Nokia Networks Software Engineer Interview Questions and Answers

Pointers program and differences between references and pointers

• Pointers are variables that store memory addresses

• References are aliases for existing variables

• Pointers can be reassigned to point to different memory locations

• References cannot be reassigned to refer to a different variable

• Pointers require dereferencing to access the value they point to

• References automatically dereference when accessed

Shell scripting is a way to automate tasks by writing scripts in a shell language like Bash.

• Shell scripting allows for automating repetitive tasks in a Unix/Linux environment.

• Scripts can be written to execute commands, perform system administration tasks, and more.

• Examples include writing a script to backup files, automate software installations, or monitor system resources.

Python code to reverse a string

• Use slicing to reverse the string

• Example: input_string = 'hello', reversed_string = input_string[::-1]

Reverse a linked list by changing the next pointers of each node

• Initialize three pointers: prev = null, current = head, next = null

• Iterate through the linked list, updating next to current's next, current's next to prev, and moving prev and current pointers forward

• Return the new head, which is the last node visited

Creating a thread in a process involves allocating resources for a new thread to run concurrently with other threads.

• Use threading libraries like pthreads in C or java.util.concurrent in Java

• Create a new thread object and pass a function or method to be executed by the thread

• Start the thread to begin execution

• Join the thread to wait for it to finish before continuing