Synechron Interview Questions, Process, and Tips

Checked exceptions are exceptions that must be declared in a method's signature or handled using try-catch blocks.

• Checked exceptions are checked at compile-time.

• They are typically used for exceptional conditions that can be reasonably recovered from.

• Examples of checked exceptions in Java include IOException, SQLException, and ClassNotFoundException.

To remove duplicates from an ArrayList of strings, use a HashSet to store unique elements.

• Create a HashSet and add all elements from the ArrayList to it.

• Create a new ArrayList and add all elements from the HashSet to it.

• The new ArrayList will contain only unique elements.

HashSet and HashMap are both data structures in Java that use hashing to store and retrieve elements.

• HashSet uses HashMap internally to store its elements as keys with a dummy value.

• HashMap uses an array of linked lists called buckets to store key-value pairs.

• Both HashSet and HashMap use the hashCode() method to calculate the hash value of keys.

• HashSet uses the hash value to determine the bucket where an element should...read more

Using Java stream, find the sum of all odd numbers in a list.

• Use the filter() method to filter out the odd numbers from the list.

• Use the mapToInt() method to convert the filtered numbers to integers.

• Use the sum() method to calculate the sum of the filtered odd numbers.

kubectl is a command line tool for interacting with Kubernetes clusters.

• Used to deploy applications, inspect and manage cluster resources, and view logs.

• Can be used to create, delete, and update resources in a Kubernetes cluster.

• Allows for scaling deployments, rolling updates, and debugging applications.

• Provides access to cluster information such as nodes, pods, services, and namespaces.