TransUnion Interview Questions, Process, and Tips

Q1. Basic for Core java
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Q2. Basics of selenium
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Q1. More on framework side
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Q2. Few question on Manual testing
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Q1. Intro about yourself
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I am a Senior Engineer with 10+ years of experience in software development, specializing in backend systems and cloud technologies.
• 10+ years of experience in software development

• Specialize in backend systems and cloud technologies

• Strong problem-solving skills

• Experience with large-scale systems

• Proficient in programming languages like Java, Python, and SQL
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Q2. Discussion on Job role
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Q1. Questions on Core java, Spring boot and Angular (from resume profile)
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Q2. Discussion on Personal project
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Q1. Detailed Discussion on Current project, entire application workflow and design, implementations and questions like Why, What and How on the tools, technologies, approach and servers used.
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Q1. Question on familiarity with Agile
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Q2. What things a working day constitute of?
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A working day for a software developer typically involves coding, debugging, attending meetings, collaborating with team members, and researching new technologies.
• Coding: Writing and testing code to develop software applications.

• Debugging: Identifying and fixing errors or bugs in the code.

• Meetings: Participating in team meetings to discuss project progress and updates.

• Collaboration: Working with team members to solve p...read more
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Q1. Java Based question answers
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Q2. Array traversal problem
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Traverse an array of strings
• Use a loop to iterate through each element in the array

• Access each element using its index

• Perform any necessary operations on each element
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Q1. Write a few python queries and some live sql coding and pyspark coding
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Q2. Machine learning questions. Way too deep. which is not even required
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Write a C++ program (logical) and OOPS concept, Basic,C concept such as memory and memory management techniques

Q1. OOPS concepts in C++
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OOPS concepts in C++ include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Creating new classes from existing ones, inheriting their attributes and methods.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only
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Q2. Difference between C and C++
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C is a procedural programming language while C++ is an object-oriented programming language.
• C is a subset of C++

• C does not support classes and objects, while C++ does

• C++ supports function overloading and operator overloading, which C does not

• C++ has a more complex syntax compared to C
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Q3. Multi threading
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Q4. Difference between binary and linear search
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Binary search divides the array in half to find the target, while linear search checks each element one by one.
• Binary search is more efficient for sorted arrays, while linear search works for unsorted arrays.

• Binary search has a time complexity of O(log n), while linear search has a time complexity of O(n).

• Example: Binary search - finding a word in a dictionary. Linear search - finding a name in a phone book.
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Q5. Time complexity of binary search and linear search. Which is better in which scenario
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Binary search has O(log n) time complexity, better for sorted arrays. Linear search has O(n) time complexity, better for small unsorted arrays.
• Binary search has a time complexity of O(log n) as it divides the array in half at each step. It is better for sorted arrays.

• Linear search has a time complexity of O(n) as it checks each element one by one. It is better for small unsorted arrays.

• For example, if you have a large ...read more
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Q6. Mutex when do u use and example
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Mutex is used to prevent multiple threads from accessing shared resources simultaneously.
• Use mutex when multiple threads need to access shared resources to avoid data corruption

• Example: Using mutex to protect a critical section of code where shared data is being modified

• Mutex can be used in multithreading applications to ensure data integrity and prevent race conditions
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Q1. F2F round. What is memory management and how to achieve this
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Q2. They give pen and paper. Write the code for wait in multi threading. Mutex and all...
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Q3. How to implement string1 is equal to string2 without using inbuilt function. Create your own method/ function
Ans. 
Create a custom method to check if two strings are equal without using inbuilt functions.
• Iterate through each character of both strings and compare them one by one.

• If the lengths of the strings are different, they are not equal.

• Return true only if all characters match, otherwise return false.
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Q4. What is memcpy.
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memcpy is a function in C programming used to copy a block of memory from one location to another.
• memcpy stands for memory copy.

• It is used to copy a specified number of bytes from one memory location to another.

• It is commonly used in C programming to copy arrays or structures.

• Example: memcpy(destination, source, num_bytes);
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Q5. Difference between synchronous and asynchronous in multi threading.
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Synchronous means tasks are executed one after the other, while asynchronous allows tasks to run independently.
• Synchronous execution waits for each task to finish before moving on to the next one.

• Asynchronous execution allows tasks to start and finish independently of each other.

• Synchronous threading can lead to blocking if one task takes a long time to complete.

• Asynchronous threading can improve performance by allowin...read more
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Q6. Write a code to find if the string is present or not. Given character array of strings. {(ABC), (BCA), (DCA)} etc.
Ans. 
Code to find if a string is present in an array of strings.
• Iterate through the array of strings and compare each string with the target string.

• Return true if the target string is found, false otherwise.

• Use a loop and conditional statement to implement the search algorithm.
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Q7. Two cats are rotating in circular motion. What is the probability that they won't collide
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Q1. How to treat multicollinearity, imbalanced dataset
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Multicollinearity can be treated by using techniques like feature selection, PCA, or regularization. Imbalanced datasets can be addressed by resampling techniques like oversampling or undersampling.
• For multicollinearity, consider using techniques like feature selection to remove redundant variables, PCA to reduce dimensionality, or regularization like Lasso or Ridge regression.

• For imbalanced datasets, try resampling te...read more
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Q1. Logistic regression in detail
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Logistic regression is a statistical model used to predict the probability of a binary outcome based on one or more predictor variables.
• Logistic regression is used when the dependent variable is binary (0/1, True/False, Yes/No, etc.)

• It estimates the probability that a given observation belongs to a particular category.

• The output of logistic regression is a probability score between 0 and 1.

• It uses the logistic function...read more
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Q2. Project related questions based on Machine learning
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Q1. No such questions from hr
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Q2. Simple job description
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Q1. Stakeholder management
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Q2. PM basics, SQL, scenario based
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Q3. Senior software solution architect questions
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