# Lost Q

61 Questions | Total Attempts: 61

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The Lost Questions

• 1.
Which of the following best describes the NOR operation?
• A.

An XOR followed by a NOT

• B.

An OR followed by a NOT

• C.

A NOT followed by a NOT C. An AND followed by a NOT

• 2.
Which of the following bit patterns cannot be expressed in hexadecimal notation?
• A.

11111111

• B.

1001

• C.

110011

• D.

100000000001

• 3.
Which of the following bit patterns represents the value 5 in two’s complement notation?
• A.

00011010

• B.

11111011

• C.

00000101

• D.

11111011

• 4.
In which of the following addition problems (using two’s complement notation) does an overflow error occur?
• A.

0011 +1010

• B.

0100 +0100

• C.

1100 +1100

• 5.
What value is represented by the bit pattern 01011100 when interpreted using floating-point format in which the most significant bit is the sign bit, the next three bits represent the exponent field in excess notation, and the last four bits represent the mantissa?
• A.

-1 1/2

• B.

1 1/2

• C.

-3/8

• D.

3/8

• 6.
Which of the following values cannot be stored accurately using a floating-point format in which the most significant bit is the sign bit, the next three bits represent the exponent field in excess notation, and the last four bits represent the mantissa?
• A.

2 1/2

• B.

3/16

• C.

7

• D.

6 1/4

• 7.
Which of the following bit-patterns represents the smallest value using the floating-point format in which the most significant bit is the sign bit, the next three bits represent the exponent field in excess notation, and the last four bits represent the mantissa?
• A.

01001000

• B.

01011000

• C.

00101000

• D.

01111000

• 8.
Which of the following mass storage system does not require physical motion?
• A.

Magnetic tape

• B.

Magnetic disk

• C.

DVDs

• D.

Flash drives

• 9.
How many errors per pattern could be corrected when using an error-correcting code in which any two code patterns differ by a Hamming distance of 8?
• A.

3

• B.

4

• C.

5

• D.

6

• 10.
How many different symbols can be encoded using Unicode?
• A.

256

• B.

4,096

• C.

65,536

• D.

1,046,476

• 11.
Which of the following instructions (as described in the language description table) places 00000000 in register A?
• A.

1A00

• B.

2A00

• C.

3A00

• D.

200A

• 12.
Which of the following instructions (as described in the language description table) places 00000000 in register 5?
• A.

25FF

• B.

9555

• C.

15FF

• D.

8555

• 13.
Which of the following instructions (as described in the language description table) is equivalent to requesting that register A be rotated to the left by three bits?
• A.

AA05

• B.

AA03

• C.

AA08

• D.

AA01

• 14.
Which of the following instructions (as described in the language description table) changes the contents of register 7?
• A.

4077

• B.

4075

• C.

4057

• D.

37BB

• 15.
Which of the following instructions does not fall in the category of arithmetic/logic instructions?
• A.

ROTATE

• B.

• C.

OR

• D.

JUMP

• 16.
Which of the following instructions falls in the category of data transfer instructions?
• A.

• B.

AND

• C.

ROTATE

• D.

JUMP

• 17.
Which of the following is not a component of a machine instruction?
• A.

Op-code

• B.

Port

• C.

Operand

• 18.
Which of the following is not an activity performed entirely within a CPU?
• A.

Fetch instructions

• B.

Perform Boolean operations

• C.

Perform arithmetic operations

• D.

Move data between registers

• 19.
What mask in register F would cause the instruction 8AAF (refer to the language description table) to put a 0 in the most significant bit of register A without disturbing the other bits?
• A.

11111110

• B.

00000001

• C.

10000000

• D.

011111111

• 20.
What mask in register F would cause the instruction 7AAF (refer to the language description table) to put a 1 in the most significant bit of register A without disturbing the other bits?
• A.

11111110

• B.

00000001

• C.

10000000

• D.

011111111

• 21.
Which of the following instructions will not produce the same result as the other two? (Refer to the language description table.)
• A.

9555

• B.

2500

• C.

1500

• 22.
Which of the following components of an operating system handles the details associated with particular peripheral equipment?
• A.

Device drivers

• B.

File manager

• C.

Memory manager

• 23.
Which of the following components of an operating system is not part of the kernel?
• A.

Shell

• B.

File manager

• C.

Scheduler

• 24.
Multitasking in a computer with only one CPU is accomplished by a technique called
• A.

Bootstrapping

• B.

Batch processing

• C.

Time sharing

• 25.
Execution of an operating system is initiated by a program called the
• A.

Window manager

• B.

Scheduler

• C.

Bootstrap

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