Marelli Software Engineer Analyst Interview Questions and Answers

Q1. Memory hierarchy in OS
Ans. 
Memory hierarchy in OS refers to the organization of different types of memory in a computer system.
• Memory hierarchy typically includes registers, cache memory, main memory (RAM), and secondary storage (hard drive, SSD).

• Registers are the fastest and smallest type of memory, located within the CPU.

• Cache memory is a small, fast memory located between the CPU and main memory, used to store frequently accessed data.

• Main me...read more
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Q2. Explain memory leak.
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Memory leak is a situation where a program fails to release memory it has allocated, leading to a gradual loss of available memory.
• Memory leaks occur when a program allocates memory but does not release it when it is no longer needed.

• This can lead to a gradual decrease in available memory, eventually causing the program or system to crash.

• Common causes of memory leaks include improper management of dynamic memory alloc...read more
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Q1. Insertion sort implement in c++
Ans. 
Insertion sort is a simple sorting algorithm that builds the final sorted array one item at a time.
• Start from the second element and compare it with the elements before it to find the correct position.

• Repeat this process for all elements in the array.

• Time complexity is O(n^2) in the worst case scenario.

• Example: void insertionSort(string arr[], int n) { for (int i = 1; i < n; i++) { string key = arr[i]; int j = i - 1; w
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Q2. Matrix chain multiplication DSA problem
Ans. 
Matrix chain multiplication is a dynamic programming problem to find the most efficient way to multiply a given sequence of matrices.
• Use dynamic programming to solve this problem efficiently.

• Create a 2D array to store the minimum number of multiplications needed to multiply matrices.

• Iterate over different combinations of matrices to find the optimal solution.

• Example: For matrices A, B, C with dimensions 10x30, 30x5, 5x
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Q3. Explain project
Ans. 
Developed a web application for tracking project progress and managing tasks
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express for back-end

• Utilized MongoDB for database storage
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Q1. Hell about your self.
Ans. 
I am a software development engineer with 5 years of experience in building scalable web applications.
• 5 years of experience in software development

• Proficient in building scalable web applications

• Strong knowledge of programming languages such as Java, Python, and JavaScript
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Q2. Why you want to join this company.
Ans. 
I am impressed by the company's innovative projects and collaborative work culture.
• Innovative projects in AI and machine learning excite me

• Positive reviews from current employees about the work environment

• Opportunities for growth and learning in a supportive team
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Q1. What is polymorphism
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance allows a child class to override a method from its parent class, providing different func
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Q2. Why You choose java
Ans. 
I chose Java for its platform independence, strong community support, and extensive libraries.
• Platform independence allows Java code to run on any device with a JVM

• Strong community support ensures access to resources and help when needed

• Extensive libraries provide pre-built solutions for common programming tasks
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Logical, Patterns, Analytical

Q1. Technical + HR round
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Q2. Technical + HR round
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Q1. How would you preprocess the raw data
Ans. 
Preprocessing raw data involves cleaning, transforming, and organizing data to make it suitable for analysis.
• Remove any irrelevant or duplicate data

• Handle missing values by imputation or deletion

• Normalize or standardize numerical data

• Encode categorical variables using techniques like one-hot encoding

• Feature scaling for machine learning algorithms

• Perform text preprocessing like tokenization and stemming
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Q2. How would you specify a solution that has been already existing
Ans. 
Specify the existing solution by documenting its architecture, components, technologies used, and any modifications made.
• Document the architecture of the solution, including high-level components and their interactions

• List the technologies used in the solution, such as programming languages, frameworks, and databases

• Describe any modifications or customizations made to the existing solution

• Include any performance metric...read more
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On arrays and strings

Q1. Core java, micro services
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Q2. Core java, micro services, kafka
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Q3. Java, micto services, kafka, spring boot
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Q4. Multi threading, docker, kds
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Q5. All above listed questions
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Moderate level aptitude but cutoff was at 75%

Q1. Mainly c, aptitude
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Q1. Mostly related to C programming, projects done.
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Q1. Previous Experiences
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Q2. Relevance to current Job Description
Ans. 
My skills and experience align perfectly with the job description.
• I have experience in all the required programming languages and tools.

• I have worked on similar projects in the past.

• I am familiar with the industry standards and best practices.

• I am a quick learner and can adapt to new technologies easily.
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Q3. Joining Dates and Salary expectations
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Q1. Detailed explanation of responsibilities in previous jobs
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Q2. Understanding of Technical skills with examples
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Q3. Experiences with Agile processes
Ans. 
I have extensive experience working with Agile methodologies.
• I have worked in Scrum and Kanban teams, using JIRA and Trello for project management.

• I have participated in daily stand-up meetings, sprint planning, and retrospectives.

• I have experience with continuous integration and delivery, using tools such as Jenkins and GitLab.

• I have worked in cross-functional teams, collaborating with product owners, designers, and Q...read more
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Q4. How would your previous manager / colleagues rate you?
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