CrowdStrike Software Engineer Interview Questions and Answers

Q1. Oops concept ? SQL Queries ?
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60 MCQ questions are there

Q1. Simple java questions are there
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Q2. Array list vs Linked List
Ans. 
Array list is faster for accessing elements by index, while Linked List is better for frequent insertions and deletions.
• Array list has constant time access to elements by index, while Linked List requires traversing the list to find an element.

• Linked List is better for frequent insertions and deletions as it only requires changing pointers, while Array list may require shifting elements.

• Array list uses contiguous memor...read more
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About front end , html, css, reasoning,

Q1. What.is let , var, const
Ans. 
let, var, and const are keywords used in JavaScript to declare variables with different scopes and mutability.
• let is used to declare variables with block scope and allows reassignment

• var is used to declare variables with function scope and allows redeclaration

• const is used to declare variables with block scope and does not allow reassignment, but the value can still be mutable
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Q1. What is angular
Ans. 
Angular is a popular open-source front-end web application framework developed by Google.
• Angular is used for building dynamic web applications.

• It allows for the creation of single-page applications.

• Angular uses TypeScript for building applications.

• It provides features like data binding, dependency injection, and routing.

• Angular has a large community and ecosystem of libraries and tools.

• Examples: AngularJS, Angular 2, A...read more
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Q2. Services in angular
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Services in Angular are singleton objects that can be used to share data and functionality across components.
• Services are used to encapsulate reusable functionality, such as data fetching, logging, or authentication.

• Services can be injected into components, directives, or other services using Angular's dependency injection system.

• Services are typically defined using the @Injectable decorator.

• Example: A DataService serv...read more
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Q1. Communication skills.
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Q1. What is angular
Ans. 
Angular is a popular open-source front-end web application framework developed by Google.
• Angular is used for building dynamic web applications.

• It allows for the creation of single-page applications.

• Angular uses TypeScript for building applications.

• It provides features like data binding, dependency injection, and routing.

• Angular has a large community and ecosystem with many libraries and tools available.
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Q2. What is an angular
Ans. 
Angular is a popular open-source web application framework developed by Google.
• Angular is used for building dynamic web applications.

• It allows for the creation of single-page applications.

• Angular uses TypeScript for building applications.

• It provides features like data binding, dependency injection, and routing.

• Angular has a large community and ecosystem with many libraries and tools available.
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Very easy question to medium level qustions

Easy to medium level questions

Q1. Write a program Binary Search?
Ans. 
Binary search is a divide and conquer algorithm that efficiently finds the target value within a sorted array.
• Start by defining the low and high indices of the array.

• Calculate the middle index and compare the target value with the middle element.

• If the target value is less than the middle element, search the left subarray. If greater, search the right subarray.

• Repeat the process until the target value is found or the s
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Q2. What isCICD flow?
Ans. 
CI/CD flow stands for Continuous Integration/Continuous Deployment flow, which is a software development practice where code changes are automatically built, tested, and deployed.
• CI/CD flow involves automating the process of integrating code changes into a shared repository, running automated tests, and deploying the changes to production.

• Continuous Integration (CI) focuses on automating the build and testing of code c...read more
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Q3. How to handle Enum feature?
Ans. 
Enums are a feature in programming languages that allow you to define a set of named constants.
• Enums can be used to improve code readability by giving meaningful names to values

• Enums can be used in switch statements to handle different cases

• Enums can have associated values or raw values for more flexibility
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Q4. Singleton handles the Syncronized ?
Ans. 
Yes, Singleton handles synchronization by ensuring only one instance of a class is created and providing global access to that instance.
• Singleton pattern restricts the instantiation of a class to one object.

• It provides a global point of access to the instance.

• Synchronization can be implemented in the Singleton pattern to ensure thread safety.

• Example: Singleton pattern is commonly used in database connections to ensure
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Q5. What are external Libraries are used in project?
Ans. 
External libraries are pre-written code that can be imported and used in a project to provide additional functionality.
• External libraries help in reducing development time by providing ready-made solutions for common tasks.

• Examples include React for front-end development, NumPy for scientific computing in Python, and Retrofit for making network calls in Android apps.
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Q1. Find repeated nos in arrays
Ans. 
Find repeated numbers in arrays of strings
• Iterate through each string in the array

• Convert each string to an array of numbers

• Use a hash map to track the frequency of each number

• Identify and return the repeated numbers
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Q1. Current company work, reason for change, etc.
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