IBM Senior Developer Interview Questions and Answers for Experienced

Using sliding window technique to find subarray with sum equal to k.

• Initialize two pointers at the start of the array.

• Move the right pointer to expand the window until the sum is greater than or equal to k.

• Move the left pointer to shrink the window if the sum exceeds k.

• Repeat until the end of the array is reached.

• Example: Input array [1, 4, 20, 3, 10, 5], k=33. Output: [20, 3, 10].

Multiple consumers can access the same messages in Kafka by using consumer groups.

• Consumers can be grouped together to share the workload of processing messages.

• Each consumer in a group will receive a subset of the messages from the same topic.

• Consumers in the same group will coordinate to ensure that each message is processed only once.

• Consumer offsets are used to track the progress of each consumer in the group.

Yes, we have used the Factory Method and Singleton design patterns in the current project.

• Factory Method pattern was used to create objects without specifying the exact class of object that will be created.

• Singleton pattern was used to ensure a class has only one instance and provide a global point of access to it.