Data Types In Java! Trivia Questions Quiz

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| By Catherine Halcomb
Catherine Halcomb
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| Attempts: 143 | Questions: 10
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1. If you want integer division results in Groovy, you must "escape" to Java coding

Explanation

Not true. Use a cast (int) or call the intdiv() method.

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Data Types In Java! Trivia Questions Quiz - Quiz

Below is a Data Types in Java Trivia Questions Quiz. There are two data types in java, and this is primitive and non-primitive. The main difference between the two is that one is already defined by java, and the programmer creates the other. Take the quiz and get to refresh... see moreyour knowledge of the two and how they are applied. see less

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2. The Number class is augmented in Groovy with the method(s):

Explanation

In Groovy, the Number class is augmented with the methods "upto()", "downto()", and "step()". The "upto()" method is used to iterate from the current number up to a specified number, while the "downto()" method is used to iterate from the current number down to a specified number. The "step()" method is used to iterate from the current number to a specified number with a given step size. Therefore, all of the given options are correct as they represent the methods that are added to the Number class in Groovy.

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3. The 'as type' operator acts like a cast operator.

Explanation

True (mostly). Groovy's 'as type' may actually generate some code to do the conversion. A Java cast rarely generates code.

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4. Following this Groovy declaration, Integer i, the variable i has a fixed, non-changing type.

Explanation

True, variable i's type cannot be changed.

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5. The subscript read operator a[b] is mapped to

Explanation

It's mapped to "getAt()" method.

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6. The find operator =~ returns a Boolean value indicating whether one string is found within another string.

Explanation

The find operator =~ returns a Matcher value, not a Boolean value. The Matcher value itself can be tested for its truthiness.

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7. What is printed by the following Groovy code?def x = 1/2def y = 1/2println x+y 

Explanation

Since both x and y are dynamically typed and are assigned 1/2 or .5, the answer is 1.0.

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8. Groovy has a literal form for each of its numeric literals except BigDecimal.

Explanation

There is a literal form for a BigDecimal value namely 1.23G.

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9. Groovy is like JavaScript in that you can enclose a double quoted string within a single quoted string (e.g. 'Hello "John" ') without escaping each double quote.

Explanation

True. This is also true for reversing the roles of the quotes, e.g. "Hello 'John' ".

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10. String interpolation performs expression evaluation when the expression following $ is enclosed in (two words) _____ _____.

Explanation

"1+1 = ${1+1}" // curly braces

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If you want integer division results in Groovy, you must...
The Number class is augmented in Groovy with the method(s):
The 'as type' operator acts like a cast operator.
Following this Groovy declaration, Integer i, the variable i has a...
The subscript read operator a[b] is mapped to
The find operator =~ returns a Boolean value indicating whether one...
What is printed by the following Groovy code?def x = 1/2def y =...
Groovy has a literal form for each of its numeric literals except...
Groovy is like JavaScript in that you can enclose a double quoted...
String interpolation performs expression evaluation when the...
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