20+ Member Technical Interview Questions and Answers

Min's angle from 5 to 5:40 is 120 degrees.

• The minute hand moves 360 degrees in 60 minutes.

• From 5 to 6, the minute hand moves 30 degrees per 5 minutes.

• From 5 to 5:40, the minute hand moves 30 degrees per 8 minutes.

• Therefore, the angle made by the minute hand is 30 degrees x 8 = 240 degrees.

• However, the angle between 5 and 5:40 is only 240 degrees - 120 degrees = 120 degrees.

DFMEA stands for Design Failure Mode and Effects Analysis, VAVE stands for Value Analysis/Value Engineering.

• DFMEA is a systematic approach to identify and mitigate potential failures in a design.

• It involves analyzing the potential failure modes, their effects, and the likelihood of occurrence.

• DFMEA helps in prioritizing and implementing design changes to improve reliability and reduce risks.

• VAVE is a systematic approach to optimize the value of a product by reducing costs whi...read more

Security vulnerabilities include SQL injection, cross-site scripting, and insecure direct object references.

• SQL injection: attackers insert malicious SQL code into input fields to access or manipulate database

• Cross-site scripting: attackers inject malicious scripts into web pages viewed by other users

• Insecure direct object references: attackers access unauthorized data by manipulating object references

Different types of pointers include null pointers, void pointers, function pointers, and array pointers.

• Null pointers: pointers that do not point to any memory location.

• Void pointers: pointers that can point to any data type.

• Function pointers: pointers that point to functions.

• Array pointers: pointers that point to the first element of an array.

Answering technical interview questions on linked lists and arrays.

• To swap two nodes in a linked list, we need to identify the nodes and swap their pointers.

• To swap two numbers in an array, we can use a temporary variable to store one of the numbers while swapping.

• To count the frequency of elements in an array, we can use a hash table or a dictionary to store the count of each element.

• Example: swapping nodes in a linked list - if we want to swap nodes A and B, we need to iden...read more

Iterate through array using pointers

• Declare a pointer variable to point to the first element of the array

• Use a loop to iterate through the array by incrementing the pointer

• Stop the loop when the pointer reaches the end of the array

Pointers are variables that store memory addresses of other variables. They allow direct manipulation of memory.

• Pointers are declared using the * symbol.

• They can be used to pass values by reference.

• Pointers can be used to dynamically allocate memory.

• Example: int *ptr; ptr = # *ptr = 10;

• Example: void swap(int *a, int *b) { int temp = *a; *a = *b; *b = temp; }

Abstraction in OOP is the process of hiding unnecessary details and exposing only essential features of an object.

• Abstraction focuses on what an object does rather than how it does it.

• It allows us to create abstract classes and interfaces that can be used as blueprints for creating objects.

• Abstraction helps in achieving modularity, reusability, and maintainability of code.

• Example: A car can be abstracted as a vehicle with properties like speed, fuel, and methods like start, s...read more

To detect a loop in a Linked List, we can use Floyd's Cycle Detection Algorithm.

• Start with two pointers, slow and fast, both initially pointing to the head of the linked list.

• Move the slow pointer by one step and the fast pointer by two steps in each iteration.

• If there is a loop, the two pointers will eventually meet at some point within the loop.

Index in a database is a data structure that improves the speed of data retrieval operations.

• Indexes are used to quickly locate data without having to search every row in a database table.

• They are created on columns in a database table to speed up the query process.

• Examples of indexes include primary keys, unique keys, and composite keys.

Developed a smart irrigation system using IoT technology

• Designed and implemented a system to monitor soil moisture levels

• Integrated sensors and actuators to control water flow

• Developed a mobile app to remotely monitor and control the system

• Reduced water usage by 30% and improved crop yield by 20%

• Used Arduino and Raspberry Pi for hardware and Python for software

Hashing is a process of converting input data into a fixed-size string of bytes using a mathematical algorithm.

• Hashing is used to securely store passwords by converting them into a hash value.

• Hashing is used in data retrieval systems to quickly locate data based on its hash value.

• Common hashing algorithms include MD5, SHA-1, and SHA-256.

Partial view is a reusable view component in ASP.NET MVC which can be rendered within a view.

• Partial views can be used to break down complex views into smaller, manageable components.

• They can be rendered within other views using the @Html.Partial() method.

• Partial views are useful for reusing code and improving maintainability of MVC applications.

Selenium WebDriver is a tool used for automating web application testing. It provides a programming interface to interact with web elements.

• Selenium WebDriver is a popular open-source tool for automating web browsers.

• It allows testers to write test scripts in programming languages like Java, Python, etc.

• The architecture of Selenium WebDriver consists of client libraries, JSON wire protocol, browser drivers, and browsers.

• Client libraries provide methods to interact with web el...read more

Expected CTC and percentage

• Expected CTC refers to the salary package that the candidate is looking for

• Percentage refers to the academic percentage achieved by the candidate

• The candidate can mention their expected CTC based on their experience and industry standards

• The academic percentage can showcase the candidate's academic performance and potential

String manipulation in Python

• Use string methods like split(), join(), replace(), etc.

• Remember that strings are immutable in Python

• Be mindful of string concatenation efficiency

Pointer manipulation in C involves accessing and modifying memory addresses to work with data efficiently.

• Pointers are variables that store memory addresses.

• They are used to access and manipulate data directly in memory.

• Example: int *ptr; ptr = # *ptr = 10;

Bitwise operations in C are used to manipulate individual bits of data in variables.

• Bitwise AND (&) - sets a bit to 1 only if both corresponding bits are 1

• Bitwise OR (|) - sets a bit to 1 if either of the corresponding bits is 1

• Bitwise XOR (^) - sets a bit to 1 if the corresponding bits are different

• Bitwise NOT (~) - inverts all the bits in a variable

• Left shift (<<) - shifts the bits to the left by a specified number of positions

• Right shift (>>) - shifts the bits to the right...read more

Linked list is a data structure in C programming where each element points to the next element in the list.

• Linked list is made up of nodes, each containing data and a pointer to the next node.

• Insertion and deletion operations are efficient in linked lists compared to arrays.

• Traversal in linked list requires iterating through each node starting from the head node.

• Example: struct Node { int data; struct Node* next; };

• Example: Inserting a node at the beginning of a linked list: ...read more

Designing a lift involves considering various factors such as capacity, speed, safety features, and energy efficiency.

• Determine the maximum weight capacity and number of passengers the lift should accommodate

• Decide on the speed of the lift and the number of floors it should serve

• Include safety features such as emergency brakes, backup power supply, and fire protection

• Consider energy efficiency by using regenerative braking and LED lighting

• Choose the type of lift system such a...read more