Programming questions are an integral part of interviews for a developer’s position. Regardless of the programming language you’ve mastered, it’s expected that you’d be familiar with the fundamentals of programming concepts. Most interviews consist of algorithm and data structure related questions, such as an array, binary tree, string, and linked list.

It’s important to study and practice programming interview questions before you face your interviewer—it’ll boost your confidence and help you answer the questions quicker. Here are some common interview questions for programmers:

###### Question 1: How can you reverse a string?

Answer: A string can be reversed through the following algorithm:

• Initiate
• Declare the string which needs to be reversed.
• Get the string’s length.
• Begin a loop before swapping the positions of the array elements.
• Hold the new positions.
• Print the new reversed string.
###### Question 2: What’s a palindrome string?

Answer: The palindrome string remains the same on reversing, such as the word ‘madam’.

###### Question 3: How can you get matching characters in a string?

• Take the Hash Map data structure—it works with the key-value pair.
• Loop all of the strings by character and verify the existence of that string’s character in the hash map, then put a count as 1.
• If there’s a true result, you must increase the character’s counter in the hash map.
• After the loop ends, the hash map must be traversed to print any characters with a count above 1.
###### Question 4: What is the process of reversing a linked list?

Answer: You can reverse a linked list by following the steps below:

• Declare three nodes as preceding, present, and following.
• The preceding node will be null while in the present.
• Reverse the list to be preceded by present.
• Present and preceding get incremented by 1 in each looping.
###### Question 5: Compute the first 5 Fibonacci numbers

The first two Fibonacci numbers are 0 and 1, with all the numbers after that being an addition of the previous two.

If you need additional help in preparing for your programming interview, reach out to a veteran in the field! I am Pritish Kumar Halder, a senior software developer and programmer with extensive experience in SQL, Oracle, SOA and web and mobile applications.

You can find questions to prepare for java interviews, JSP interview questions, and questions to prepare for a job interview on my blog.

Contact me for assistance regarding any software challenges!