Amdocs Associate Software Engineer Interview Questions and Answers

Print all prime numbers within the range from 2 to N.

• Iterate from 2 to N and check if each number is prime

• A prime number is a number greater than 1 that has no positive divisors other than 1 and itself

• Use a nested loop to check divisibility by numbers less than the current number

Singleton class in Java ensures that a class has only one instance and provides a global point of access to it.

• Singleton class is implemented by making the constructor private to prevent instantiation from outside the class.

• It provides a static method to access the single instance of the class.

• The instance is created only once and reused throughout the application.

• Example: Logger class in Java can be implemented a...read more

Count the number of subarrays where the number of 0s is equal to the number of 1s in a given array of 0s and 1s.

• Iterate through the array and keep track of the count of 0s and 1s encountered so far.

• Use a hashmap to store the count of 0s and 1s encountered at each index.

• For each index, check if the count of 0s and 1s encountered so far are equal. If yes, increment the total count of subarrays.

Check if a given string is a palindrome after removing special characters, spaces, and converting to lowercase.

• Remove special characters and spaces from the input string

• Convert the string to lowercase

• Check if the modified string is a palindrome by comparing characters from start and end

Garbage collector in Java is a built-in mechanism that automatically manages memory by reclaiming unused objects.

• Garbage collector runs in the background to identify and remove objects that are no longer needed.

• It helps prevent memory leaks and optimize memory usage.

• Examples of garbage collectors in Java include Serial, Parallel, CMS, and G1.

Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity. Denormalization is the opposite process, adding redundancy to improve read performance.

• Normalization involves breaking down a table into smaller tables and defining relationships between them to reduce redundancy.

• Denormalization involves combining tables to reduce the number of joins needed for queries, i...read more