Tietoevry Interview Questions and Answers

DSA questions and programming concepts

Q1. Reverse string and optimize it
Ans. 
Reverse array of strings efficiently
• Use two pointers approach to swap characters from start and end of each string

• Optimize by using in-place reversal instead of creating new strings

• Consider edge cases like empty strings or strings with only one character
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Q2. Reverse binary tree
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Q1. Salary expectations
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Q2. Joining location
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Q1. What is the code to reverse a string without reversing its words in C++?
Ans. 
This code reverses the characters of a string while keeping the order of words intact in C++.
• Split the string into words using a space as a delimiter.

• Reverse the entire string to get the characters in reverse order.

• Reverse each individual word to restore their original order.

• Example: Input: 'Hello World' -> Output: 'dlroW olleH'
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Q2. What is the code implementation for deep copy and shallow copy in programming?
Ans. 
Deep copy creates a new object with copies of nested objects; shallow copy copies references to nested objects.
• Shallow Copy: Copies the object's reference, not the actual object. Example: `list2 = list1.copy()`.

• Deep Copy: Creates a new object and recursively copies all objects found in the original. Example: `import copy; list2 = copy.deepcopy(list1)`.

• Shallow Copy is faster but can lead to unintended side effects if th...read more
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Q3. What SQL query can be used to return results where the age is greater than 2?
Ans. 
Use a SQL query to filter records where age is greater than 2.
• Basic SQL syntax: SELECT column_name FROM table_name WHERE condition;

• Example query: SELECT * FROM users WHERE age > 2;

• This query retrieves all records from the 'users' table where the age column has values greater than 2.

• Ensure the 'age' column is of a numeric type to avoid errors.
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A program that demonstrates the use of strings and arrays.

Q1. Asked about Relocation
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Q1. Standardize process?
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Q2. Conduct Background checks?
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Q1. Communication with candidates?
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Q2. Collect Feedback
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How to remove duplicates from an array

Q1. Some basic questions on java
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Q2. One coding question on Java
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Q1. What are testing techniques
Ans. 
Testing techniques are methods used to verify and validate software applications to ensure they meet requirements and function correctly.
• Black box testing: Testing the functionality of a software application without knowledge of its internal code.

• White box testing: Testing the internal logic and structure of a software application.

• Regression testing: Re-running tests on previously tested software to ensure that new cha...read more
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Concentrate on processes for documentation related to task-oriented software and collaborate with global teams.