CDW Software Engineer Interview Questions and Answers

5 sections in the aptitude

Live coding test about sql and python

Q1. Advance coding round
Add your answer

Q1. Proper HR discussions
Add your answer

Q1. Basics of Java OOPS
Add your answer

How to remove duplicates from an array

Q1. Some basic questions on java
Add your answer
Q2. One coding question on Java
Add your answer

Q1. C++ fundamental
Add your answer
Q2. Reverse linked list
Add your answer

Q1. You have a list of numbers, now using stream api calculate the sum of all integers in a list ?
Ans. 
Use stream api to calculate sum of integers in a list.
• Use stream() method on the list to create a stream of elements.

• Use mapToInt() method to convert each element to an integer.

• Use sum() method to calculate the sum of all integers.
Answered by AI
View 1 more answer
Q2. Given two arrays of integers, find the one extra element in second array ? Eg. int[] arr1 = [1,3,7,8]; int[] arr2 = [3,8,7,9,1];
Ans. 
Loop through both arrays and use a hashmap to store frequency of elements, then find the extra element.
• Loop through both arrays and store frequency of elements in a hashmap

• Compare the frequency of elements in both arrays to find the extra element

• Return the extra element found in the second array
Answered by AI
View 1 more answer

Q1. Write code of palindrome
Ans. 
Code to check if a given string is a palindrome or not.
• Create a function that takes a string as input

• Remove all non-alphanumeric characters and convert to lowercase

• Compare the original string with its reverse to check for palindrome
Answered by AI
Add your answer
Q2. How to pass data in angular from component to component
Ans. 
Data can be passed in Angular from component to component using input properties, output properties, services, and state management libraries like NgRx.
• Use @Input decorator to pass data from parent to child component

• Use @Output decorator to emit events from child to parent component

• Use services to share data between components

• Use state management libraries like NgRx for complex data sharing scenarios
Answered by AI
Add your answer

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
Answered by AI
View 1 more answer
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
Answered by AI
View 1 more answer
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
Answered by AI
Add your answer
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
Answered by AI
Add your answer
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.
Answered by AI
Add your answer

Q1. Lamda experience
Add your answer