400+ Programmer Analyst Interview Questions and Answers

Code to check prime numbers in an array

• Iterate through each number in the array

• For each number, check if it is divisible by any number from 2 to the square root of the number

• If the number is only divisible by 1 and itself, it is a prime number

ViewBag, ViewData and TempData are used to pass data between controller and view in ASP.NET MVC.

• ViewBag is a dynamic object used to pass data from controller to view.

• ViewData is a dictionary object used to pass data from controller to view.

• TempData is a dictionary object used to pass data from one controller action to another.

• ViewBag and ViewData are short-lived and can only be used to pass data from controller to view.

• TempData is used to pass data between controller actions ...read more

Procedures and functions are both subroutines in programming, but functions return a value while procedures do not.

• Procedures are used to perform a specific task and do not return a value.

• Functions are used to perform a specific task and return a value.

• Procedures are called using the CALL statement, while functions are called by assigning their return value to a variable.

• Functions can be used in expressions, while procedures cannot.

• Functions can have parameters, while procedu...read more

SQL query to find second highest salary

• Use ORDER BY and LIMIT to get the highest salary

• Use subquery to exclude the highest salary and get the second highest

I have implemented various design patterns such as Singleton, Factory, and Observer in my projects.

• Implemented Singleton pattern to ensure only one instance of a class is created.

• Utilized Factory pattern to create objects without specifying the exact class of object that will be created.

• Used Observer pattern to define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.

Primary key uniquely identifies a record in a table, while Unique key ensures uniqueness of a column.

• Primary key cannot have null values, while Unique key can have one null value.

• A table can have only one Primary key, but multiple Unique keys.

• Primary key is automatically indexed, while Unique key is not necessarily indexed.

Temptable is a physical table created in tempdb while table variable is a variable created in memory.

• Temptable is used for large data sets or complex queries

• Table variable is used for small data sets or simple queries

• Temptable can be indexed and have constraints while table variable cannot

• Temptable can be accessed by multiple sessions while table variable is limited to the current session

Serialization is the process of converting an object into a stream of bytes to store or transmit data.

• Serialization is used to save the state of an object and recreate it when needed.

• In Java, serialization is achieved by implementing the Serializable interface.

• Example: ObjectOutputStream and ObjectInputStream classes are used for serialization in Java.

Arrays in structures allow grouping of related data, enhancing organization and access in programming.

• A structure can contain an array of strings to hold multiple values. Example: `struct Student { char names[10][50]; };`

• You can access individual strings using the structure variable. Example: `strcpy(student.names[0], "Alice");`

• Arrays in structures are useful for managing collections of data, like names, addresses, etc.

• You can also define an array of structures. Example: `str...read more

Technologies used in IT industry include cloud computing, artificial intelligence, blockchain, and internet of things.

• Cloud computing: AWS, Azure, Google Cloud

• Artificial intelligence: Machine learning, natural language processing

• Blockchain: Bitcoin, Ethereum

• Internet of things: Smart homes, wearables

OOPs concepts are fundamental principles in object-oriented programming that help in organizing and designing code.

• Encapsulation: Bundling data and methods that operate on the data into a single unit (class). Example: Class Car with properties like make, model, and methods like start(), stop().

• Inheritance: Ability of a class to inherit properties and behavior from another class. Example: Class SUV inheriting from Class Car.

• Polymorphism: Ability to present the same interface f...read more

A motor converts electrical energy into mechanical energy, while a generator converts mechanical energy into electrical energy.

• Motors use electrical energy to create motion, while generators use motion to create electrical energy.

• Motors have a rotor and a stator, while generators have a stator and a rotor.

• Examples of motors include electric fans, washing machines, and power tools, while examples of generators include wind turbines and hydroelectric dams.

I systematically identify and resolve issues in code through structured debugging techniques.

• Reproduce the issue: Ensure the problem can be consistently replicated.

• Check error messages: Analyze any error messages or logs for clues.

• Use debugging tools: Utilize tools like breakpoints and step-through debugging to inspect code execution.

• Isolate the problem: Comment out sections of code to narrow down where the issue lies.

• Review recent changes: Look at the most recent code change...read more

Python has a vast collection of libraries for various purposes. Some popular ones are NumPy, Pandas, Matplotlib, and Scikit-learn.

• NumPy is used for numerical computing and data analysis.

• Pandas is used for data manipulation and analysis.

• Matplotlib is used for data visualization.

• Scikit-learn is used for machine learning and data mining.

• To use a library, it must be imported at the beginning of the code using the 'import' statement.

• For example, to use NumPy, we can write 'import ...read more

Code to add two objects and get results

• Use the + operator to add the values of the objects

• Ensure that the objects have compatible data types for addition

• Handle any potential errors or exceptions that may occur during the addition

SQL is a language used to manage databases, while SQL Server is a Microsoft product that includes a database management system.

• SQL is a language used to interact with databases, while SQL Server is a Microsoft product that includes a database management system.

• SQL can be used with various database management systems like MySQL, Oracle, etc., while SQL Server is specific to Microsoft.

• SQL is a standard language for querying and managing databases, while SQL Server provides addi...read more

Recursion is a programming technique where a function calls itself to solve a problem.

• Recursion involves breaking down a problem into smaller subproblems and calling the function recursively to solve them.

• Each recursive call works on a smaller input until a base case is reached to stop the recursion.

• Example: Factorial calculation, Fibonacci sequence, tree traversal.

There are several ways to read external data, such as using file input/output operations, database queries, web scraping, and API calls.

• File input/output operations: Reading data from files stored on the local system or network.

• Database queries: Retrieving data from databases using SQL or other query languages.

• Web scraping: Extracting data from websites by parsing HTML or using web scraping libraries.

• API calls: Fetching data from external systems or services through API endpo...read more

To find prime numbers in a series, iterate through each number and check if it's divisible by any number other than 1 and itself.

• Start iterating through the series of numbers

• For each number, check if it's divisible by any number other than 1 and itself

• If it's not divisible by any other number, it's a prime number

• Keep track of all the prime numbers found

Prepare thoroughly, practice responses, and stay calm to effectively handle interview and technical questions.

• Research the company and role to tailor your answers. For example, know their projects and values.

• Practice common interview questions and technical problems. Use platforms like LeetCode for coding questions.

• Use the STAR method (Situation, Task, Action, Result) to structure your responses to behavioral questions.

• Stay calm and take a moment to think before answering tec...read more

Output of a given recursive code

• Understand the logic of the recursive function

• Trace the function calls and their return values

• Identify the base case and recursive case

• Check for any errors or infinite loops

Given an array of integers, find the indices of a pair which sum results in K.

• Iterate through the array and for each element, check if K minus the element exists in the array using a hash table.

• If it exists, return the indices of both elements.

• If it doesn't exist, add the current element to the hash table.

Find the minimum difference between any two elements in an array of integers.

• Sort the array first to make it easier to find minimum differences.

• Iterate through the sorted array and calculate differences between consecutive elements.

• Keep track of the minimum difference found during the iteration.

• Example: For array [3, 8, 15, 17], after sorting: [3, 8, 15, 17], differences are 5, 7, 2. Minimum is 2.

Quicksort is a divide-and-conquer algorithm that sorts an array by partitioning it into two sub-arrays, then recursively sorting the sub-arrays.

• Choose a pivot element from the array.

• Partition the array into two sub-arrays, with elements less than the pivot in one sub-array and elements greater than the pivot in the other sub-array.

• Recursively apply the quicksort algorithm to each sub-array.

• Combine the sorted sub-arrays to obtain the final sorted array.

A program to check if a number is Palindrome or not.

• Convert the number to a string

• Reverse the string

• Compare the original string with the reversed string

• If they are equal, the number is a palindrome

• If not, the number is not a palindrome

Capture action is used to extract data from an application while record action is used to automate user actions.

• Capture action is used to capture data from an application's UI elements such as text boxes, drop-downs, etc.

• Record action is used to record user actions such as mouse clicks, keyboard inputs, etc. to automate them later.

• Capture action is used in conjunction with data scraping to extract data from web pages or desktop applications.

• Record action is used to create aut...read more

Pseducode for printing a 5 rows triangle with star elements.

• Use nested loop to print the triangle

• The outer loop will iterate for 5 rows

• The inner loop will print the stars for each row

• The number of stars to print will increase with each row