CEA 201 EVALUATION TEST QUESTIONS AND
ANSWERS SET A+
✔✔D - ✔✔Hexadecimal has a base of _________.
A. 2
B. 8
C. 10
D. 16
✔✔A - ✔✔The binary string 110111100001 is equivalent to __________.
A. DE1 (16)
B. C78 (16)
C. FF64 (16)
D. B8F (16)
✔✔B - ✔✔The _________ system uses only the numbers 0 and 1.
A. positional
B. binary
C. hexadecimal
D. decimal
✔✔C - ✔✔Decimal "10" is __________ in binary.
A. 1000
B. 0010
C. 1010
D. 0001
✔✔B - ✔✔Decimal "10" is _________ in hexadecimal.
A. 1
B. A
C. 0
D. FF
,✔✔C - ✔✔Four bits is called a _________.
A. radix point
B. byte
C. nibble
D. binary digit
✔✔A - ✔✔Another term for "base" is __________.
A. radix
B. integer
C. position
D. digit
✔✔D - ✔✔In the number 472.156 the 2 is the _________.
A. most significant digit
B. radix point
C. least significant digit
D. none of the above
✔✔B - ✔✔Binary 0101 is hexadecimal _________.
A. 0
B. 5
C. A
D. 10
✔✔T - ✔✔One drawback of sign-magnitude representation is that there are two
representations of 0.
✔✔T - ✔✔Both sign-magnitude representation and twos complement representation
use the most significant bit as a sign bit.
✔✔F - ✔✔It is not necessary for the ALU to signal when overflow occurs.
✔✔F - ✔✔Overflow can only occur if there is a carry.
✔✔T - ✔✔Compared with addition and subtraction, multiplication is a complex
operation, whether performed in hardware of software.
✔✔T - ✔✔For each 1 on the multiplier, an add and a shift operation are required; but for
each 0 only a shift is required.
✔✔T - ✔✔Addition and subtraction can be performed on numbers in twos complement
notation by treating them as unsigned integers.
✔✔F - ✔✔Booth's algorithm performs more additions and subtractions than a
straightforward algorithm.
,✔✔T - ✔✔With a fixed-point notation it is possible to represent a range of positive and
negative integers centered on or near 0.
✔✔T - ✔✔An advantage of biased representation is that nonnegative floating-point
numbers can be treated as integers for comparison purposes.
✔✔F - ✔✔For base 2 representation, a normal number is one in which the most
significant bit of the significand is zero.
✔✔T - ✔✔Actual floating-point representations include a special bit pattern to designate
zero.
✔✔T - ✔✔The numbers represented in floating-point notation are not spaced evenly
along the number line, as are fixed-point numbers.
✔✔F - ✔✔Overflow is a less serious problem because the result can generally be
satisfactorily approximated by 0.
✔✔T - ✔✔One of the trade-offs of floating-point math is that many calculations produce
results that are not exact and have to be rounded to the nearest value that the notation
can represent.
✔✔twos complement representation - ✔✔The most common scheme in implementing
the integer portion of the ALU is:
a. sign-magnitude representation
b. biased representation
c. twos complement representation
d. ones complement representation
✔✔Twos compliment - ✔✔__________ representation is almost universally used as the
processor representation for integers.
a. Biased
b. Twos compliment
c. Sign-magnitude
d. Decimal
✔✔sign extension - ✔✔Moving the sign bit to the new leftmost position and filling in with
copies of the sign bit is called _________.
a. sign extension
b. range extension
c. bit extension
d. partial extension
, ✔✔sign-magnitude - ✔✔In ________ representation the rule for forming the negation of
an integer is to invert the sign bit.
a. ones complement
b. twos complement
c. biased
d. sign-magnitude
✔✔Overflow - ✔✔________ is when the result may be larger than can be held in the
word size being used.
a.Overflow
b. Arithmetic shift
c. Underflow
d. Partial product
✔✔Multiplication - ✔✔__________ involves the generation of partial products, one for
each digit in the multiplier, which are then summed to produce the final product.
a. Addition
b. Subtraction
c. Multiplication
d. Division
✔✔mantissa - ✔✔Although considered obsolete, the term _________ is sometimes
used instead of significand.
a. minuend
b. mantissa
c. base
d. subtrahend
✔✔negative overflow - ✔✔Negative numbers less than -(2 - 2^-23) x 2 128 are called
_________.
a. positive underflow
b. positive overflow
c. negative underflow
d. negative overflow
✔✔negative underflow - ✔✔Negative numbers greater than 2^-127 are called
_________.
a. negative overflow
b. negative underflow
c. positive overflow
d. positive underflow
✔✔positive underflow - ✔✔Positive numbers less than 2^-127 are called ________.
a. positive underflow
b. positive overflow
ANSWERS SET A+
✔✔D - ✔✔Hexadecimal has a base of _________.
A. 2
B. 8
C. 10
D. 16
✔✔A - ✔✔The binary string 110111100001 is equivalent to __________.
A. DE1 (16)
B. C78 (16)
C. FF64 (16)
D. B8F (16)
✔✔B - ✔✔The _________ system uses only the numbers 0 and 1.
A. positional
B. binary
C. hexadecimal
D. decimal
✔✔C - ✔✔Decimal "10" is __________ in binary.
A. 1000
B. 0010
C. 1010
D. 0001
✔✔B - ✔✔Decimal "10" is _________ in hexadecimal.
A. 1
B. A
C. 0
D. FF
,✔✔C - ✔✔Four bits is called a _________.
A. radix point
B. byte
C. nibble
D. binary digit
✔✔A - ✔✔Another term for "base" is __________.
A. radix
B. integer
C. position
D. digit
✔✔D - ✔✔In the number 472.156 the 2 is the _________.
A. most significant digit
B. radix point
C. least significant digit
D. none of the above
✔✔B - ✔✔Binary 0101 is hexadecimal _________.
A. 0
B. 5
C. A
D. 10
✔✔T - ✔✔One drawback of sign-magnitude representation is that there are two
representations of 0.
✔✔T - ✔✔Both sign-magnitude representation and twos complement representation
use the most significant bit as a sign bit.
✔✔F - ✔✔It is not necessary for the ALU to signal when overflow occurs.
✔✔F - ✔✔Overflow can only occur if there is a carry.
✔✔T - ✔✔Compared with addition and subtraction, multiplication is a complex
operation, whether performed in hardware of software.
✔✔T - ✔✔For each 1 on the multiplier, an add and a shift operation are required; but for
each 0 only a shift is required.
✔✔T - ✔✔Addition and subtraction can be performed on numbers in twos complement
notation by treating them as unsigned integers.
✔✔F - ✔✔Booth's algorithm performs more additions and subtractions than a
straightforward algorithm.
,✔✔T - ✔✔With a fixed-point notation it is possible to represent a range of positive and
negative integers centered on or near 0.
✔✔T - ✔✔An advantage of biased representation is that nonnegative floating-point
numbers can be treated as integers for comparison purposes.
✔✔F - ✔✔For base 2 representation, a normal number is one in which the most
significant bit of the significand is zero.
✔✔T - ✔✔Actual floating-point representations include a special bit pattern to designate
zero.
✔✔T - ✔✔The numbers represented in floating-point notation are not spaced evenly
along the number line, as are fixed-point numbers.
✔✔F - ✔✔Overflow is a less serious problem because the result can generally be
satisfactorily approximated by 0.
✔✔T - ✔✔One of the trade-offs of floating-point math is that many calculations produce
results that are not exact and have to be rounded to the nearest value that the notation
can represent.
✔✔twos complement representation - ✔✔The most common scheme in implementing
the integer portion of the ALU is:
a. sign-magnitude representation
b. biased representation
c. twos complement representation
d. ones complement representation
✔✔Twos compliment - ✔✔__________ representation is almost universally used as the
processor representation for integers.
a. Biased
b. Twos compliment
c. Sign-magnitude
d. Decimal
✔✔sign extension - ✔✔Moving the sign bit to the new leftmost position and filling in with
copies of the sign bit is called _________.
a. sign extension
b. range extension
c. bit extension
d. partial extension
, ✔✔sign-magnitude - ✔✔In ________ representation the rule for forming the negation of
an integer is to invert the sign bit.
a. ones complement
b. twos complement
c. biased
d. sign-magnitude
✔✔Overflow - ✔✔________ is when the result may be larger than can be held in the
word size being used.
a.Overflow
b. Arithmetic shift
c. Underflow
d. Partial product
✔✔Multiplication - ✔✔__________ involves the generation of partial products, one for
each digit in the multiplier, which are then summed to produce the final product.
a. Addition
b. Subtraction
c. Multiplication
d. Division
✔✔mantissa - ✔✔Although considered obsolete, the term _________ is sometimes
used instead of significand.
a. minuend
b. mantissa
c. base
d. subtrahend
✔✔negative overflow - ✔✔Negative numbers less than -(2 - 2^-23) x 2 128 are called
_________.
a. positive underflow
b. positive overflow
c. negative underflow
d. negative overflow
✔✔negative underflow - ✔✔Negative numbers greater than 2^-127 are called
_________.
a. negative overflow
b. negative underflow
c. positive overflow
d. positive underflow
✔✔positive underflow - ✔✔Positive numbers less than 2^-127 are called ________.
a. positive underflow
b. positive overflow
