1. Fill in the
blanks:
(1) In computer
programming Algorithm refers to a precise
method that a computer can use to solve a problem.
(2) An algorithm
must always terminate after a finite
number of steps.
(3) The person
who writes the program is called a programmer.
(4) Selection or
branching involves making a choice.
(5) The diamond
shaped flowchart symbol is called DECISION BOX.
(6) In a
flowchart, the beginning and the end of a program are indicated by TERMINAL BOX.
(7) A Loop is where a part of instructions are repeated
until a condition or result is achieved.
(8) Coding means writing the program in computer
language.
(9) BASIC,FORTAN
and C++ are examples of High level
language.
(10) Every
statement in a BASIC program should be
begin with a Line Number.
(11) A BASIC
program file is saved with a extension .Bas.
(12) Character
string enclosed within quotation marks is called a string
constant.
(13) In BASIC
program, 9.81 is a numeric constant while
“9.81” is a string constant.
(14) In a BASIC
program , A0 is a numeric variable while C$ is a string
variable.
(15) The PRINT statement is used to display numbers and
text on the monitor screen.
(16) The INPUT statement displays a question mark on the
screen and waits for the user to enter data for the program.
2. Distinguish between:
|
[1] Algorithm
|
Flow
Chart
|
|
Algorithm
is a finite step to solve a problem.
|
Algorithm
is difficult to understand, when compared to flow chart.
|
|
Flow
chart is diagrammatical representation of an algorithm.
|
Flow
chart is very easy to understand.
|
|
[2] Process Box
|
Decision
Box
|
|
Process
box shows arithmetic operation on number, or the string
|
Decision
Box shows the condition evaluated for selection.
|
|
processing
operation on strings of characters.
|
|
|
[3] Numeric Constant
|
String
Constant
|
|
A
numeric constant is a number. Eg. 16.5.
|
A
string constant is a character string enclosed in quotation mark. Eg. “Navaneet”
|
|
[4] Numeric Variable
|
String
Variable
|
|
A
variable which can be assigned a numeric value is called a numeric variable.
|
A
variable to which a string constant may be assigned is called a string variable
|
3.
Match the following
|
[1]
Column A
|
Column
B
|
|
1) INPUT A$
|
(a) Take a string constant from the user and
assign it to a sting variable.
|
|
2) PRINT A$
|
(b)
Display the value of a string variable on the monitor screen.
|
|
3) LET A = 40
|
(c)
Assign a numerical constant to the numerical variable A.
|
|
4) READ A
|
(d)
Assign a numerical constant to the numerical variable A.
|
4.State whether
the following statements are true or false :
(1) The
statement PRINT A will display the capital letter A. True.
(2) In a BASIC
program, a READ statement must have at least one accompanying DATA statement. True.
(3) DOLLAR $ is
a valid string variable. False.
(4) The CLS
statement should appear preferably at the end of the BASIC program. False.
(5) Every Basic
Program should have a END statement at the end of the program. True.
(6) It is not
necessary to give a line number in a BASIC program. False.
(7) The BASIC
expression 8^-3 means the cube root of 8. False.
(8) A PRINT
statement displays a question mark on the screen. False.
(9) REM
statements are displayed on the monitor screen as input prompts for the user. False.
(10) If A= 16.3 and B= 21.8, then the BASIC
statement LET B=A will change the value of B but not that of A. False.
5.Answer the
following questions in one or two sentences each :
(1)What is a program?
Ans. The
complete set of instruction to solve a problem (in computer language) in a
finite number of steps is called a program.
(2)What is an algorithm?
Ans. Algorithm
is a finite step to solve a problem.
(3)What is a flow chart?
Ans. Flow chart
is diagrammatical representation of an algorithm.
(4)What is a numeric expression?
Ans. Any
ordinary algebraic expressions involving numeric constants and variables are
called numeric expression.
(5)What is meant
by string concatenation?
Ans. It is process of combining string and string
variables, one behind other.
(6)What is branching? what is conditional branching?
Ans. The
transfer control from one part of program to another is called branching. If a
branching is based on the outcome of a logical decision is called conditional
Branching.
(7)What is compiler?
Ans. A compiler
is built in program which creates machine code instruction from the high level
language.
(8)What is an interpreter?
Ans. An
interpreter translates and executes high level language line by line.
(9Name four
commonly used high-level languages.
Ans. FORTAN,
APL, BASIC and C++.
(10)What does the acronym “BASIC” stand for?
Ans. Beginners
All-purpose Symbolic Instruction Code.
(11)When and by whom BASIC was originally developed?
Ans. The BASIC
language was created by John Kemeny and Thomas Kurtz at mouth College, U.S.A.,
in 1964.
(12)In Basic what symbols are used to indicate addition,
subtraction, multiplication, division and exponentiation?
Ans. + = Addition, - = Subtraction, * =
multiplication, / = subtraction and ^ = exponentiation.
6.What are the uses of the following flowchart symbols?
(1)Terminal box:
Marks the beginning (START) and editing (STOP) of the program flow.
(2)Process box :
Shows the arithmetic operation on numbers, or the string.
(3)Decision box
:Shows the condition evaluated for selection.
7.Write the
basic expression for :
1)Raising 2 to
the power 5: 2^5
2)A3-7B+1:
(A^3) - (7*B) +1
3)5(F-32) : (5*(F-32))/9
4)AMT=PRIN
(1+RATE/100)N. PRIN * (1+(RATE/100)) N.
8.Identify the
valid numeric Variables: M, N7, P$, Q#, INT, 7B.
Ans. M, N7, INT,
7B
9.Identify the
valid string Constant : “Navaneet, “NPIL”,”INFO-TECH”,34.35,”9.8”.
Ans.
“NPIL”,”INFO-TECH”,”9.8”.