30+ Talent Arabia Interview Questions and Answers

Use command line tools like 'ps' or 'top' to find the number of running processes on a server.

• Use 'ps aux' command to list all running processes and count the number of lines

• Use 'top' command and look for the 'Tasks' section which shows the number of running processes

• Use 'htop' command which provides a more interactive and detailed view of running processes

The command used for taking Wireshark logs is 'tcpdump'.

• Wireshark is a network protocol analyzer tool

• Tcpdump is a command-line tool used to capture network traffic

• Tcpdump can be used to capture packets and save them as a file for analysis in Wireshark

• Example command: tcpdump -i eth0 -w capture.pcap

RB's bandwidth usage depends on the specific product and its features.

• RB's have different bandwidth usage depending on the product

• The bandwidth usage also depends on the features of the product

• Examples of RB's with different bandwidth usage are RB750Gr3 and RB4011iGS+RM

I am not using any numerology in my work as a Senior Software Engineer.

• I do not believe in numerology and do not use it in my work.

• My focus is on writing efficient and effective code.

• Numerology has no place in software engineering.

Count the number of connected islands in a graph

• Use Depth First Search (DFS) or Breadth First Search (BFS) to traverse the graph and mark visited nodes

• Keep track of the number of islands encountered during traversal

• An island is a group of connected 1s in a 2D grid, where '1' represents land and '0' represents water

Use 5 threads to print alternate numbers with thread synchronization

• Create 5 threads, each responsible for printing a specific set of numbers

• Use mutex or semaphore to synchronize the threads

• Thread 1 prints odd numbers, Thread 2 prints even numbers, and so on

• Ensure proper handling of thread creation and synchronization

• Example: Thread 1 prints 1, 3, 5, ... Thread 2 prints 2, 4, 6, ...

Memory leaks can be found and fixed using various tools and techniques.

• Use memory profiling tools like Valgrind, LeakSanitizer, or AddressSanitizer to detect memory leaks.

• Analyze the code to identify the root cause of the memory leak and fix it.

• Ensure that all allocated memory is properly deallocated and avoid unnecessary memory allocations.

• Use smart pointers and garbage collection techniques to manage memory automatically.

• Regularly monitor and test the application to prevent...read more

Linux system process, PKI, Cryptography, and Secure Boot process are all important components of secure computing.

• Linux system process refers to the way in which the operating system manages and executes programs and applications.

• PKI (Public Key Infrastructure) is a system for managing digital certificates and public-private key pairs to ensure secure communication.

• Cryptography involves the use of mathematical algorithms to secure data and communications.

• Secure Boot process i...read more

Circular buffer program with producer and consumer scenario, detecting overflow and stopping producer.

• Implement a circular buffer with a fixed size and two pointers for producer and consumer

• Use semaphores to synchronize access to the buffer

• When the buffer is full, stop the producer until the consumer reads from the buffer

• When the buffer is empty, stop the consumer until the producer writes to the buffer

• Use mutex locks to prevent race conditions

• Implement error handling for ove...read more

To find a loop in a linked list, use Floyd's cycle-finding algorithm.

• Use two pointers, one moving at a rate of one node per iteration and the other moving at a rate of two nodes per iteration.

• If there is a loop, the two pointers will eventually meet at the same node.

• If there is no loop, the faster pointer will reach the end of the list.

• Time complexity: O(n), Space complexity: O(1)

Semaphore is a synchronization object used to control access to a shared resource.

• Semaphore is a signaling mechanism used to control access to a shared resource

• It maintains a count of available resources and blocks the thread if the count is zero

• Semaphore can be used to implement critical sections, mutexes, and barriers

• Examples include controlling access to a database or limiting the number of concurrent connections

Expression to clear nth bit in a number

• Use bitwise AND operator with the complement of 2 raised to the nth power

• Example: To clear 3rd bit of 1010, use 1010 & ~(1<<3) = 1000

Program to delete a node in a singly linked list

• Find the node to be deleted and its previous node

• Update the previous node's next pointer to skip the node to be deleted

• Free the memory occupied by the node to be deleted

To move the cursor 5 characters ahead of current position in an opened file.

• Use fseek() function to move the cursor to the desired position.

• Pass the current position and offset to fseek() function.

• Use SEEK_CUR as the reference point for the offset.

BWP part concept refers to the concept of breaking down a software system into smaller, more manageable parts.

• BWP stands for Break-When-Problematic

• It helps in identifying and isolating issues in the system

• Each part should have a clear responsibility and interface with other parts

CCE stands for Continuous and Comprehensive Evaluation.

• CCE is a system of evaluation in education that assesses students' progress continuously throughout the year.

• It is a comprehensive approach that takes into account various aspects of a student's development, including academic, social, and emotional.

• CCE aims to reduce the emphasis on rote learning and promote a more holistic approach to education.

• It was introduced in India as part of the Right to Education Act in 2009.

• Und...read more

WAP set bit or reset bit is a programming concept used to manipulate individual bits in a binary number.

• Setting a bit involves changing its value from 0 to 1.

• Resetting a bit involves changing its value from 1 to 0.

• This concept is commonly used in low-level programming and hardware manipulation.

• Example: Setting the 3rd bit of a binary number 1010 would result in 1110.

• Example: Resetting the 2nd bit of a binary number 1101 would result in 1001.

Corset is a tight-fitting undergarment worn to shape and support the torso.

• Corsets were popular in the Victorian era.

• They were worn by women to achieve an hourglass figure.

• Modern corsets are often used as fashion statements or for waist training.

• Corsets can be made of various materials such as satin, leather, or lace.

• They can be fastened with laces, hooks, or zippers.

UE attach procedure is a process in LTE network where a UE establishes a connection with the network.

• UE sends RRC Connection Request message to eNodeB

• eNodeB sends RRC Connection Setup message to UE

• UE sends RRC Connection Setup Complete message to eNodeB

• eNodeB sends RRC Connection Reconfiguration message to UE

• UE sends RRC Connection Reconfiguration Complete message to eNodeB

• UE is now attached to the network

Arrays are faster for random access, while linked lists are better for frequent insertions and deletions.

• Arrays have a fixed size, while linked lists can grow dynamically.

• Arrays are stored in contiguous memory, while linked lists use pointers to connect nodes.

• Accessing an element in an array is O(1), while in a linked list it is O(n).

• Inserting or deleting an element in an array is O(n), while in a linked list it is O(1) if you have a reference to the node.

• Arrays are better fo...read more

System call is a request made by a program to the operating system for performing a specific task.

• System call provides an interface between the user program and the operating system.

• It allows user programs to request services from the operating system.

• Examples of system calls include read, write, open, close, fork, exec, etc.

• System call is initiated by a software interrupt or trap instruction.

• The operating system performs the requested task and returns the result to the user ...read more

Secure boot flow in Intel and NXP

• Intel uses a firmware-based approach to secure boot, where the firmware verifies the digital signature of the bootloader and OS kernel before loading them

• NXP uses a hardware-based approach to secure boot, where the boot ROM verifies the digital signature of the bootloader and OS kernel before loading them

• Both Intel and NXP use Trusted Platform Module (TPM) to store and verify the digital signature of the bootloader and OS kernel

• Secure boot ens...read more

Rach procedure is a surgical procedure used to correct scoliosis.

• Rach procedure involves placing screws and rods in the spine to straighten it.

• It is typically used for patients with severe scoliosis.

• The procedure can take several hours and requires a hospital stay.

• Physical therapy is often necessary after the procedure to aid in recovery.

Answering which statement about a binary heap is false.

• A binary heap is a complete binary tree where the parent node is always greater or smaller than its children.

• A binary heap can be represented as an array.

• A binary heap can be used to implement priority queues.

• A binary heap can only be a max heap and not a min heap.

Mutex is a synchronization mechanism used to prevent multiple threads from accessing shared resources simultaneously.

• Mutex stands for mutual exclusion.

• It is used to protect critical sections of code where multiple threads may try to access shared resources.

• Mutex allows only one thread to access the shared resource at a time.

• If another thread tries to access the resource while it is locked by a mutex, it will be blocked until the mutex is released.

• Mutex can be used in conjunct...read more

Designing a thread-safe singleton class

• Use double-checked locking to ensure thread safety

• Make the constructor private to prevent direct instantiation

• Provide a static method to access the singleton instance

• Use synchronized keyword or locks to handle concurrent access

• Consider lazy initialization or eager initialization based on requirements

Designing a system involves creating a plan for how all components will work together to achieve the desired outcome.

• Identify the requirements and goals of the project

• Create a high-level design outlining the system architecture

• Break down the system into smaller components and design each one individually

• Consider scalability, reliability, and performance in the design

• Test the design to ensure it meets the requirements and functions correctly

Kubernetes is an open-source container orchestration platform that automates deployment, scaling, and management of containerized applications.

• Kubernetes is used to manage containerized applications across multiple hosts.

• It automates deployment, scaling, and management of containerized applications.

• Kubernetes provides features like load balancing, self-healing, and rolling updates.

• It makes it easier to manage and scale containerized applications.

• Kubernetes is different from D...read more

Virtual function is a function in base class that is overridden in derived class.

• Virtual function allows polymorphism in C++.

• It is declared in base class with virtual keyword.

• It is overridden in derived class with same signature.

• It is called based on the object type at runtime.

• Example: virtual void display() = 0; // pure virtual function

Convert a binary tree to a singly linked list.

• Traverse the tree in-order and add each node to the linked list.

• Use a stack to keep track of the nodes while traversing the tree.

• Recursively merge the left and right subtrees into the linked list.

• Use a queue to perform a level-order traversal and add nodes to the linked list.

Implementing a linked list involves creating a data structure that consists of nodes linked together.

• Create a Node class with a value and a next pointer

• Create a LinkedList class with a head pointer

• Implement methods to add, remove, and traverse nodes

• Consider edge cases such as adding to an empty list or removing the head node

Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

• Identify the primary key of the table

• Eliminate repeating groups and create separate tables for them

• Ensure each table has a single theme or subject

• Create relationships between tables using foreign keys

• Ensure data is consistent and follows a standard format