BCA 1st. Sem IT Question and Answer

What is booting?
Booting is a process in which your computer gets initialized. This process includes initilizing all your hadware components in your computer and get them to work together and to load your default operating system which will make your computer operational.

What is a single user system??
A single-user operating system is a type of operating system (OS) that is developed and intended for use on a computer or similar machine that will only have a single user at any given time. This is the most common type of OS used on a home computer, as well as on computers in offices and other work environments. There are two general types of single-user operating system: single task and multitasking systems. Though a single-user operating system can be connected to other systems through a network, it is still truly only used by a single person and is different than a multi-user OS.

What is a time-sharing system?
Time-sharing is the sharing of a computing resource among many users by means of multiprogramming and multi-tasking. Its introduction in the 1960s, and emergence as the prominent model of computing in the 1970s, represents a major technological shift in the history of computing….

BCA 1st. Sem. Math Question and Answers

Graphical representation of distributions.???????????
28.1 INTRODUCTION
Whenever verbal problems involving a certain situation is presented visually before the
learners, it makes easier for the learner to understand the problem and attempt its solution.
Similarly, when the data are presented pictorially (or graphically) before the learners, it makes
the presentation eye-catching and more intelligible. The learners can easily see the salient
features of the data and interpret them.
There are many forms of representing data graphically. They are
(i) Bar graphs
(ii) Histograms
(iii) Frequency polygons
(iv) Ogive
(v) Pictographs
(vi) Pie charts
In this lesson, we shall learn to read and draw Bar graphs, Histograms and Frequency polygons,
and graphs related to day-to-day use, like temperature-time graph, velocity-time graph,
pressure-volume graph, etc. Other form of graphs are beyond the scope of the present lesson.

New C Question and Answers

Long integer

A long integer can represent a whole integer number whose range is greater than or equal to that of a standard integer on the same machine.

A long integer in one programming language may be different in size from a long integer in a different language or processor. In some languages this size is fixed across platforms, while in others it is machine dependent. In some languages this data type does not exist at all.

A long integer commonly requires double the storage capacity of a standard integer, although this is not always the case.

Short integer

A short integer can represent a whole number which may take less storage, while having a smaller range, compared with a standard integer on the same machine.

A short integer in one programming language may be a different size in a different language or on a different processor. In some languages this size is fixed across platforms, while in others it is machine-dependent. In some languages this datatype does not exist at all.

In C, it is denoted by short. It is required to be at least 16 bits, and is often smaller than a standard integer, but this is not required. A conforming program can assume that it can safely store values between −(2¹⁵−1) and 2¹⁵−1, but it may not assume that the range isn't larger. In Java, a short is always a 16-bit integer. In the Windows API, the datatype SHORT is defined as a 16-bit signed integer on all machines.

C Programing Questions/ Answers

1.Difference Between Entry Controlled Loop And Exit Controlled Loop?

Entry Comtrolled will check the Condition at First and
doesn’t execute if it is False.
Exit Controlled will check the Condition at Last and at
least once the statement will execute though it is False .
Entry control is otherwise called as WHILE loop,because the
while loop checks the condition at first, and then only
execute the following instructions.

Exit control is also called as DO WHILE loop, because the do-while loop checks the condition at last

2. limitations of getchar and scanf

If you simply want to read a single character from stdin, then getchar() is the appropriate choice. If you have more complicated requirements, then getchar() won’t be sufficient.
• getc() allows you to read from a different stream (say, one opened with fopen());
• scanf() allows you to read more than just a single character at a time.
The most common error when using getchar() is to try and use a char variable to store the result. You need to use an int variable, since the range of values getchar() returns is “a value in the range of unsigned char, plus the single negative value EOF”. A char variable doesn’t have sufficient range for this, which can mean that you can confuse a completely valid character return withEOF. The same applies to getch().