Answer:
programmers who are competent in data structures and algorithms can easily perform the tasks related to data processing ,automated reasoning ,or calculations . data structure and algorithms is significant for developers as it shows their problems solving abilities amongst the prospective employers .
Doubly linked chain
When a linked chain contains nodes that reference both the next node and the previous node, it is called a doubly linked chain. This type of chain is often used in data structures because it provides a way to easily traverse the data in both directions. However, because each node must reference both the next node and the previous node, doubly linked chains require more memory than singly linked chains.
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Answer:A password or a PIN
Explanation: Develetech is a industry that has the a internet page and can also be used in the mobile devices. There is particular authorization that the organization provides to an individual user for accessing of the services to maintain the security .The security is maintained by providing the devices with an encrypted text that is known as the password. The user has to enter the pin or password to execute the service on device.