Data Types In Java! Trivia Questions Quiz
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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 your knowledge of the two and how they are applied.
- 1.
Groovy has a literal form for each of its numeric literals except BigDecimal.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
There is a literal form for a BigDecimal value namely 1.23G.Rate this question:
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- 2.
Following this Groovy declaration, Integer i, the variable i has a fixed, non-changing type.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
True, variable i's type cannot be changed.Rate this question:
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- 3.
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.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
True. This is also true for reversing the roles of the quotes, e.g. "Hello 'John' ".Rate this question:
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- 4.
The find operator =~ returns a Boolean value indicating whether one string is found within another string.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The find operator =~ returns a Matcher value, not a Boolean value. The Matcher value itself can be tested for its truthiness.Rate this question:
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- 5.
What is printed by the following Groovy code?def x = 1/2def y = 1/2println x+y
- A.
0 // since 1/2 uses integer division to produce 0
- B.
1 // since 1/2 + 1/2 = 1
- C.
1.0 // since .5 + .5 = 1.0
Correct Answer
C. 1.0 // since .5 + .5 = 1.0Explanation
Since both x and y are dynamically typed and are assigned 1/2 or .5, the answer is 1.0.Rate this question:
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- 6.
The subscript read operator a[b] is mapped to
- A.
Get()
- B.
GetAt()
- C.
Index()
- D.
IndexAt()
Correct Answer
B. GetAt()Explanation
It's mapped to "getAt()" method.Rate this question:
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- 7.
String interpolation performs expression evaluation when the expression following $ is enclosed in (two words) _____ _____.
Correct Answer
curly braces
curly bracketsExplanation
"1+1 = ${1+1}" // curly bracesRate this question:
- 8.
If you want integer division results in Groovy, you must "escape" to Java coding
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Not true. Use a cast (int) or call the intdiv() method.Rate this question:
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- 9.
The 'as type' operator acts like a cast operator.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
True (mostly). Groovy's 'as type' may actually generate some code to do the conversion. A Java cast rarely generates code.Rate this question:
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- 10.
The Number class is augmented in Groovy with the method(s):
- A.
Upto()
- B.
Downto()
- C.
Step()
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
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.Rate this question:
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Current Version
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Mar 10, 2024Quiz Edited by
ProProfs Editorial Team -
Aug 07, 2014Quiz Created by
Catherine Halcomb
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