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Java Code Interview Questions

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we compile any program bu c:/>javac prog.java and run as c:/>java prog Here what's the meaning of c in javac. We have java Interpreter but not compiler.Then why we have to use javac. Please answer this question?

For printing a message we use System.out.println in normal programs. We use String msg="text....."; Can't we use String msg=" " in normal programs and System.out.println("........") in applets. Please answer this question?

1839write a program in java to solve a system of n-variabled simultaneous equations using the guassian elimination method. let the maximum possible value of n be 100. run the program using hypothetical values for a set of 10- variables simultaneous equations. print out the program, the input equation and the results generated by the program.

TCS,

3897write a program to input a natural number less than and display it in words.test your program on the sample data and some random data sample input= 29 sample output= Twenty nine sample input=17001 sample output= out of range sample input=119 sample output =one hundred and nineteen sample input=500 sample output=five hundred

2988wap to input a natural number less than and display it in words. test your program on the sample data and some random data sample input= 29 sample output= Twenty nine sample input=17001 sample output= out of range sample input=119 sample output =one hundred and nineteen sample input=500 sample output=five hundred

write a java program to create a Frame with three scrolls, change the back ground color of the frame using functions with values of scrolls.

3948create a slide show which has three slides,which includes only text.program should change to the new slide after 5 seconds.After the third slide program returns to the first slide.

create a MIDP application,which show to the user 4 questions.All questions have 4 possible options and one right option exactly.Application counts and shows to the user how many right answers were right and shows them to user.

Financial: credit card number validation) Credit card numbers follow certain patterns. A credit card number must have between 13 and 16 digits. It must start with: ■ 4 for Visa cards ■ 5 for Master cards ■ 37 for American Express cards ■ 6 for Discover cards In 1954, Hans Luhn of IBM proposed an algorithm for validating credit card numbers. The algorithm is useful to determine whether a card number is entered correctly or whether a credit card is scanned correctly by a scanner. All credit card numbers are generated following this validity check, commonly known as the Luhn check or the Mod 10 check, which can be described as follows (for illustration, consider the card number 4388576018402626): 1. Double every second digit from right to left. If doubling of a digit results in a two-digit number, add up the two digits to get a single-digit number. 2 * 2 = 4 2 * 2 = 4 4 * 2 = 8 1 * 2 = 2 6 * 2 = 12 (1 + 2 = 3) 5 * 2 = 10 (1 + 0 = 1) 8 * 2 = 16 (1 + 6 = 7) 4 * 2 = 8 2. Now add all single-digit numbers from Step 1. 4 + 4 + 8 + 2 + 3 + 1 + 7 + 8 = 37 3. Add all digits in the odd places from right to left in the card number. 6 + 6 + 0 + 8 + 0 + 7 + 8 + 3 = 38 4. Sum the results from Step 2 and Step 3. 37 + 38 = 75 5. If the result from Step 4 is divisible by 10, the card number is valid; otherwise, it is invalid. For example, the number 4388576018402626 is invalid, but the number 4388576018410707 is valid. Write a program that prompts the user to enter a credit card number as a long integer. Display whether the number is valid or invalid. Design your program to use the following methods: /** Return true if the card number is valid */ public static boolean isValid(long number) /** Get the result from Step 2 */ public static int sumOfDoubleEvenPlace(long number) /** Return this number if it is a single digit, otherwise, return * the sum of the two digits */ public static int getDigit(int number) /** Return sum of odd place digits in number */ public static int sumOfOddPlace(long number) /** Return true if the digit d is a prefix for number */ public static boolean prefixMatched(long number, int d) /** Return the number of digits in d */ public static int getSize(long d) /** Return the first k number of digits from number. If the * number of digits in number is less than k, return

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Un-Answered Questions { Java Code }

Financial: credit card number validation) Credit card numbers follow certain patterns. A credit card number must have between 13 and 16 digits. It must start with: ■ 4 for Visa cards ■ 5 for Master cards ■ 37 for American Express cards ■ 6 for Discover cards In 1954, Hans Luhn of IBM proposed an algorithm for validating credit card numbers. The algorithm is useful to determine whether a card number is entered correctly or whether a credit card is scanned correctly by a scanner. All credit card numbers are generated following this validity check, commonly known as the Luhn check or the Mod 10 check, which can be described as follows (for illustration, consider the card number 4388576018402626): 1. Double every second digit from right to left. If doubling of a digit results in a two-digit number, add up the two digits to get a single-digit number. 2 * 2 = 4 2 * 2 = 4 4 * 2 = 8 1 * 2 = 2 6 * 2 = 12 (1 + 2 = 3) 5 * 2 = 10 (1 + 0 = 1) 8 * 2 = 16 (1 + 6 = 7) 4 * 2 = 8 2. Now add all single-digit numbers from Step 1. 4 + 4 + 8 + 2 + 3 + 1 + 7 + 8 = 37 3. Add all digits in the odd places from right to left in the card number. 6 + 6 + 0 + 8 + 0 + 7 + 8 + 3 = 38 4. Sum the results from Step 2 and Step 3. 37 + 38 = 75 5. If the result from Step 4 is divisible by 10, the card number is valid; otherwise, it is invalid. For example, the number 4388576018402626 is invalid, but the number 4388576018410707 is valid. Write a program that prompts the user to enter a credit card number as a long integer. Display whether the number is valid or invalid. Design your program to use the following methods: /** Return true if the card number is valid */ public static boolean isValid(long number) /** Get the result from Step 2 */ public static int sumOfDoubleEvenPlace(long number) /** Return this number if it is a single digit, otherwise, return * the sum of the two digits */ public static int getDigit(int number) /** Return sum of odd place digits in number */ public static int sumOfOddPlace(long number) /** Return true if the digit d is a prefix for number */ public static boolean prefixMatched(long number, int d) /** Return the number of digits in d */ public static int getSize(long d) /** Return the first k number of digits from number. If the * number of digits in number is less than k, return

write a program in java to find the moving average of all prime numbers between 2 and 100.

For printing a message we use System.out.println in normal programs. We use String msg="text....."; Can't we use String msg=" " in normal programs and System.out.println("........") in applets. Please answer this question?

A game that has five levels of play has the score for each level stored in an array. You are to write a program that goes through that array and finds: a) the minimum score, and the level at which it occurred b) the maximum score, and the level at which it occurred c)the average score for all five levels The score data you must use for this program are as follows: Game Level Score 1 450 2 316 3 148 Stack implementations is mandatory.

plz send code for manage group of hotels in j2ee frontend:J2EE Backend: DB2 Express

write a program to input a natural number less than and display it in words.test your program on the sample data and some random data sample input= 29 sample output= Twenty nine sample input=17001 sample output= out of range sample input=119 sample output =one hundred and nineteen sample input=500 sample output=five hundred

How to run the Result Intemation System project in java for collage student in which result of internal exam marks send on parents mobile using SMS? what software required to run this project? please reply immediately...

Do you think about CMM(Capability Maturity Model) process?

What is Generic" J2ME architecture?

plz send code for Ecorps in j2ee frontend:J2EE Backend: DB2 Express

How can I create connection two blue-tooth mobile in j2me. please urgent

what are the other loops except for for,while,do while and until?

Is there any static classes are in java give some examples

what is runtime class?

In java, why do we set thread priority, when we know that there is no guarantee by which a thread should be execute?