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Q271. Write code to print a Pyramid pattern ?

Ans. public static void printTriagle(int n)
{
// outer loop to handle number of rows
// n in this case
for (int i=0; i1; j--)
{
// printing spaces
System.out.print(" ");
}

// inner loop to handle number of columns
// values changing acc. to outer loop
for (int j=0; j<=i; j )
{
// printing stars
System.out.print("* ");
}

// ending line after each row
System.out.println();
}
}

// Driver Function
public static void main(String args[])
{
int n = 5;
printTriagle(n);
}

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Q272. Can we have multiple inheritance in java using abstract class ?

Ans. No

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Q273. What is the difference between abstraction and abstract class ?

Ans. Abstract class is one of the facility for achieving abstraction in Java.

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Q274. Difference between == and === ?

Ans. == compares values === is used in scripting languages for comparing two values as well as there data tpe. like in js,php.

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Q275. How to calculate string length without using inbuilt function

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Q276. What is the following code doing ?

private static final String[] COLORS = new String[] { "Red", "Green", "Blue" };

Ans. We are initializing a static and constant string array named as COLORS using Strings "Red","Green" and "Blue".

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Q277. Have you used Java 8 Lambda expressions ?

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Q278. Write a Program to print a pattern ?

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Q279. Which of the following is insertion heavy - HashSet or TreeSet ?

Ans. TreeSet as it needs elements in a particular order

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Q280. What is the difference between TreeSet and TreeMap ?

Ans. TreeSet contains only values as elements whereas TreeMap contains Key value pairs.

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Q281. How executor service is better than using primitive Threading mechanism using Thread class or runnable Interface ?

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Q282. How does encoding affect using Reader / writer classes or Stream classes in Java ?

Ans. Which group of bytes represent which character is defined by character encoding. So when reading character by character from a stream of bytes using Reader, specifying character encoding becomes significant as the same group of bytes can represent different character in different character encoding(Eg UTF-8 and UTF-16 etc.)

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Q283. How do you debug Javascript code ?

Ans. Possible Answer - I use either Firebug or Chrome Developer tool.

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Q284. What is the difference between Java OR operator and Java script OR operator ?

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Q285. Can you name few Java packages which you frequently used ?

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Q286. is Java top down programming language or bottom up programming language?

Ans. bottom up programming language

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Q287. Write Java code that would cause deadlock ?

Ans. https://howtodoinjava.com/java/multi-threading/writing-a-deadlock-and-resolving-in-java/

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Q288. how is the internal code for the "volatile" implemented ?

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Q289. Can methods without a return type be declared in Java? Is there a difference between void return type and no return type ?

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Q290. What is the default execution method in Java?

Ans. public static void main(String[] args)

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Q291. What will happen if there is an exception in Java finally block ?

Ans. The regular behavior of exception handling will occur. It will look for any immediate catch handler and if none is provided, it would be transmitted to the callers until a catch handler is found or it's out of main function.

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Q292. Difference between final and finally

Ans. final can be used for variables , methods and class. A final variable cannot be changed , a final method cannot be overridden , a final class cannot be inherited.

Finally is a block which is used after Try and catch, a finally block is always executed.

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Q293. Tell about shallow and deep cloning ?

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Q294. Difference between 32 bit and 64 bit JVM ?

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Q295. How do we do Inheritance in Java ?

Ans. By extending class or implementing interface.

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Q296. What is Dynamic Binding ?

Ans. Dynamic Binding happens at runtime. Method overriding is an example of Dynamic Binding

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Q297. Which is the best collections for maintaining elements in an order ?

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Q298. Which statement is used to exit a function in java script ?

Ans. return

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Q299. How can java script access a database ?

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Q300. what is event handler script ?

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