Java Pyramid -2

1. create an interactive program that produces the following pyramid.

                                     1

                  212

                 32123

                4321234

               543212345

 Java code: 

import java.util.Scanner;

class Project_4_Bonus {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String choice = "Y";

        do {
            cal_Pyramid();
            System.out.print("continue ? >>> (Y/N): ");
            choice = sc.next();
            System.out.println("\n");
        } while (choice.equalsIgnoreCase("Y"));
    } //end

    public static void cal_Pyramid() {
        System.out.print("Enter the highest number of pyramid : ");
        Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();

        for (int i = 1; i <= x; i++) {

            for (int j = 1; j <= x - i; j++) {
                System.out.print("  ");
            }

            for (int k = i; k >= 1; k--) {
                if (k >= 10) {
                    System.out.print(k);
                } else {
                    System.out.print(" " + k);
                }
            }

            for (int k = 2; k <= i; k++) {
                System.out.print((k >= 10) ? k : " " + k);
            }
            System.out.println();
        }
    }
}

Java- Pyramid Patterns -1

Java Pyramid Patterns by using  methods:


import java.util.Scanner;
 public class Classmate
 {
static int choice;
public static void main(String args[])
{
Scanner ms=new Scanner(System.in);
System.out.print("Enter a number:");
choice=ms.nextInt();
patternA();
patternB();
patternC();
patternD();

}
public static void patternA()
{
System.out.println("Pattern A");
for(int x=1; x<=choice; x++)
{
for(int y=1; y<=x; y++)
{
System.out.print("*");
}
System.out.println();
}
}
public static void patternD()
{
System.out.println("Pattern D");
for(int x=0; x<choice; x++)
{
for(int y=-1; y<x; y++)
System.out.print(" ");
for(int y=x; y<choice; y++)
System.out.print("*");
    System.out.println();
}
}
public static void patternC()
{
System.out.println("Pattern C");
for(int x=choice; x>=1; x--)
{
for(int y=1; y<=x; y++)
{
System.out.print("*");
}
System.out.println();
}
}
public static void patternB()
{
System.out.println("Pattern B");
for(int x=choice; x>=1; x--)
{
for(int y=1; y<x; y++)
System.out.print(" ");
for(int y=x; y<=choice; y++)
System.out.print("*");
    System.out.println();
}
         }
 }

  





Result:


Enter a number: 4

PatternA:
*
**
***
****

PatternB:
   *
  **
 ***
****

PatternC:
****
***
**
*

PatternD:
****
 ***
  **
   *

Continue? (y/n):
----------------------------------------------

Java Sample questions with answers -1

2 points   

Question 31

1.         

Although it is not a requirement of any programming language, it frequently makes sense to use ____ as all or part of a variable’s name if the variable that holds a status.

Answer

		the verb to be
		a verb
		the word status
		the abbreviation stat

2 points   

Question 32

1.         

Boolean expressions are named after ____.

Answer

		Harold Boolean
		Henry Boole
		George Boole
		Gerhardt Boolean

2 points   

Question 33

1.         

Which of the following is a Java inline comment?

Answer

		//
		#
		$
		REM

2 points   

Question 34

1.         

When you need to ask multiple questions before an outcome is determined, you must create a(n) ____ condition.

Answer

		dual-alternative
		nested
		single-alternative
		compound

2 points   

Question 35

1.         

A series of nested if statements can also be called a(n) ____ statement.

Answer

		n-alternative if
		cascading if
		case
		loop

2 points   

Question 36

1.         

____ are diagrams used in mathematics and logic to help describe the truth of an entire expression based on the truth of its parts.

Answer

		Decision matrices
		Decision diagrams
		Truth diagrams
		Truth tables

2 points   

Question 37

1.         

For maximum efficiency, a good rule of thumb in an OR decision is to ____.

Answer

		first ask the question that is more likely to be true
		first ask the question that is more likely to be false
		rewrite as an and decision and ask the question more likely to be true
		rewrite as an and decision and ask the question more likely to be false

2 points   

Question 38

1.         

The type of nested if-then-else structure that could be replaced with a case structure is ____.

Answer

		inner nested if within the if portion of the outer if
		inner if within the else portion of the outer if
		one that uses a logical AND
		one that uses a logical OR

2 points   

Question 39

1.         

When creating a decision table, you must determine how many possible Boolean value combinations exist for the conditions. If there are two conditions, ____ combinations will exist.

Answer

		2
		4
		8
		16

2 points   

Question 40

1.         

The first step in a loop is typically ____.

Answer

		compare the variable to a value that determines if the loop stops or continues
		initialize the variable
		increment the variable
		perform the loop action

2 points   

Question 41

1.         

The last step in a loop is usually ____.

Answer

		compare the variable to a value that determines if the loop stops or continues
		initialize the variable
		increment the variable
		perform the loop action

2 points   

Question 42

1.         

The piece of pseudocode that represents incrementing the loop control variable is ____.

Answer

		rep = 1
		rep = rep + 1
		while (rep < 5)
		print “warning”

2 points   

Question 43

1.         

When a value is incremented ____.

Answer

		1 is added to the value
		1 is subtracted from the value
		the value is multiplied by 1
		the value is divided by 1

2 points   

Question 44

1.         

A loop within another loop is known as a(n) ____ loop.

Answer

		indefinite
		infinite
		nested
		hidden

2 points   

Question 45

1.         

When one loop appears inside another, the loop that contains the other loop is called the ____ loop.

Answer

		indefinite
		definite
		inner
		outer

2 points   

Question 46

1.         

When a loop control variable is not altered during loop execution, a(n) ____ loop may result.

Answer

		enlarged
		infinite
		broken
		default

2 points   

Question 47

1.         

The ____ loop provides three actions in one compact statement.

Answer

		for
		while
		do until
		repeat

2 points   

Question 48

1.         

In a for loop, a(n) ____ value is used to control how the loop control variable is incremented.

Answer

		step
		group
		id
		sentinel

2 points   

Question 49

1.         

Sometimes a ____ loop is called a repeat until loop.

Answer

		for
		while
		do until
		repeat

2 points   

Question 50

1.         

The statement that is true of a structured loop is that ____.

Answer

		the loop can exit from any point
		the loop body must execute at least once
		the loop condition represents the only exit from the loop
		the loop can repeat an infinite number of times

2 points   

  Answers:

·         Question 1

2 out of 2 points

	When data items are stored for use on computer systems, they are often stored in what is known as a data hierarchy. Answer
	Selected Answer:  True

·         Question 2

2 out of 2 points

	Whenever a main program calls a module, the logic transfers to the main program. Answer
	Selected Answer:  False

·         Question 3

2 out of 2 points

	When you must satisfy two or more criteria to initiate an event in a program, you must make sure that the second decision is made entirely independently of the first decision. Answer
	Selected Answer:  False

·         Question 4

2 out of 2 points

	A decision table consists of four parts. Answer
	Selected Answer:  True

·         Question 5

2 out of 2 points

	____ data items may involve organizing them, checking them for accuracy, or performing mathematical operations on them. Answer
	Selected Answer:    Processing

·         Question 6

2 out of 2 points

	____ errors are detected by a compiler. Answer
	Selected Answer:    Syntax

·         Question 7

2 out of 2 points

	After a programmer plans the logic of a program, the next step is ____. Answer
	Selected Answer:    coding the program

·         Question 8

2 out of 2 points

	Typically, a programmer develops a program’s logic, writes the code, and then ____ the program, which may generate a list of syntax errors. Answer
	Selected Answer:    compiles

·         Question 9

2 out of 2 points

	Using ____ involves writing down all the steps you will use in a program. Answer
	Selected Answer:    pseudocode

·         Question 10

2 out of 2 points

	A variable name is also called a(n) ____. Answer
	Selected Answer:    identifier

·         Question 11

2 out of 2 points

	The best choice for a variable name representing an interest rate is ____. Answer
	Selected Answer:    interest

·         Question 12

2 out of 2 points

	A program with a(n) ____ never ends. Answer
	Selected Answer:    infinite loop

·         Question 13

2 out of 2 points

	If a flowchart has six processing steps and a page provides room for only three, you can use a ____ to create the completed flowchart. Answer
	Selected Answer:    connector

·         Question 14

2 out of 2 points

	The problem with the following statement is that ____. 100 = grade Answer
	Selected Answer:    the value on the left must be a variable name

·         Question 15

2 out of 2 points

	The following pseudocode is an example of a(n) ____ structure:   get number   while number is positive     add to sum     get number Answer
	Selected Answer:    loop

·         Question 16

2 out of 2 points

	Another name for a loop structure is ____. Answer
	Selected Answer:    iteration

·         Question 17

2 out of 2 points

	The maximum number of entry points that any programming structure can have is ____. Answer
	Selected Answer:    one

·         Question 18

2 out of 2 points

	Suppose a program will read 100 data records, and you read the first data record in a statement that is separate from the other 99. This is called a ____ read. Answer
	Selected Answer:    priming

·         Question 19

2 out of 2 points

	One way to straighten out a flowchart segment that is not structured is to use what is called the “____” method. Answer
	Selected Answer:    spaghetti bowl

·         Question 20

2 out of 2 points

	A case structure can be replaced by one or more ____ structures. Answer
	Selected Answer:    if-then-else

·         Question 21

2 out of 2 points

	____ documentation includes all the supporting paperwork that programmers develop before they write a program. Answer
	Selected Answer:    External program

·         Question 22

2 out of 2 points

	The ____ of documentation is typically written first. Answer
	Selected Answer:    output

·         Question 23

2 out of 2 points

	If you are producing a report from stored data, you frequently will be provided with a(n) ____ that describes the data contained in a file. Answer
	Selected Answer:    file description

·         Question 24

2 out of 2 points

	____ is the process of paying attention to important properties while ignoring nonessential details. Answer
	Selected Answer:    Abstraction

·         Question 25

2 out of 2 points

	Newer ____ programming languages allow you to use English-like vocabulary in which one broad statement corresponds to dozens of machine instructions. Answer
	Selected Answer:    high-level

·         Question 26

2 out of 2 points

	If a subroutine or function is useful and well-written, you may want to use it more than once within a program or in other programs. This is known as ____. Answer
	Selected Answer:    reusability

·         Question 27

2 out of 2 points

	In a flowchart, you draw each module separately with its own sentinel symbols. The symbol that is the equivalent of the start symbol in a program contains the ____. Answer
	Selected Answer:    name of the module

·         Question 28

2 out of 2 points

	The ____ statement is used to indicate the end of a module. Answer
	Selected Answer:    return

·         Question 29

2 out of 2 points

	The computer keeps track of the correct memory address to which it should return after executing a module by recording the memory address in a location known as the ____. Answer
	Selected Answer:    stack

·         Question 30

2 out of 2 points

	A variable that is used known to the entire program is a ____ variable. Answer
	Selected Answer:    global

·         Question 31

2 out of 2 points

	Although it is not a requirement of any programming language, it frequently makes sense to use ____ as all or part of a variable’s name if the variable that holds a status. Answer
	Selected Answer:    the verb to be

·         Question 32

2 out of 2 points

	Boolean expressions are named after ____. Answer
	Selected Answer:    George Boole

·         Question 33

2 out of 2 points

	Which of the following is a Java inline comment? Answer
	Selected Answer:    //

·         Question 34

2 out of 2 points

	When you need to ask multiple questions before an outcome is determined, you must create a(n) ____ condition. Answer
	Selected Answer:    compound

·         Question 35

2 out of 2 points

	A series of nested if statements can also be called a(n) ____ statement. Answer
	Selected Answer:    cascading if

·         Question 36

2 out of 2 points

	____ are diagrams used in mathematics and logic to help describe the truth of an entire expression based on the truth of its parts. Answer
	Selected Answer:    Truth tables

·         Question 37

2 out of 2 points

	For maximum efficiency, a good rule of thumb in an OR decision is to ____. Answer
	Selected Answer:    first ask the question that is more likely to be true

·         Question 38

2 out of 2 points

	The type of nested if-then-else structure that could be replaced with a case structure is ____. Answer
	Selected Answer:    inner if within the else portion of the outer if

·         Question 39

2 out of 2 points

	When creating a decision table, you must determine how many possible Boolean value combinations exist for the conditions. If there are two conditions, ____ combinations will exist. Answer
	Selected Answer:    4

·         Question 40

2 out of 2 points

	The first step in a loop is typically ____. Answer
	Selected Answer:    initialize the variable

·         Question 41

2 out of 2 points

	The last step in a loop is usually ____. Answer
	Selected Answer:    increment the variable

·         Question 42

2 out of 2 points

	The piece of pseudocode that represents incrementing the loop control variable is ____. Answer
	Selected Answer:    rep = rep + 1

·         Question 43

2 out of 2 points

	When a value is incremented ____. Answer
	Selected Answer:    1 is added to the value

·         Question 44

2 out of 2 points

	A loop within another loop is known as a(n) ____ loop. Answer
	Selected Answer:    nested

·         Question 45

2 out of 2 points

	When one loop appears inside another, the loop that contains the other loop is called the ____ loop. Answer
	Selected Answer:    outer

·         Question 46

2 out of 2 points

	When a loop control variable is not altered during loop execution, a(n) ____ loop may result. Answer
	Selected Answer:    infinite

·         Question 47

2 out of 2 points

	The ____ loop provides three actions in one compact statement. Answer
	Selected Answer:    for

·         Question 48

2 out of 2 points

	In a for loop, a(n) ____ value is used to control how the loop control variable is incremented. Answer
	Selected Answer:    step

·         Question 49

2 out of 2 points

	Sometimes a ____ loop is called a repeat until loop. Answer
	Selected Answer:    do until

·         Question 50

2 out of 2 points

	The statement that is true of a structured loop is that ____. Answer
	Selected Answer:    the loop condition represents the only exit from the loop