Interview Questions and Answers

GCD is a low-level API for managing concurrent operations, while Queue is a high-level API for managing tasks in a FIFO order.

• GCD stands for Grand Central Dispatch and is a low-level API for managing concurrent operations in iOS and macOS.

• Queues are a high-level API in GCD used for managing tasks in a FIFO (First In, First Out) order.

• GCD allows you to create and manage queues, while queues are used to execute tasks concurrently or serially.

• GCD provides a way to manage threads...read more

Static keyword is used in Java to create class-level variables and methods. Dependency injection is a design pattern used to inject dependencies into a class. @Autowired is a Spring annotation used for automatic dependency injection.

• Static keyword is used to create variables and methods that belong to the class itself, rather than to instances of the class.

• Dependency injection is a design pattern where the dependencies of a class are provided from the outside, rather than cre...read more

Program to find the least producible number in a given int array using core Java

• Iterate through the array and check if any two numbers can be multiplied to get a number in the array

• If not, return the smallest number in the array

• Handle edge cases such as negative numbers and zero

The number of hours a security guard works depends on the specific job requirements and shifts.

• Hours can vary from part-time positions with a few hours per week to full-time positions with 40+ hours per week.

• Some security guards work night shifts, weekends, or holidays, which may require longer hours.

• Overtime may be available depending on the employer and job responsibilities.