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Mcq Modul 06
Correct ans
Question 1
The length of a double typed variable:
  
is hardware dependent

Correct!
  
is defined by IEEE754 standard

  
is defined by the "C" language standards

  
is user defined


Question 2
1 / 1 pts
Removing the letter 'f' from both literals used in the following expression:
printf("%f", 43210.f + .56789f);
  
will cause compilation error

  
will change the value printed to stdout

Correct!
  
is illegal

  
won't change the value printed to stdout


Question 3
1 / 1 pts
The three parts of a float values are deployed in the following order:
  
exponent, sign, significand

  
sign, exponent, significand

  
exponent, significand, sign

Correct!
  
sign, significand, exponent


Question 4
1 / 1 pts
The number of significant digits stored in a float value
  
is the bigger the smaller is the value

  
changes randomly

Correct!
  
depends on the value's precision

  
is the smaller the larger is the value


Question 5
1 / 1 pts
If you put a pin in a random place of number line, the distance to closest representable float value is:
Correct!
  
not greater than half of ULP

  
equal to ULP

  
greater than ULP

  
equal to half of ULP


Question 6
1 / 1 pts
Dividing non-zero float value by zeroed float value produces:
  
a NaN result

  
a -inf result

  
abnormal program termination

Correct!
  
a +inf result


Question 7
1 / 1 pts
Assuming that the STDC FENV_ACCESS is et ON, the result of the following expression shown on 5 digits after decimal point:
float f = 8.f / 9.f;
  
is always 0.88888

  
depends on hardware platform

Correct!
  
depends on rounding mode currently set

  
is always 0.88889


Question 8
1 / 1 pts
The symbol named PRIdMAX is designed to be used by:
  
the gets() function

  
the printf() function

Correct!
  
the scanf() function

  
the puts() function


Question 9
1 / 1 pts
The type named int_fast8_t is designed to choose the fastest:
  
floating point routines

  
way of compiling integer expressions

Correct!
  
of possible integer arithmetic implementations


method of transmitting integer values through stdin/stdout streams

Question 10
1 / 1 pts
The GMP library uses the mpz_t type to represent:
Correct!
  
multiprecision integer values

  
multiprecision float values

  
multiprecision rational values

  
multiprecision double values


Question 11
1 / 1 pts
Assuming that the x variable is of type float, the following condition:
x == x + 1.
Correct!
  
is unpredictable

  
is invalid

  
is always false

  
is always true


Question 12
1 / 1 pts
The difference between doubles and floats lies in fact, that:
Correct!

doubles have wider range and offer better precision
  
doubles are faster

  
doubles have wider range

  
doubles offer better precision


Question 13
1 / 1 pts
The longest part of a float value is:
  
all parts have equal sizes

Correct!
  
significand

  
sign

  
exponent


Question 14
1 / 1 pts
The absolute values of numbers representable in 32 bit IEEE754 number come from the range:
Correct!
  
1.175494e-38 .. 3.402823e+38

  
1.175494e-38 .. +inf

  
0.0 .. +inf

  
0.0 .. 3.402823e+38


Question 15
1 / 1 pts
The normalized float value:
Correct!
  
has the highest significand's bit set to 1

  
has the highest exponent's bit set to 1

  
has the highest exponent's bit set to 0

  
has the highest significand's bit set to 0


Question 16
1 / 1 pts
Dividing zeroed float value by zeroed float value produces:
  
abnormal program termination

  
a -inf result

  
a +inf result

Correct!
  
a NaN result


Question 17
1 / 1 pts
The FE_TOWARDZERO rounding mode can make:

positive numbers lesser and negative numbers bigger

negative numbers bigger while positive numbers remain untouched

positive numbers lesser while negative numbers remain untouched
Correct!

positive numbers bigger and negative numbers lesser

Question 18
1 / 1 pts
The rounding mode may be changed by means of the:
  
feroundmode() function

Correct!
  
fesetround() function

  
roundmode() function

  
setround() function


Question 19
1 / 1 pts
To output a 32 bit unsigned int value as hex number some would use the following portable specifier:
Correct!
  
PRIx32

  
"%32x"

  
PRIuMAX

  
"%32bx"


Question 20
1 / 1 pts
A function named mpf_set() is used by GMP library to:
Correct!

copy a multiprecision float variable to another variable

copy a regular float variable to regular double variable

copy a multiprecision float variable to regular float variable

copy a regular float variable to multiprecision float variable