Which of the following is true concerning Web services standards?
Common Gateway Interface (CGI) is which of the following?
Which of the following is a group of one or more attributes that uniquely identifies a row?
When the values in one or more attributes being used as a foreign key must exist in another set of one or more attributes in another table, we have created a(n):
A relation is considered a:
In the relational model, relationships between relations or tables are created by using:
A functional dependency is a relationship between or among:
Table is synonymous with the term:
Which of the following is not a restriction for a table to be a relation?
For some relations, changing the data can have undesirable consequences called:
A key:
An attribute is a(n):
A relation in this form is free of all modification anomalies.
If attributes A and B determine attribute C, then it is also true that:
A tuple is a(n):
If attribute A determines both attributes B and C, then it is also true that:
One solution to the multivalued dependency constraint problem is to:
The ALU carries out arithmetic and logic operations. It processes _____ numbers rather than decimal numbers.
Conversion of decimal number 7110 to it's binary number equivalent is
Which of the following flip-flops is free from race around problem?
Conversion of decimal number 6710 to it's octal number equivalent is
A NOR gate has two or more input signals. All input must be _____ to get a high output
The inverter OR gate and AND gate are called decision-making elements because they can recognize some input _____ while disregarding others. A gate recognizes a word when its output is _____
A positive AND gate is also a negative
In which code the successive code characters differ in only one bit position?
Conversion of binary number 1011012 to hexadecimal is
ASCII and EBCDIC differ in
A p- channel enhancement type MOSFET performs much the same function as a PNP transistor, except that
De Morgan's second therm says that NAND gate is equivalent to a bubbled _____ gate.
What logic function is produced by adding an inverter to each input and the output of an AND gate?
When a transistor is cut off or saturated, transistor _____ have almost no effect
Express -7 as 16-bit signed binary numbers.
With an RS latch a high S and low R sets the output to _____ ; a low S and a high R _____ the output to low.
Flip-flop outputs are always
The output 0 and 1 levels for TTL logic family is approximately
A _____ TTL device can sink up to 16mA and can source up to 400 MA.
What is the 2's complement of 0011 0101 1001 1100 number?
Digital design often starts by constructing a _____ table.
The hexadecimal digits are 0 to 9 and A to _____
The ASCII
An OR gate has 6 inputs. What is the only input word that produces a 0 output?
A diagram that illustrates the ore (Logic) of functions in a progran called a
The Gray code for decimal 7 is
The time required for a pulse to decrease from 90 to 10 percent of its maximum value is known as
Conversion of binary number 1010000101112 to hexadecimal number is
_____dominates the LSI field, and _____ is used extensively where lowest power consumption is necessary.
Conversion of an octal number 1438 to its decimal number is
How many inputs signals can a gate have?
A combinational logic circuit which is used when it is desired to send data from two or more source through a single transmission line is known as
Conversion of binary number 10010012 to hexadecimal is
Which logic family dissipates the minimum power?
What logic function is obtained by adding an inverter to the inputs of an AND gate?
A bus is a group of _____ carrying digital signals.
The simplified form of the Boolean expression (X + Y + XY)(X + Z) is
De Morgan's first theorem says that a NOR gate is equivalent to a bubbled _____ gate.
Addition of 102 and 112 is
How many bits are required to encode all twenty six letters ten symbols, and ten numerals?
An inverter is also called a _____ gate.
Conversion of decimal number 1310 to it's octal number equivalent is
The binary number 1100 0101 has _____ bytes
With a NAND latch a low R and a low S produce a _____ condition.
Which of the following logic families has the highest noise immunity?
Conversion of decimal number 6110 to it's binary number equivalent is
An OR gate can be imagined as
Address 200H contains the byte 3FH. What is the decimal equivalent of 3FH
Conversion of an octal number 1128 to hexadecimal number is
The functional difference between SR flip-flop and JK flip-flop is that
Conversion of an octal number 1108 to its decimal number is
Computer ICs work reliably because they are based on _____ design.
The maximum count which a 6-bit binary word can represent is
A half-adder is also known as:
Why are digital circuits easier to design than analog circuits?
Conversion of binary number 1100012 to its decimal number is
The OR gate has two or more input signals. If any input is _____ the output is high.
How many memory locations can 14 address bits access?
The ASCII code is a 7-bit code for
The EXCLUSIVE - NOR gate is equivalent to an _____ gate followed by an invertor.
The 2's compliment of binary number 010111.1100 is
In boolean algebra, the times sign stands for the _____ operation
What logic function is obtained by adding an inverter to the output of an AND gate?
Conversion of an octal number 74328 to a binary number is
Conversion of an octal number 1438 to hexadecimal number is
The memory cell of a dynamic RAM is simpler and smaller than the memory cell of a _____ RAM.
A byte is consist of _____ bits
What is the 1's complement of 0000 1111 0010 1101 number?
Addition of 11012 and 10102 is
A NAND gate is equivalent to an AND gate followed by an inverter. All inputs must be _____ to get a low output
What logic function is produced by adding an inverter to the output of an AND gate?
Conversion of decimal number 2810 to it's octal number equivalent is
Division of 1000112 by 1012 is
The NOR gate is logically equivalent to an OR gate followed by an _____
The dynamic race hazard problem occurs in
Resistor Ratio design is used in linear ICs because
What advantages do ICs have over discrete-device circuits due to their greater complexity (i.e. more circuitary in less area)
Conversion of an octal number 1368 to hexadecimal number is
The control and arithmetic-logic sections are called the _____
How many full adders are required to construct an m- bit parallel adder?
The number of binary bits required to represent a hexadecimal digit is
Instead of counting with binary numbers, a ring counter uses words that have a single high _____
For what logic gate the outputs in complement of the input?
What is the decimal equivalent of 210?
The maximum number of TTL loads that a TTL device can drive reliably over the specified temperature range is
Conversion of hexadecimal number 6B216 to it's binary number equivalent is
The output of the following gate is 0 only if at least one of the inputs is 1:
In which of the following adder circuits, the carry look ripple delay is eliminated?
With positive clocking the clock signal must be _____ for the flip-flop to respond.
Conversion of binary number 10100002 to an octal number is
Conversion of an octal number 478 to its binary number is
A _____ is a group of devices that store digital data.
Conversion of an octal number 31378 to it's decimal equivalent is
Semiconductor memory is:
If a microcomputer has a 64K memory, what are the hexadecimal notations for the first and last memory location?
A microprocessor has memory locations from 0000 to 3FFF. Each memory location stores 1 byte. How bytes can the memory store? Express this in kilobytes?
The m-bit parallel adder consists of:
An OR gate has 6 inputs. How many input words are in its truth table?
Which TTL sub-family has maximum speed?
The hexadecimal number system is widely used in analyzing and programming ______
A combinational logic circuit which is used to send data coming from a single source to two or more separate destinations is called as
How many full and half-adders are required to add 16-bit numbers?
An odd-parity generator produces an odd-parity bit to go along with the data. The parity of the transmitted data is _____ An XOR gate can test each received word for parity rejecting words with _____ parity.
A gate is a logic circuit with one or more input signals but _____ output signal.
The _____ is ultraviolet-light-erasable and electrically programmable. This allows the user to erase and store until programs and data are perfected.
The logic 1 in positive logic system is represented by:
Conversion of decimal number 9910 to it's binary number equivalent is
The number of two-input NAND gates required to produce the two-input OR function is
A 2's-complement adder-subtracter can add or subtract binary numbers. Sign-magnitude numbers represent _____ decimal numbers, and 2's complements stand for _____ decimal numbers.
Which of the following is not functionally a complete set?
The fan-out capability of a digital building block can be defined as
Conversion of binary number 11000012 to hexadecimal is
The main advantage of hexadecimal numbers is the case of conversion from hexadecimal to _____ and vice versa.
Which of the following TTL subfamily is the fastest
The leading bit stands for the _____ and the remaining bits for the _____ is known as signed binary numbers.
A multiplexer is also known as
Standard TTL has a multiple emitter input transistor and a _____ output
A shift register moves the _____ left or right. Serial loading means storing a word in a shift register by entering _____ bit per clock pulse. With parallel or broadside loading, it takes only one _____ pulse to load the input word.
A flip-flop can store:
A logic circuit which is used to change a BCD number into an equivalent decimal number is
Cyclic codes are used in
The digits used in a binary number system are _____ and _____
The 2-input XOR gate has a high output only when the input bits are _____
Conversion of binary number 10010102 to to its decimal number is
A combinational logic circuit which generates particular binary word or number is
The 1's compliment of binary number 11010 is:
Conversion of binary number 1100002 to hexadecimal is
Conversion of binary number 1000112 to an octal number is
What table shows the electrical state of a digital circuit's output for every possible combination of electrical states in the inputs?
What is the hexadecimal equivalent of a binary number 10101111
The two basic technologies for digital ICs are bipolar and MOS. Bipolar technology is preferred for_____ and _____ whereas MOS technology is better suited to LSI.
Small-scale integration, abbreviated _____ refers to fewer than 12 gates on the same chip. Medium-scale integration (MSI) means 12 to 100 gates per chip. And large-scale integration (LSI) refers to more than _____ gates per chip.
How many outputs signals can a gate have?
Conversion of an octal number 1258 to its decimal number is
What is the main advantage of using MOSFET rather than bipolar transistor circuitary in ICs?
The term sum-of-products in boolean algebra means
A shift register can be used for:
Names, numbers, and other information needed to solve a problem are called _____
A typical microcomputer may have up to 65,536 registers in its memory. Each of these registers, usually called a _____
Conversion of binary number 100000000002 to decimal number is
Conversion of binary number 111112 to an octal number is
Conversion of binary number 1011102 to an octal number is
A binary adder is a logic circuit that can add _____ binary numbers at a time.
A half-adder adds _____ bits
The 2764 is 65,536-bit EPROM organized as 8,192 words of 8 bits each. How many address lines does it have?
What does 4k represent?
Conversion of decimal number 4210 to it's octal number equivalent is
In boolean algebra, the overbar stands for the NOT operation, the plus sign stands for the _____ operation.
The reduced form of the Boolean expression (A+B)(A+C) is:
A full-adder adds _____ bits, and producing a SUM and a _____
The radix of the binary number is:
An XOR gate recognizes only words with an _____ number of 1's.
Conversion of 10110112 to it's decimal equivalent is
The octal equivalent of decimal 324.987 is
One way to simplify the sum-of-products equation is to use boolean algebra. Another way is the _____ map.
With a JK master-slave flip-flop the master is cocked when the clock is _____ and the slave is triggered when the clock is _____
The 7400 series, also called standard TTL, contains a variety of SSI and _____ chips that allow us to build all kinds of digital circuits and systems.
Conversion of decimal number 9910 to hexadecimal number is
Conversion of binary number 11011001111110002 to hexadecimal number is
When the LOAD input of a buffer register is active, the input word is stored on the next positive _____ edge.
Addition of 1101011012, 1110111012, 0001111112, 1001011012, 1111101112 is
A demultiplexer is also known as
Conversion of a octal number 638 to its decimal number is
Binary means _____
For an input pulse train of clock period T, the delay produced by an n stage shift register is
_____ is the fastest logic family; it's used in high-speed applications.
Conversion of a hexadecimal number 6316 to binary number is
Which function positive logic is equivalent to OR function in negative logic?
Conversion of binary number 1011012 to its decimal number is
FETs are used in linear ICs to:
A flip-flop can store
Which of the following is the first integrated logic family?
A flip-flop is a _____ element that stores a binary digit as a low or high voltage.
Conversion of decimal number 8910 it's binary number equivalent is
An AND gate has 7 inputs. How many input word are in its truth table?
When an inverter is placed between both inputs of an SR flip-flop, the resulting flip-flop is
Arithmetic operation are coded in
Which of the following electronic component is not found in ordinary ICs?
A shift register can be used for
Which of the following logic families use bipolar transistors?
Which of the following Boolean algebra rules is wrong?
Conversion of an octal number 608 to binary number is
Conversion of binary number 11000112 to hexadecimal is
Conversion of binary number 11000112 to its decimal number is
Conversion of binary number 11000112 to an octal number is
A preliminary guide for comparing the simplicity of logic circuits is to count the number of input _____ leads.
An AND gate has 7 inputs, what is the only input word that produces a 1 output?
Convert the 1000 0000 0000 1111 signed binary number to decimal number.
The _____ is a sequence of instructions that tells the computer how to process the data.
The output of the following gate is 1 only if at least one of its inputs is 0.
The highest decimal number that can be represented with 10 binary digits is
The clock signals are used in sequential logic circuits
The XOR gates are ideal for testing parity because even-parity words produce a _____ output and odd-parity words produce a _____ output
Which of the following is not true?
_____ has become the most widely used bipolar family.
The functional capacity of SSI devices is
The master slave JK flip-flop is effectively a combination of
_____is an abbreviation for binary digit.
An inventor is a gate with only _____ input; the output is always in the opposite state from the input
Parallel adders are
A microcomputer is a computer that uses a _____ for its CPU.
Which of the following is a universal gate?
The number of input words in a truth table always equals _____ where n is the number of inputs bits.
Multiplication of 478 by 528 is
Which of the following boolean algebra statements represent commutative law
Binary-Coded-decimal (BCD) numbers express each digit as a _____
Computers use thousands of flip-flops. To coordinate the overall action, a common signal called the _____ is sent to each flip-flop.
Conversion of decimal number 9310 to hexadecimal number is
Conversion of decimal number 9910 to it's octal number equivalent is
The 2's compliment of binary number 0.01011 is:
The _____ gate has two or more input signals. All inputs must be high to get a high output
Conversion of hexadecimal number 93FA16 to it's binary number equivalent is
BCD numbers are useful whenever _____ information is transferred into or out of a digital system.
A NOR gate recognizes only the input word whose bits are _____
How many bytes are there in 1011 1001 0110 1110 numbers?
Consider as RS flip-flops with both inputs set to 0. If a momentary '1' is applied at the input S, then the output
Which of the following logic expression is wrong?
Subtraction of 1001011002 from 11101010102 is
Addition of 1101012 and 1011112 is
Conversion of an octal number 1348 to a binary number is
What is the ASCII code for T?
Express 8192 in K units.
The functional capacity for LSI devices is
What is the 2's-complement representation of -24 in a 16-bit microcomputer?
Which gates is known as universal gate?
While working with MS-DOS, which command is used to undelete a bunch of files with extension DOC that you have just deleted?
In DOS, which of the following keys will bypass the CONFIG.SYS and AUTOEXEC.BAT files?
You want to view the contents of autoexec.bat on the screen using the "type" command, but it scrolls by too quickly, what switch do you use to make it pause?
What file contains commands that configure systems devices?
Which command is used to suppress the prompt that asks you to confirm that you want to delete the directory?
Which of the following is loaded for CD-ROM support?
To find out how much memory is available, you could type______.
Suppose you had an incurable computer virus and decided to wipe out all the data and partitions on your hard drive and reformat. What is the order in which you must delete the partitions?
While working with MS-DOS, which command is used to display the contents of a file and pause the display after each screenful of information?
Which DOS command is used to detect, diagnose and repair logical and physical disk errors on both, uncompressed and Double space compressed drive?
What command would you type to list all of the files in the current directory?
While working with MS-DOS, which command is used to move file from one directory to another?
A _____ boot is when DOS is restarted without turning off the computer.
While using the DIR command, you can use certain switches with it. Which one of the following cannot be used with DIR?
What is a TSR?
What does MSCDEX.EXE do?
Batch files contain a group of MS-DOS commands that are run in successive order. What filename extension identifies batch files?
After upgrading your computer to a new DOS version, an older application displays the error message "Incorrect DOS version". What should you do to run this application?
When executed from a bootable hard drive, which command will make a formatted floppy disk bootable?
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