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”.
