.

• HashMap is implemented using an array of buckets while TreeMap is implemented using a Red-Black Tree.

• HashMap is preferred for frequent read operations while TreeMap is preferred for frequent write operations.

• HashMap is uno...read more
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Q2. Can I write a try catch block inside a catch Block
Ans. 
Yes, it is possible to write a try catch block inside a catch block.
• This is called nested try-catch block.

• It is useful when we want to handle different types of exceptions in different ways.

• Example: try { //code } catch (ExceptionType1 e1) { try { //code } catch (ExceptionType2 e2) { //code } } }

• It is important to avoid excessive nesting as it can make the code difficult to read and maintain.
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Q3. Are exceptions can be written in a catch block seperated by commas,?
Ans. 
Yes, multiple exceptions can be caught in a single catch block separated by commas.
• Multiple exceptions can be caught in a single catch block separated by commas.

• This can be useful when handling different types of exceptions in a similar way.

• For example: catch (IOException | SQLException ex) { // handle exception }
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Q4. Hashmap internal working
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Q1. Why this and what all offers you are having It was a normal telephone call
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Round duration - 90 minutes
Round difficulty - Medium

2 programming questions, MCQs based on OS, DBMS, OOPS and web fundamentals

Q1. 
Search in a 2D Matrix
Given a 2D matrix MAT of size M x N, where M and N represent the number of rows and columns respectively. Each row is sorted in non-decreasing order, and the first element of each ro...read more
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Q2. 
Reverse Linked List Problem Statement
Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.
Input:
The first line of input is an intege...read more
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Round duration - 40 minutes
Round difficulty - Easy

This round had 2 coding questions and some basic questions revolving around OOPs

Q1. 
Palindromic Linked List Problem Statement
Given a singly linked list of integers, determine if it is a palindrome. Return true if it is a palindrome, otherwise return false.
Example:
Input:
1 -> 2 -...read more
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Q2. 
Maximum Level Sum in a Binary Tree
Given a Binary Tree with integer nodes, determine the maximum level sum among all the levels in the tree. The sum for a level is defined as the sum of all node values pr...read more
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Q3. How is an abstract class different from an interface?
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Q4. What is the difference between overloading and overriding?
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Q5. What is meant by static polymorphism?
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Round duration - 30 minutes
Round difficulty - Easy

Was conducted a couple of hours after the previous Tech round. The round was a HR one, behavioral questions and discussion around my hobbies :)