50 Programming Interview Q & A

Question 1

What is Computer programming?

Answer 1

Programming is the process of taking an algorithm and encoding it into a notation, a programming language, so that it can be executed by a computer. Although many programming languages and many different types of computers exist, the important first step is the need to have the solution. Without an algorithm there can be no program.

Question 2

What is computer science?

Answer 2

Computer science is the study of problems, problem-solving, and the solutions that come out of the problem-solving process. Given a problem, a computer scientist’s goal is to develop an algorithm, a step-by-step list of instructions for solving any instance of the problem that might arise.

Question 3

What are algorithms?

Answer 3

Algorithms are finite processes that if followed will solve the problem or accomplish a particular task. Algorithms are solutions. An algorithm should be clear, finite and effective.

Question 4

What is a full-stack developer?

Answer 4

A full stack developer is the culmination of all of the different phases of web development: the front-end, the back-end, and the database. Being proficient in each of those areas is what makes a full stack developer!

Question 5

How does programming work?

Answer 5

Programming contains a set of instructions for the computer to perform different tasks. In fact, those instructions are executable commands, each having a different purpose.

Question 6

What is debugging?

Answer 6

Debugging is the process of finding and removing errors in a program. In this process, the program is thoroughly checked for errors. Then errors are pointed out and debugged.

Question 7

What is the front-end?

Answer 7

The Front End, also referred to as the client-side, is where the user interacts with your web application. The front end development will always use the same three languages: HTML, CSS, and JavaScript.

Question 8

What are some front end libraries and frameworks?

Answer 8

The front end can also include JavaScript libraries and frameworks such as jQuery, AngularJS, ReactJS, and BackboneJS, all of which require quite a bit of code and allows front end developers to create extremely complex, interactive and dynamic web applications!

Question 9

Name different types errors which can occur during the execution of a program?

Answer 9

There are three types of errors which can occur during the execution of a program:

• Syntax Errors
• Runtime Errors
• Logical errors

Question 10

When does a syntax error occurs?

Answer 10

A syntax error occurs when the program violates one or more grammatical rules of the programming language. These errors are detected at compile time, i.e., when the translator (compiler or interpreter) attempts to translate the program.

Question 11

When does a runtime error occurs?

Answer 11

A runtime error occurs when the computer is directed to perform an illegal operation by the program such as dividing a number by zero. Runtime errors are the only errors which are displayed immediately during the execution of a program. When these errors occur, the computer stops the execution of the programming and can display a diagnostic message that will help in locating the error.

Question 12

When does a logical error occurs?

Answer 12

The logical error happens when a program implements a wrong logic and produces an incorrect result or unexpected behavior. The translator (compiler or interpreter) does not report any error message for a logical error. These errors are the most difficult to locate.

Question 13

What is flowchart?

Answer 13

The flowchart is a pictorial representation of a program which helps in understanding the flow of control and data in the algorithm.

Question 14

What do you understand by the term “Maintain and update the Program”?

Answer 14

Program maintenance is an ongoing process of upgrading the program to accommodate new hardware or software requirements and introducing minor or great improvements. Essentially, it is the expansion, updating and improvement of a program after its installation.

Question 15

What are variables?

Answer 15

Variables are named memory locations (memory cells) which are used to store program’s input and its computational results during program execution. As the name suggests, the value of a variable may change during the program execution.

Question 16

What are reserved words?

Answer 16

Reserved words or keywords are the words, which have predefined meanings. They have predefined uses and cannot be used or redefined for any other purpose in a programming language.
Examples:
  IF
  ELSE
  THEN

Question 17

What are loops?

Answer 17

The loop is a structure which can repeat a set of statements up to a fixed number of times or until a certain criterion is satisfied.

Question 18

Name different types of loops.

Answer 18

Different types of loops are

• FOR…NEXT Loop
• WHILE…WEND Loop
• Nested Loop

Question 19

What is continuous integration?

Answer 19

Continuous Integration (CI) is a development practice that requires developers to integrate code into a shared repository several times a day. Each check-in is then verified by an automated build, allowing teams to detect problems early.

By integrating regularly, you can detect errors quickly, and locate them more easily.

Question 20

What are some benefits of continuous integration?

Answer 20

Continuous Integration brings multiple benefits to your organization:

No long and tense integration (save time)
Increase visibility enabling greater communication
Catch issues early and nip them in the bud
Spend less time debugging and more time adding features
Build a solid foundation
Stop waiting to find out if your code’s going to work
Reduce integration problems allowing you to deliver software more rapidly

Question 21

What is PTC Integrity?

Answer 21

PTC Integrity Lifecycle Manager (formerly MKS Integrity) is a software system lifecycle management (SSLM) and application lifecycle management (ALM) platform developed by MKS Inc. and was first released in 2001. The software is client/server, with both desktop (java/swing) and web client interfaces. It provides software development organizations with a collaborative environment in which they can manage the end-to-end processes of development, from requirements management, engineering change management, revision control, and build management to test management and software deployment as well as associated reports & metrics.

Question 22

What does PTC Integrity allow development teams to do?

Answer 22

PTC Integrity Lifecycle Manager (Integrity LM or ILM) allows software development teams to track all aspects of their work, including work items, source control, reporting, and build management, in a single product.