Floating Point MCQs

12 MCQs — Data Types MCQs (Page 1 of 2)

Practice Floating Point MCQs with correct answers and explanations. These questions are from the Data Types MCQs section.

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Data Types Subcategories

Arrays & Memory Layout	Characters & Strings
Floating Point	Integer Representation & Overflow
Number Systems & Literals	Pointers & References
Primitive Types & Sizes	Python Built-in Types
Structures, Unions & Enums	Type Conversion & Casting
Typing Disciplines & ADTs

What does Python's 0.1 + 0.2 == 0.3 evaluate to?

True
TypeError
It depends on the operating system
False

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Which of these decimal values can be represented exactly in binary floating point?

0.1
0.3
0.2
0.375

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How are the 64 bits of an IEEE 754 double-precision number divided?

1 sign bit, 15 exponent bits, 48 fraction bits
1 sign bit, 11 exponent bits, 52 fraction bits
1 sign bit, 8 exponent bits, 55 fraction bits
2 sign bits, 10 exponent bits, 52 fraction bits

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Approximately how many significant decimal digits do float and double provide?

Both about 7
float about 7; double about 15–16
float about 3; double about 7
float about 15; double about 30

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In C++ or Java, what does the expression NaN == NaN evaluate to?

Undefined behavior
true
false
It throws an exception

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In Python, what does 1.0 / 0.0 produce?

ZeroDivisionError
0.0
nan
inf

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In Java, what does 1.0 / 0 evaluate to?

NaN
An ArithmeticException is thrown
0
Infinity

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What are round(2.5) and round(0.5) in Python 3?

2 and 1
3 and 1
2 and 0
3 and 0

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In C++, given float f = 0.1f; double d = 0.1;, what does f == d evaluate to?

true
false
Compilation error
Undefined behavior

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What does float('inf') > 10**1000 evaluate to in Python?

TypeError
False
True
OverflowError

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