

MCQOPTIONS
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 | |