Explore topic-wise MCQs in Engineering.

This section includes 4320 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.

601.

De Morgan's first theorem says that a NOR gate is equivalent to a bubbled _____ gate.

A. AND
B. XAND
C. XOR
D. NOR
E. None of the above
Answer» B. XAND
602.

How many bits are required to encode all twenty six letters ten symbols, and ten numerals?

A. 5
B. 6
C. 2
D. 3
E. None of the above
Answer» C. 2
603.

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

A. encoder
B. decoder
C. multiplexer
D. demultiplexer
E. None of the above
Answer» D. demultiplexer
604.

_____dominates the LSI field, and _____ is used extensively where lowest power consumption is necessary.

A. NMOS, PMOS
B. PMOS, CMOS
C. NMOS, CMOS
D. MOSFET, PMOS
E. None of the above
Answer» D. MOSFET, PMOS
605.

Digital design often starts by constructing a _____ table.

A. Standard
B. Two-stage
C. Truth
D. Two-dinensional
E. None of the above
Answer» D. Two-dinensional
606.

The time required for a pulse to decrease from 90 to 10 percent of its maximum value is known as

A. rise time
B. decay time
C. binary level transition period
D. propagation delay
E. None of the above
Answer» C. binary level transition period
607.

The hexadecimal digits are 0 to 9 and A to _____

A. E
B. F
C. G
D. D
E. None of the above
Answer» C. G
608.

The ASCII

A. is a subset of 8-bit EBCDIC
B. is used only in Western Countries
C. is version II of the ASC Standard
D. has 128 characters, including 32 control characters
E. None of the above
Answer» E. None of the above
609.

A diagram that illustrates the ore (Logic) of functions in a progran called a

A. Flowchart
B. Sequence of steps
C. Direction of flow
D. All of the above
E. None of the above
Answer» B. Sequence of steps
610.

Flip-flop outputs are always

A. complimentary
B. the same
C. independent of each other
D. same as inputs
E. None of the above
Answer» B. the same
611.

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.

A. No change, set
B. Race, high
C. high, reset
D. set, reset
E. None of the above
Answer» D. set, reset
612.

A _____ TTL device can sink up to 16mA and can source up to 400 MA.

A. Low-power
B. high-power
C. Standard
D. Schottky
E. None of the above
Answer» D. Schottky
613.

The output 0 and 1 levels for TTL logic family is approximately

A. 0.1 and 5 V
B. 0.6 and 3.5 V
C. 0.9 and 1.75V
D. -1.75 and -0.9 V
E. None of the above
Answer» C. 0.9 and 1.75V
614.

What is the 2's complement of 0011 0101 1001 1100 number?

A. 1100 1010 1100 1011
B. 1100 1010 0110 0011
C. 1100 1010 0110 0100
D. 1100 1010 1111 1111
E. None of the above
Answer» D. 1100 1010 1111 1111
615.

A p- channel enhancement type MOSFET performs much the same function as a PNP transistor, except that

A. it operates much faster
B. it is considerably larger
C. it is controlled by voltage rather than by current, so that it requires very little current at the control terminal
D. it is controlled by current rather than by voltage like a bipolar transistor.
E. None of the above
Answer» D. it is controlled by current rather than by voltage like a bipolar transistor.
616.

De Morgan's second therm says that NAND gate is equivalent to a bubbled _____ gate.

A. AND
B. XAND
C. XOR
D. OR
E. None of the above
Answer» E. None of the above
617.

What logic function is produced by adding an inverter to each input and the output of an AND gate?

A. NAND
B. NOR
C. OR
D. XOR
E. None of the above
Answer» D. XOR
618.

When a transistor is cut off or saturated, transistor _____ have almost no effect

A. wave
B. variations
C. stage
D. circuits
E. None of the above
Answer» C. stage
619.

Express -7 as 16-bit signed binary numbers.

A. 0000 0000 0000 0111
B. 1000 0000 0000 0111
C. . 0111 0000 0000 0001
D. 0111 0000 0000 0000
E. None of the above
Answer» C. . 0111 0000 0000 0001
620.

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. words, high
B. bytes, low
C. bytes, high
D. character, low
E. None of the above
Answer» B. bytes, low
621.

A positive AND gate is also a negative

A. NAND gate
B. NOR gate
C. AND gate
D. OR gate
E. None of the above
Answer» E. None of the above
622.

In which code the successive code characters differ in only one bit position?

A. gray code
B. excess 3 code
C. 8421 code
D. algebraic code
E. None of the above
Answer» B. excess 3 code
623.

ASCII and EBCDIC differ in

A. their efficiency in storing data
B. the random and sequential access method
C. the number of bytes used to store characters
D. their collecting sequences
E. None of the above
Answer» E. None of the above
624.

Which logic family dissipates the minimum power?

A. DTL
B. TTL
C. ECL
D. CMOS
E. None of the above
Answer» E. None of the above
625.

Address 200H contains the byte 3FH. What is the decimal equivalent of 3FH

A. 63
B. 32
C. 16
D. 38
E. None of the above
Answer» B. 32
626.

An OR gate can be imagined as

A. switches connected in series
B. switches connected in parallel
C. MOS transistors connected in series
D. All of the above
E. None of the above
Answer» C. MOS transistors connected in series
627.

The functional difference between SR flip-flop and JK flip-flop is that

A. JK flip-flop is faster than SR flip-flop
B. JK flip-flop has a feed back path
C. JK flip-flop accepts both inputs 1
D. JK flip-flop does not require external clock
E. None of the above
Answer» D. JK flip-flop does not require external clock
628.

Evaluate the following expression: 7 >=3 + 4 || 6<4 && 2<5

A. True
B. False
Answer» B. False
629.

When a language has the capability to produce new data types, it is said to be

A. reprehensible
B. encapsulated
C. overloaded
D. extensible
Answer» E.
630.

Which of the following statements uses the computer's clock to initialize the random number generator?

A. srand(time);
B. srand(time(NULL));
C. time(srand);
D. time(srand(NULL));
Answer» C. time(srand);
631.

The items listed in the function header are called _____

A. actual arguments
B. formal parameters
C. passed parameters
D. sent arguments
Answer» C. passed parameters
632.

A translator that notes whether you have used a language correctly may be called a _____

A. theasurus
B. compiler
C. coder
D. decoder
Answer» C. coder
633.

Which of the following can be used to declare the main function?

A. void main
B. void Main()
C. void main()
D. main
E. either (b) or (c) can be used
Answer» D. main
634.

You _____ write your own container classes

A. must
B. may
C. should not
D. must not
Answer» C. should not
635.

If an integer object is thrown with a throw statement, then a subsequent catch block has a usable match if the type of the catch argument is

A. int
B. double
C. either (a) or (b)
D. neither (a) nor (b)
Answer» B. double
636.

The highest level of cohesion is

A. functional cohesion
B. temporal cohesion
C. logical cohesion
D. sequential cohesion
Answer» B. temporal cohesion
637.

The base class for most stream classes is the _____ class

A. ios
B. out
C. in
D. app
Answer» B. out
638.

Errors in a program are called

A. accidents
B. annoyances
C. bugs
D. mistakes
E. typing errors
Answer» D. mistakes
639.

The most efficient data type for a variable that stores the number 4.6e20 is the _____ data type

A. Character
B. Double
C. Float
D. Long Integer
E. Short Integer
Answer» D. Long Integer
640.

The preprocessor directive always starts with the symbol

A. %
B. &
C. #
D. ""
E. None of the above
Answer» D. ""
641.

In a class specifier, data or functions designated private are accessible

A. to any function in the program
B. only if you know the password
C. to member functions of that class
D. only to public members of the class
Answer» D. only to public members of the class
642.

Which of the following is the inequality operator?

A. !=
B. =
C. ==
D. -->
E. <>
Answer» B. =
643.

When a function includes a throw statement for errors, the call to the potentially offending function should be placed within a _____ block

A. throw
B. try
C. catch
D. scope
Answer» C. catch
644.

The scope resolution operator is

A. a comma
B. a semicolon
C. a colon
D. two colons
Answer» E.
645.

If a derived class uses the public access specifier, then _____

A. public base class members remain public in the derived class
B. protected base class members become public in the derived class
C. both (a) and (b)
D. neither (a) nor (b)
Answer» B. protected base class members become public in the derived class
646.

The operator that releases previously allocated memory is _____

A. release
B. return
C. delete
D. destroy
Answer» D. destroy
647.

You must provide a constructor for a derived class

A. always
B. if the base class constructor required arguments
C. if the base class constructor does not required arguments
D. never
Answer» C. if the base class constructor does not required arguments
648.

"C++" is a _____ constant

A. character literal
B. named literal
C. numeric literal
D. string literal
Answer» E.
649.

In a C++ program, which of the following can be thrown?

A. scalar variables
B. programmer-defined objects
C. both (a) and (b)
D. neither (a) nor (b)
Answer» C. both (a) and (b)
650.

A function in a derived class that has the same name as a function in the parent class

A. will override the base class function
B. will cause an error message to display
C. will be overridden by the base class function
D. will execute immediately often the base class function executes
Answer» B. will cause an error message to display