Mashreq Bank Senior Software Engineer Interview Questions and Answers

Group id is a unique identifier for a group of consumers in Kafka consumer configuration.

• Group id helps in coordinating the consumption of messages among multiple consumers in a consumer group.

• Each consumer group should have a unique group id to ensure proper message distribution.

• Changing the group id will result in the consumer group starting consumption from the beginning of the topic.

• Group id is specified in the con...read more

Recursive algorithm for multiplying 2 numbers

• Define a base case for when one of the numbers is 0

• Use recursion to repeatedly add the second number to the result until the first number reaches 0

• Consider handling negative numbers and optimizing for efficiency

Spring filters are used to intercept HTTP requests and responses in a Spring application.

• Spring filters can be used for logging, authentication, authorization, etc.

• They are implemented using the javax.servlet.Filter interface.

• Filters can be configured in the web.xml file or using annotations like @WebFilter.

• Example: Implementing a logging filter to log incoming requests and outgoing responses.

SQL query to retrieve the first 5 biggest salaries from a table

• Use the ORDER BY clause to sort salaries in descending order

• Use the LIMIT clause to limit the results to the first 5 rows

Program to check if a number is a palindrome or not.

• Convert the number to a string to easily check for palindrome

• Reverse the string and compare it with the original string

• If they are the same, the number is a palindrome

Lambda expressions in Java are used to provide a concise way to represent anonymous functions.

• Lambda expressions are used to define inline implementation of a functional interface.

• They enable you to pass functionality as an argument to a method.

• Lambda expressions are made up of parameters, an arrow, and a body.

• Example: (a, b) -> a + b

To call a default method of an interface when a class implements multiple interfaces, use the interface name followed by the method name.

• Use InterfaceName.super.methodName() to call the default method of a specific interface.

• If a class implements multiple interfaces with default methods of the same name, you must specify the interface name to call the desired method.

• Example: Interface1.super.defaultMethod() to call the

ref is used for passing a variable by reference, out is used for returning a variable by reference

• ref is used for passing a variable by reference, allowing the method to modify the variable

• out is used for returning a variable by reference, typically used for returning multiple values from a method

• Example: int x = 10; SomeMethod(ref x); // x can be modified inside SomeMethod

• Example: int result; SomeMethod(out result); /