Blue Yonder Lead Software Engineer Interview Questions, Process, and Tips

First 20 question for apti and then coding round of 20 questions each from c/c++ , java and SQL

Q1. OOPS questions Data structure like linked list Binary search SQL
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Q2. Is multiple inheritance allowed in java?
Ans. 
No, multiple inheritance is not allowed in Java.
• Java does not support multiple inheritance for classes to avoid the diamond problem.

• However, multiple inheritance is allowed for interfaces in Java.

• Example: class A extends B, C is not allowed, but interface A extends B, C is allowed.
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Q3. What is inheritance
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Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Example: Class 'Car' can inherit properties and methods from class 'Vehicle'
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Q4. What is real time example of polymorphism
Ans. 
Polymorphism in software development is like a person driving different vehicles using the same driving skills.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• For example, a superclass 'Shape' can have subclasses like 'Circle' and 'Rectangle' which can be treated as 'Shape' objects.

• Calling a method like 'draw()' on a 'Shape' object will execute the specific implementatio...read more
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Q5. What is your project based on?
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The coding round had 2 coding+ 1 SQL + 8 mcqs bon OS and networking. I was able to solve all.

Q1. Find unique and duplicate elements in an array.
Ans. 
To find unique and duplicate elements in an array.
• Create two empty arrays, one for unique elements and one for duplicates.

• Loop through the array and check if the element is already in the unique array.

• If it is, add it to the duplicates array. If not, add it to the unique array.

• Return both arrays.
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Q2. Implementation of all linked list operations from scratch and reverse it.
Ans. 
Implementing all linked list operations from scratch and reversing it.
• Start by creating a Node class with data and next pointer

• Implement insert, delete, search, and traverse operations

• To reverse the linked list, use three pointers to reverse the direction of the links

• Make sure to handle edge cases such as empty list and single node list
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Q3. File handling question.
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Q4. SQL question to find third highest salary.
Ans. 
SQL query to find third highest salary.
• Use ORDER BY and LIMIT to get the third highest salary.

• Use subquery to avoid duplicates in case of multiple employees having same salary.

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 2,1;
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Q1. Was asked about academics.
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Q2. Types of inter process communication.
Ans. 
Inter process communication (IPC) allows processes to communicate with each other and share resources.
• Shared memory

• Pipes

• Sockets

• Message queues

• Signals
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Q3. Linux based questions
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Q4. System design question to design an app like Twitter by drawing block diagram.
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Q1. Describe yourself apart from resume.
Ans. 
I am a passionate software engineer with a strong background in developing scalable and efficient applications.
• Proficient in multiple programming languages such as Java, Python, and C++

• Experienced in developing web applications using frameworks like Spring and Django

• Familiar with database management systems like MySQL and MongoDB

• Strong problem-solving and analytical skills

• Excellent communication and teamwork abilities
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Q2. Tell me about weakness.
Ans. 
I tend to be overly critical of my own work.
• I have a tendency to be too self-critical and strive for perfection.

• I often spend more time than necessary on a task to ensure it meets my high standards.

• I sometimes struggle with accepting constructive criticism and can take it personally.

• I am actively working on improving my ability to recognize and appreciate my own accomplishments.
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Q3. If u are placed urself in a company how would you introduce yourself to the team.
Ans. 
I would introduce myself to the team by sharing my background, skills, and enthusiasm for software engineering.
• Start by sharing your name and a brief overview of your professional background.

• Highlight your technical skills and experience in software engineering.

• Express your enthusiasm for the field and your eagerness to contribute to the team.

• Mention any relevant projects or achievements that demonstrate your abilities...read more
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Q4. Was asked about where I live. It was just a 5 mins round.
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Q1. No questions were asked
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Q2. Nothing was asked as no one joined the call
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Hacker Rank questions
Time ! hour

Q1. 1)grouping of array 2)Recursion 3)creating matrix
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Q2. Basics on oops concept
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