30 Interview Questions and Answers for Computer Science
For freshmen and experienced applicants looking to land their ideal job, here are some sample computer science interview questions. Highest Paying IT certifications
A computer system is a combination of memory, CPU, peripheral devices that are connected to it, and OS (Operating System).
2) List out components of a computer system
The components of a computer system are:
CPU (Central Processing Unit) including control unit and arithmetic logic unit
Memory like primary and secondary
Input and output devices like keyboard mouse, printer scanner, etc.
3) What is a microprocessor?
A microprocessor is an integrated circuit having all the functionality of a central processing unit of a PC.
4) Explain the class variable
Variables represent a memory of class, which it shares with each and every instance.
5) What is SDLC?
SDLC stands for Software Development Life Cycle is a process that produces quality software products in less time. The stages involved by SDLC are: 1) planning, 2) design, 4) construction, 5) testing, and 6) deployment.
A file is a named location that stores information or data permanently. It is always stored in the storage device using a file name with primary and secondary names, which is separated by a “.”(DOT).
7) What is a programming language?
A programming language is a collection of grammar rules for giving instructions to computer or computing devices in order to perform achieve task.
8) What is Integrated Development Environment?
An IDE is a GUI-based software program. It is designed to help programmers build applications with all the needed programs and libraries.
9) Explain the framework
The framework is a platform for making software applications. It provides the basis on which developers can build programs for a specific platform. For example, a framework may include predetermined classes as well as functions. It can be used to process inputs, manage hardware, and interact with system software.
The interface is similar to a class in Java, but it is a collection of abstract methods. A class can have more than one interface.
11) What is a class?
A class is a blueprint for creating objects. A class contains methods and variables which are class instances.
12) Distinguish between abstract class and interface
The difference between class and interface is:
Abstract class
Interface
Abstract class does not support inheritance.
The interface supports multiple inheritances.
An abstract class would contain constructor.
The interface does not contain a constructor.
An abstract class is declared using the “Abstract” keyword.
The interface is declared using the “interface” keyword.
It can be used with all access modifiers.
It can be used with only public access modifier.
13) What is an abstract class?
A class having an abstract keyword is called an abstract class.
14) What is an array?
An array is a container that keeps a specific number of similar data types.
15) What is a constructor?
A constructor is a method that is used to create a class object. It prepares the new object for use, often accepting arguments that the constructor uses to set required member variables.
Cin and Cout are objects used for input and output files, respectively.
17) What is the difference between C and C++?
The difference between C and C++ is:
C
C++
It is a Procedural Oriented language.
It is an Object-Oriented Programming language.
C language follows a Top-Down programming approach
C++ follows a bottom-up programming approach.
The file extension of a C program is .c
The file extension of a c+ + program language is.cpp
In the C programming language, a big program code is divided into small pieces, which is called functions.
In the C++ programming language, a big program code is divided into Objects and Classes.
Structure in C does not provide the feature of function declaration.
Structure in C++ provides the feature of declaring a function as a member function of the structure.
18) List the types of constructors
There are two types of constructors: 1) parameterized constructor and 2) default constructor.
19) What is artificial intelligence?
Artificial Intelligence or machine intelligence is a common term that is used to build smart machines capable of performing tasks. The main aim of AI is to solve problems in a way that are better and faster.
Artificial Intelligence is defined as the ability of a digital computer or computer-controlled robot (Intelligent entity) to perform tasks intelligently without being explicitly instructed.
20) What is machine learning?
Machine Learning is a system that can learn from an excellent example through self-improvement and without being explicitly coded by a programmer.
21) What is deep learning?
Deep learning is computer software that mimics the network of neurons in a brain. It is a subset of machine learning and is called deep learning because it makes use of deep neural networks. It is a field that is based on learning and improving on its own by examining computer algorithm
22) List out different OOPS principles?
The basic OOPS principle are: 1) encapsulation, 2) abstraction, 3) inheritance and 4) polymorphism.
23) Explain the various type of access modifiers
There are four types of access modifiers:
Private: Visible to a particular class
Public: Visible to the world
Protected: Visible to specific packages as well as subclass
