Integer Representation & Overflow MCQs

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

Practice Integer Representation & Overflow 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 is the range of an 8-bit signed integer in two's complement?

-127 to 127
0 to 255
-128 to 127
-128 to 128

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What is the 8-bit two's complement representation of -5?

00000101
11111010
10000101
11111011

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In C++, what happens when a signed int overflows (for example, INT_MAX + 1)?

A std::overflow_error is thrown
Undefined behavior
It saturates at INT_MAX
It wraps to INT_MIN as guaranteed by the standard

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In C++, given unsigned int u = 0; u--;, what is u on a system with 32-bit int?

0
-1
Undefined behavior
4294967295

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What does this C++ code print? if (-1 < 1u) cout << "yes"; else cout << "no";

Compilation error
no
yes
Undefined behavior

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In Python 3, what is the result of 2 ** 100?

It wraps around to a negative number
The exact integer 1267650600228229401496703205376
OverflowError
A float in scientific notation

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What is the result of adding 01111111 + 00000001 as 8-bit two's complement integers?

11111111, which represents -1
10000000, which represents 128
10000000, which represents -128 (signed overflow)
00000000 with a carry

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Which representation has two representations of zero (+0 and -0)?

Excess-128 only
Unsigned binary
Sign-magnitude (and one's complement)
Two's complement

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What is the one's complement of the 4-bit value 0101?

0101
1010
1011
1101

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What is the maximum value of an unsigned 16-bit integer?

32767
65536
65535
32768

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