Apisero Interview Questions and Answers

Code to find the second maximum number in an array.

• Sort the array in descending order and return the second element.

• Initialize two variables to store the maximum and second maximum values.

• Iterate through the array and update the variables accordingly.

Java code to get odd numbers

• Use a loop to iterate through numbers

• Check if the number is odd using modulus operator

• Add the odd number to a list or print it

The time complexity of swap array program is O(n).

• The time complexity is determined by the number of elements in the array.

• The program swaps the elements of the array one by one, so it takes linear time.

• The Big O notation for the time complexity is O(n), where n is the number of elements in the array.

• Examples: swapping two elements in an array takes constant time, but swapping all elements takes linear time.

Annotations in Spring Boot and their meanings

• 1. @SpringBootApplication - used to mark the main class of a Spring Boot application

• 2. @RestController - used to mark a class as a RESTful controller

• 3. @Autowired - used to inject dependencies into a class

• 4. @RequestMapping - used to map HTTP requests to methods in a controller

• 5. @PathVariable - used to extract values from the URI in a request mapping

• 6. @RequestBody - u...read more

Armstrong number problem solved using double pointers.

• Use double pointers to access each digit of the number.

• Calculate the sum of each digit raised to the power of the number of digits.

• Compare the sum with the original number to check if it is an Armstrong number.

On-premises servers can be connected to the Cloud using VPN or Direct Connect.

• Use a VPN to establish a secure connection between on-premises servers and the Cloud.

• Direct Connect can be used for a dedicated, private connection between on-premises servers and the Cloud.

• Ensure proper network configuration and security measures are in place.

• Examples of VPN solutions include OpenVPN, Cisco AnyConnect, and AWS VPN.

• Examp...read more

Stored Procedures are pre-compiled SQL statements stored in the database and executed on demand.

• Stored Procedures are used to improve performance by reducing network traffic and improving security.

• They can be used to encapsulate business logic and provide a consistent interface to the database.

• They can be called from other PL/SQL code or from external applications.

• Examples include procedures for inserting, updatin...read more

I handle exceptions by catching them and handling them appropriately.

• I use try-catch blocks to catch exceptions.

• I log the exception details for debugging purposes.

• I handle the exception based on the type and severity.

• I throw custom exceptions when necessary.

• I ensure that the application remains stable and doesn't crash due to exceptions.