Coupa Software Inc Interview Questions, Process, and Tips

Q1. Testing statergies and process and people management related questions
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Q1. Peoplemanagement
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MCQs and coding problems
duration - 1Hr 30min

Q1. Which 2 methods must an object implement in order to be used as a key in hasmap and why
Ans. 
The object must implement the hashCode() and equals() methods to be used as a key in a hashmap.
• hashCode() method is used to generate a unique hash code for the object.

• equals() method is used to compare two objects for equality.

• Both methods are necessary for proper functioning of hashmap operations like put() and get().
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Q2. Is it preferable to use stringBuffer with its synchronized methods or stringBuilder when implementing toString() method? why?
Ans. 
Use stringBuilder for toString() method as it is faster and not thread-safe.
• stringBuilder is faster than stringBuffer as it is not thread-safe

• toString() method is used for converting an object to a string

• If thread-safety is required, use stringBuffer instead

• Example: StringBuilder sb = new StringBuilder(); sb.append("Hello"); sb.append("World"); return sb.toString();
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Q3. What are 2 checklists to be executed for overriding object.equals(object args) for a class with only one instance variable
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Q4. Is it good idea to wrap java.io.FileInputStream and java.io.FileOutputStream in buffered writers and readers and why?
Ans. 
Yes, it is a good idea to wrap FileInputStream and FileOutputStream in buffered writers and readers.
• Buffered streams improve performance by reducing the number of I/O operations

• Buffered streams also provide additional functionality like readLine() and newLine()

• Buffered streams can be chained together for even better performance

• Example: BufferedReader br = new BufferedReader(new FileReader(file));
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Q1. Overall good experience and well coordinated
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Q2. Excel test and tableau related question
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Q1. Skills and background
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Q2. About personal life
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Online coding test of three programming questions

Q1. On core technical skills based on what is mentioned in resume
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Q1. Vlookup, Advance Excel concepts
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