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Advenza Interview Questions and Answers

Updated 30 Aug 2024
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Q1. Write a pointers program and tell the diff between references and pointers.

Ans.

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

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Q2. What is shell scripting?

Ans.

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.

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Q3. Write a python code to reverse a string.

Ans.

Python code to reverse a string

  • Use slicing to reverse the string

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

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Q4. reverse a linked list

Ans.

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

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Q5. create a thread in process

Ans.

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

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Q6. find a bit is set

Ans.

To find if a bit is set, use bitwise AND operator with the bit position

  • Use bitwise AND operator (&) with the bit position to check if it is set

  • If the result is greater than 0, then the bit is set

  • Example: Check if 3rd bit is set in binary number 1010 - (1010 & 0100) = 0100 (4), so 3rd bit is set

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