General programming concepts interview questions
1.
What
is VSS (Visual Source Safe) ?
You
can use VSS to secure code access among the developer and make control over the
access right, also can check for multiple version of code.
2.
Assume
you have an array that contains a number of strings (perhaps char * a[100]).
Each string is a word from the dictionary. Your task, described in high-level
terms, is to devise a way to determine and display all of the anagrams within
the array (two words are anagrams if they contain the same characters; for
example, tales and slate are anagrams.)
Begin
by sorting each element in the array in alphabetical order. So, if one element
of your array was slate, it would be rearranged to form aelst (use some
mechanism to know that the particular instance of aelst maps to slate). At this
point, you slate and tales would be identical: aelst.
Next, sort the entire array of these modified dictionary words. Now, all of the anagrams are grouped together. Finally, step through the array and display duplicate terms, mapping the sorted letters (aelst) back to the word (slate or tales).
Next, sort the entire array of these modified dictionary words. Now, all of the anagrams are grouped together. Finally, step through the array and display duplicate terms, mapping the sorted letters (aelst) back to the word (slate or tales).
3.
What
is the difference between a NULL pointer and a void pointer?
A
NULL pointer is a pointer of any type whose value is zero. A void pointer is a
pointer to an object of an unknown type, and is guaranteed to have enough bits
to hold a pointer to any object. A void pointer is not guaranteed to have
enough bits to point to a function (though in general practice it does)
4.
What
is encapsulation technique?
Hiding
data within the class and making it available only through the methods. This
technique is used to protect your class against accidental changes to fields,
which might leave the class in an inconsistent state.
5.
Definition
of Object Oriented Programming in single line?
Object
oriented programming is a programming paradigm which uses objects and its
interactions to design applications and computer programs.
6.
What
is virtual function?
The
virtual keyword means that method, property or function can be overridden
7.
What’s
a Windows process?
It’s
an application that’s running and had been allocated memory.
8.
What
is programming?
Computer
programming is writing or editing a computer program. A computer program is a
set of instructions which determine how the computer will react to input when
that program is running.
9.
What
is a debugger?
debugger
is a program in which you run another program that you are trying to debug.
Inside a debugger, you can step through your program one line or instruction at
a time, set break points and have your program run until it hits one, examine
the contents of variables and memory, and such other useful things as that.
10.
what
is a Programming language?
A
programming language is a stylized communication technique intended to be used
for controlling the behavior of a machine (often a computer). Like human
languages programming languages have syntactic and semantic rules used to
define meaning.
11.
What's the difference between a programming language, a scripting language?
The main difference between a "programming language" (C, C++
etc.) and a "scripting language" (ASP, JSP, JavaScript, VBScript) is
that code written in a programming language needs to be compiled before it is
run. Once it is compiled, it can be run any number of times.
Scripting languages, on the other hand, are interpreted at run-time. This means that every time you want to run the program, a separate program needs to read the code, interpret it, and then follow the instructions in the code. Compiled code has already been interpreted into machine language, so it is will typically execute faster because the conversion into machine language has already been done.
Scripting languages, on the other hand, are interpreted at run-time. This means that every time you want to run the program, a separate program needs to read the code, interpret it, and then follow the instructions in the code. Compiled code has already been interpreted into machine language, so it is will typically execute faster because the conversion into machine language has already been done.
