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Java 8 Java technologies Quiz

Java 8 Java technologies Quiz

Features of Java 8. Highlighting feature of Java SE 8 is the implementation of Lambda expressions and supporting features to the Java programming language and platform. ... A new lightweight, high performance implementation of JavaScript engine is integrated to JDk and is available to Java applications via existing APIs. JAVA 8 is a major feature release of JAVA programming language development. Its initial version was released on 18 March 2014. With the Java 8 release, Java provided supports for functional programming,

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Quiz Questions And Answers

What is a data type ?

The calculator of the CPU
A portion of the main memory used to store data.
A special scheme to represent values ??in bit patterns.

How many bit patterns can a single bit represent?

1
2
3

What is a primitive data type in Java ?

A method to represent values ??that are so useful that they are an integral part of the language.
An easy way to represent numbers.
The part of Java that matches the older programming languages.

Does every variable in Java need a data type?

Yes – every variable must be declared with its data type.
No – only numeric variables need a data type.
No – a data type is optional.

What is NOT a name of a primitive data type in Java?

int
string
stand-in

Is the value ONE always represented by the same bit sequence?

Yes – there is only one “one”, so there is only one bit sequence.
No – “one” can be represented by different integer or floating point data types.
Yes – it is always stored in one bit

Suppose a particular data item does not use a primitive data type. What does it have to be?

An object.
A number.
A literal.

How many digits is the decimal precision of the following number: +1200004.5

4
5
8th

Can chardata be stored in the main memory of the computer?

No – computers can only save numbers.
Yes – a primitive data type is used to save it.
No -; the computer can only save patterns.

In which of the following answers does the number of bits increase from the least (left) to the most (right)?

byte long short int
int byte short long
byte short int long

Which of the following is a reserved word ?

boolean
apple
7up

Which of the following is NOT a correct variable name?

2schlecht
zero
derLetzteWertVonAllen

Which of the following declarations is NOT correct?

double duty;
float credit;
boolean value = 12;

What does the following program output? class question4 { public static void main (String [] args) { int costs = 8; int number = 5; System.out.println(“Total cost:” + (cost * num)

Total cost: + 40
Total cost: 40
Total cost: 8 * 5

Which of the following shows the syntax of an assignment statement?

variable name = expression ;
expression = expression ;
expression = variable name ;
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