Top Accenture Computer Science Interview Questions and Answers for Freshers (2026)
Prepare for Accenture Computer Science interviews with the most frequently asked technical interview questions on SDLC, networking, C/C++, OOP, DBMS, programming, and core computer science concepts.
Top Accenture Computer Science Interview Questions
Below are some of the most commonly asked Computer Science interview questions reported by candidates during Accenture's technical interview rounds. Practice these concepts along with your own explanations to perform confidently.
1. What are the different stages of the Software Development Life Cycle (SDLC)?
The Software Development Life Cycle (SDLC) consists of Requirement Analysis, Planning, System Design, Development (Coding), Testing, Deployment, and Maintenance. Each phase helps deliver high-quality software in a structured and efficient manner.
2. Explain IPv4 and IPv6. What are the key differences?
IPv4 is a 32-bit addressing system that supports around 4.3 billion unique addresses, while IPv6 is a 128-bit addressing system designed to provide an almost unlimited number of IP addresses. IPv6 offers better security, improved routing efficiency, and eliminates the need for NAT in most cases.
3. What are the similarities and differences between C and C++?
Both C and C++ are compiled programming languages with similar syntax. However, C is a procedural language, whereas C++ supports object-oriented programming concepts such as classes, inheritance, polymorphism, and encapsulation. C++ also includes features like templates, exception handling, and function overloading.
4. Define polymorphism and explain its types.
Polymorphism is an object-oriented programming concept that allows the same interface to perform different tasks. It has two types: Compile-time polymorphism (function overloading and operator overloading) and Runtime polymorphism (method overriding using virtual functions).
5. Explain the role of a preprocessor in C/C++.
The preprocessor executes before compilation. It processes directives such as #include, #define, #ifdef, and macro expansions. It helps include header files, define constants, and perform conditional compilation.
6. Write a program to determine whether an input number is a prime number.
#include <iostream>
using namespace std;
int main() {
int n;
cin >> n;
bool prime = true;
if (n <= 1)
prime = false;
for (int i = 2; i * i <= n; i++) {
if (n % i == 0) {
prime = false;
break;
}
}
if (prime)
cout << "Prime";
else
cout << "Not Prime";
return 0;
}The program checks whether the given number has any divisor other than 1 and itself. The loop runs only up to the square root of the number, making it more efficient.
7. Differentiate between CHAR and VARCHAR data types in DBMS.
CHAR stores fixed-length strings and always occupies the specified amount of storage. VARCHAR stores variable-length strings and uses only the required storage space, making it more memory-efficient for varying text lengths.
8. What is the difference between a macro and a regular function?
A macro is expanded by the preprocessor before compilation and does not involve function call overhead. A regular function is compiled separately, provides type checking, supports debugging, and is generally safer and easier to maintain.
9. What do you mean by platform independence? Why is it important?
Platform independence means a program can run on different operating systems or hardware without modification. Java achieves this using the Java Virtual Machine (JVM). It reduces development effort, improves portability, and allows software to reach a wider audience.
Interview Tip
During Accenture interviews, avoid giving one-line definitions. Explain each concept with a practical example or real-world use case. Interviewers often ask follow-up questions to test conceptual understanding rather than memorized answers.