Sabre Software Engineer Interview Questions and Answers

Q1. Explain OOPS concept and how you apply it in your implementation
Ans. 
OOPS is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOPS focuses on the concept of classes and objects

• Encapsulation: bundling data and methods that operate on the data within a single unit

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

• Polymorphism: ability to present the same interface for diffe...read more
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Q2. Difference between Comparable and Comparator. Difference between Abstract Class and Interface
Ans. 
Comparable is an interface used for natural ordering, Comparator is an interface used for custom ordering. Abstract class can have method implementations, Interface cannot.
• Comparable interface is used to define the natural ordering of objects. Example: String class implements Comparable interface for natural ordering based on alphabetical order.

• Comparator interface is used to define custom ordering of objects. Example:...read more
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Q3. Given a string. Find the number of occurrences of each character
Ans. 
Count occurrences of each character in a given string
• Create an array to store the count of each character

• Iterate through the string and increment the count of each character in the array

• Return the array with counts for each character
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Q4. Given an array. Remove the number of duplicates
Ans. 
Remove duplicates from an array of strings
• Iterate through the array and store each element in a set to keep track of unique values

• Create a new array with the unique values from the set
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Q5. Given a student object having name and grade data variables. Sort the object on the basis of highest grade.
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2 Coding questions, 1 SQL and a few MCQs.

Q1. Given a String find the lexicographically lowest substring containing k number of 1s
Ans. 
Find the lexicographically lowest substring with k 1s in a given string.
• Iterate through the string and maintain a sliding window of size k.

• Keep track of the count of 1s in the window and update the result if a valid substring is found.

• Return the lexicographically lowest substring with k 1s.
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Q2. Given to solve SQL Questions based on Join and group by.
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Q1. Technical Discussion
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Q2. Questions based on operating Systema and OOPs
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Q3. Difference between Abstract class and interface
Ans. 
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructors, fields, and methods, while interface cannot have any implementation.

• A class can only extend one abstract class, but can implement multiple interfaces.

• Abstract classes are used to define a common behavior for subclasses, while interfaces are used to define a contract for cl...read more
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Q4. Process Synchronisation
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Q5. Was asked what project would I take up if I get funded and list the challenges of taking up the project.
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Q1. Just Basic HR Questions
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