Packfora Interview Questions and Answers

Attended the codevita competition in final year of college.

Q1. About College Project
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Q2. Some very basics of java
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Q3. Experience of college project as a team
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Round duration - 60 minutes
Round difficulty - Easy

Round duration - 50 minutes
Round difficulty - Easy

Round duration - 60 minutes
Round difficulty - Easy

At the beginning of this round, the interviewer asked me about the data structures I knew. Linked lists, trees, graphs, arrays etc. was my answer. He asked me how well I knew Dynamic Programming. I said I wasn’t strong in that and he said that he would ask me a question on dynamic programming for sure.

Round duration - 40 minutes
Round difficulty - Easy

The interviewer asked me if I was comfortable with the interview process so far and how the previous interviews were. I said it was good and he gave me the first problem to solve.

Round duration - 60 minutes
Round difficulty - Easy

The interviewer asked me some Com­puter Sci­ence‍ fundamentals in this round as well as some behavioural questions.

Q1. Implement a Trie data structure and write functions to insert and search for a few words in it.
Ans. 
Implement a Trie data structure with insert and search functions.
• Create a TrieNode class with children and isEndOfWord attributes.

• Implement insert function to add words by iterating through characters.

• Implement search function to check if a word exists by traversing the Trie.

• Example: Insert 'apple', 'banana', 'orange' and search for 'apple' and 'grape'.
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Q1. If you cleared Aptitude and Coding, Mostly Interview will be cleared with some basics questions like OOPs concepts, sort functions kind of questions.
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Q2. Explain OOPs concept in JAVA?
Ans. 
OOPs concept in JAVA is a programming paradigm that focuses on objects and their interactions.
• OOPs stands for Object-Oriented Programming

• It involves the use of classes, objects, inheritance, polymorphism, and encapsulation

• Classes are used to define objects and their properties

• Objects are instances of classes that can interact with each other

• Inheritance allows for the creation of new classes based on existing ones

• Polymo...read more
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Q3. Function to sort an array in Java?
Ans. 
Java provides Arrays.sort() method to sort an array.
• Use Arrays.sort() method to sort an array of strings.

• The method sorts the elements in ascending order by default.

• To sort in descending order, use Collections.reverseOrder() method.
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Q4. Tell me about yourself?
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Q5. Final year project which you worked on?
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